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< title > Chapter  1.  Boost.Mp11</ title >
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< a name = "mp11" ></ a > Chapter  1.  Boost.Mp11</ h2 ></ div >
< div >< p class = "copyright" > Copyright © 2015-2017 Peter Dimov</ p ></ div >
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Distributed under the < a href = "http://boost.org/LICENSE_1_0.txt" target = "_top" > Boost
Software License, Version 1.0</ a > .
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< div class = "toc" >
< p >< b > Table of Contents</ b ></ p >
< dl class = "toc" >
< dt >< span class = "section" >< a href = "mp11.html#mp11.overview" > Overview</ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.definitions" > Definitions</ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.examples" > Examples</ a ></ span ></ dt >
< dd >< dl >
< dt >< span class = "section" >< a href = "mp11.html#mp11.examples.generating_test_cases" > Generating Test
Cases</ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.examples.writing_common_type_specializati" > Writing
< code class = "computeroutput" >< span class = "identifier" > common_type</ span ></ code > specializations</ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.examples.fixing_tuple_cat" > Fixing < code class = "computeroutput" >< span class = "identifier" > tuple_cat</ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.examples.computing_return_types" > Computing Return
Types</ a ></ span ></ dt >
</ dl ></ dd >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference" > Reference</ a ></ span ></ dt >
< dd >< dl >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integral" > Integral Constants, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > integral</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dd >< dl >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integral.mp_bool_b" >< code class = "computeroutput" >< span class = "identifier" > mp_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > B</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integral.mp_true" >< code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integral.mp_false" >< code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integral.mp_to_bool_t" >< code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integral.mp_not_t" >< code class = "computeroutput" >< span class = "identifier" > mp_not</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integral.mp_int_i" >< code class = "computeroutput" >< span class = "identifier" > mp_int</ span >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integral.mp_size_t_n" >< code class = "computeroutput" >< span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
</ dl ></ dd >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list" > List Operations, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > list</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dd >< dl >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_list_t" >< code class = "computeroutput" >< span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_size_l" >< code class = "computeroutput" >< span class = "identifier" > mp_size</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_empty_l" >< code class = "computeroutput" >< span class = "identifier" > mp_empty</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_front_l" >< code class = "computeroutput" >< span class = "identifier" > mp_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_pop_front_l" >< code class = "computeroutput" >< span class = "identifier" > mp_pop_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_first_l" >< code class = "computeroutput" >< span class = "identifier" > mp_first</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_rest_l" >< code class = "computeroutput" >< span class = "identifier" > mp_rest</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_second_l" >< code class = "computeroutput" >< span class = "identifier" > mp_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_third_l" >< code class = "computeroutput" >< span class = "identifier" > mp_third</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_push_front_l_t" >< code class = "computeroutput" >< span class = "identifier" > mp_push_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_push_back_l_t" >< code class = "computeroutput" >< span class = "identifier" > mp_push_back</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_rename_l_y" >< code class = "computeroutput" >< span class = "identifier" > mp_rename</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span >
< span class = "identifier" > Y</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_apply_f_l" >< code class = "computeroutput" >< span class = "identifier" > mp_apply</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span >
< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_apply_q_q_l" >< code class = "computeroutput" >< span class = "identifier" > mp_apply_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span >
< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_append_l" >< code class = "computeroutput" >< span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_replace_front_l_t" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_replace_first_l_t" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_first</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_replace_second_l_t" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.list.mp_replace_third_l_t" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_third</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
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</ dl ></ dd >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility" > Utility Components, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > utility</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dd >< dl >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility.mp_identity_t" >< code class = "computeroutput" >< span class = "identifier" > mp_identity</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility.mp_identity_t_t" >< code class = "computeroutput" >< span class = "identifier" > mp_identity_t</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility.mp_inherit_t" >< code class = "computeroutput" >< span class = "identifier" > mp_inherit</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility.mp_if_c_c_t_e" >< code class = "computeroutput" >< span class = "identifier" > mp_if_c</ span >< span class = "special" > < </ span >< span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > E</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility.mp_if_c_t_e" >< code class = "computeroutput" >< span class = "identifier" > mp_if</ span >< span class = "special" > < </ span >< span class = "identifier" > C</ span >< span class = "special" > ,</ span >
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< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > E</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility.mp_eval_if_c_c_t_f_u" >< code class = "computeroutput" >< span class = "identifier" > mp_eval_if_c</ span >< span class = "special" > < </ span >< span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span >
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< span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility.mp_eval_if_c_t_f_u" >< code class = "computeroutput" >< span class = "identifier" > mp_eval_if</ span >< span class = "special" > < </ span >< span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span >
< span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility.mp_eval_if_q_c_t_q_u" >< code class = "computeroutput" >< span class = "identifier" > mp_eval_if_q</ span >< span class = "special" > < </ span >< span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > Q</ span >< span class = "special" > ,</ span >
< span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility.mp_valid_f_t" >< code class = "computeroutput" >< span class = "identifier" > mp_valid</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility.mp_defer_f_t" >< code class = "computeroutput" >< span class = "identifier" > mp_defer</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility.mp_quote_f" >< code class = "computeroutput" >< span class = "identifier" > mp_quote</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility.mp_invoke_q_t" >< code class = "computeroutput" >< span class = "identifier" > mp_invoke</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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</ dl ></ dd >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm" > Algorithms, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > algorithm</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dd >< dl >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_assign_l1_l2" >< code class = "computeroutput" >< span class = "identifier" > mp_assign</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > ,</ span > < span class = "identifier" > L2</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_clear_l" >< code class = "computeroutput" >< span class = "identifier" > mp_clear</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_transform_f_l" >< code class = "computeroutput" >< span class = "identifier" > mp_transform</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_transform_q_q_l" >< code class = "computeroutput" >< span class = "identifier" > mp_transform_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
2017-03-18 20:36:58 +02:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_transform_if_p_f_l" >< code class = "computeroutput" >< span class = "identifier" > mp_transform_if</ span >< span class = "special" > < </ span >< span class = "identifier" > P</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_transform_if_q_qp_qf_l" >< code class = "computeroutput" >< span class = "identifier" > mp_transform_if_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Qp</ span >< span class = "special" > ,</ span > < span class = "identifier" > Qf</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_fill_l_v" >< code class = "computeroutput" >< span class = "identifier" > mp_fill</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_count_l_v" >< code class = "computeroutput" >< span class = "identifier" > mp_count</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_count_if_l_p" >< code class = "computeroutput" >< span class = "identifier" > mp_count_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_contains_l_v" >< code class = "computeroutput" >< span class = "identifier" > mp_contains</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_repeat_c_l_n" >< code class = "computeroutput" >< span class = "identifier" > mp_repeat_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_repeat_l_n" >< code class = "computeroutput" >< span class = "identifier" > mp_repeat</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_product_f_l" >< code class = "computeroutput" >< span class = "identifier" > mp_product</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
2017-05-13 21:07:54 +03:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_product_q_q_l" >< code class = "computeroutput" >< span class = "identifier" > mp_product_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
2017-03-14 22:57:07 +02:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_drop_c_l_n" >< code class = "computeroutput" >< span class = "identifier" > mp_drop_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_drop_l_n" >< code class = "computeroutput" >< span class = "identifier" > mp_drop</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
2017-03-15 19:43:06 +02:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_iota_c_n" >< code class = "computeroutput" >< span class = "identifier" > mp_iota_c</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_iota_n" >< code class = "computeroutput" >< span class = "identifier" > mp_iota</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
2017-03-14 22:57:07 +02:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_at_c_l_i" >< code class = "computeroutput" >< span class = "identifier" > mp_at_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_at_l_i" >< code class = "computeroutput" >< span class = "identifier" > mp_at</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span >
< span class = "identifier" > I</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_take_c_l_n" >< code class = "computeroutput" >< span class = "identifier" > mp_take_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_take_l_n" >< code class = "computeroutput" >< span class = "identifier" > mp_take</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
2017-05-13 21:52:56 +03:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_insert_c_l_i_t" >< code class = "computeroutput" >< span class = "identifier" > mp_insert_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_insert_l_i_t" >< code class = "computeroutput" >< span class = "identifier" > mp_insert</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_erase_c_l_i_j" >< code class = "computeroutput" >< span class = "identifier" > mp_erase_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > J</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_erase_l_i_j" >< code class = "computeroutput" >< span class = "identifier" > mp_erase</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > J</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
2017-03-14 22:57:07 +02:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_replace_l_v_w" >< code class = "computeroutput" >< span class = "identifier" > mp_replace</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "identifier" > W</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_replace_if_l_p_w" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > ,</ span > < span class = "identifier" > W</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
2017-03-18 20:36:58 +02:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_replace_at_c_l_i_w" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_at_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > W</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_replace_at_l_i_w" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_at</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > W</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
2017-03-14 22:57:07 +02:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_copy_if_l_p" >< code class = "computeroutput" >< span class = "identifier" > mp_copy_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_remove_l_v" >< code class = "computeroutput" >< span class = "identifier" > mp_remove</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_remove_if_l_p" >< code class = "computeroutput" >< span class = "identifier" > mp_remove_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_partition_l_p" >< code class = "computeroutput" >< span class = "identifier" > mp_partition</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_sort_l_p" >< code class = "computeroutput" >< span class = "identifier" > mp_sort</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_find_l_v" >< code class = "computeroutput" >< span class = "identifier" > mp_find</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_find_if_l_p" >< code class = "computeroutput" >< span class = "identifier" > mp_find_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_reverse_l" >< code class = "computeroutput" >< span class = "identifier" > mp_reverse</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_fold_l_v_f" >< code class = "computeroutput" >< span class = "identifier" > mp_fold</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_reverse_fold_l_v_f" >< code class = "computeroutput" >< span class = "identifier" > mp_reverse_fold</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_unique_l" >< code class = "computeroutput" >< span class = "identifier" > mp_unique</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_all_of_l_p" >< code class = "computeroutput" >< span class = "identifier" > mp_all_of</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_none_of_l_p" >< code class = "computeroutput" >< span class = "identifier" > mp_none_of</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_any_of_l_p" >< code class = "computeroutput" >< span class = "identifier" > mp_any_of</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
2017-05-13 00:23:58 +03:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.algorithm.mp_for_each_l_f" >< code class = "computeroutput" >< span class = "identifier" > mp_for_each</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > (</ span >< span class = "identifier" > f</ span >< span class = "special" > )</ span ></ code ></ a ></ span ></ dt >
2017-03-14 22:57:07 +02:00
</ dl ></ dd >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.set" > Set Operations, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > set</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dd >< dl >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.set.mp_set_contains_s_v" >< code class = "computeroutput" >< span class = "identifier" > mp_set_contains</ span >< span class = "special" > < </ span >< span class = "identifier" > S</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.set.mp_set_push_back_s_t" >< code class = "computeroutput" >< span class = "identifier" > mp_set_push_back</ span >< span class = "special" > < </ span >< span class = "identifier" > S</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.set.mp_set_push_front_s_t" >< code class = "computeroutput" >< span class = "identifier" > mp_set_push_front</ span >< span class = "special" > < </ span >< span class = "identifier" > S</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
</ dl ></ dd >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.map" > Map Operations, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > map</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dd >< dl >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.map.mp_map_find_m_k" >< code class = "computeroutput" >< span class = "identifier" > mp_map_find</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span >
< span class = "identifier" > K</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.map.mp_map_contains_m_k" >< code class = "computeroutput" >< span class = "identifier" > mp_map_contains</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > K</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.map.mp_map_insert_m_t" >< code class = "computeroutput" >< span class = "identifier" > mp_map_insert</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.map.mp_map_replace_m_t" >< code class = "computeroutput" >< span class = "identifier" > mp_map_replace</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.map.mp_map_update_m_t_f" >< code class = "computeroutput" >< span class = "identifier" > mp_map_update</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.map.mp_map_erase_m_k" >< code class = "computeroutput" >< span class = "identifier" > mp_map_erase</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > K</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
</ dl ></ dd >
2017-03-16 19:45:47 +02:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.function" > Helper Metafunctions, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > function</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dd >< dl >
2017-05-24 01:37:49 +03:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.function.mp_void_t" >< code class = "computeroutput" >< span class = "identifier" > mp_void</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
2017-03-16 19:45:47 +02:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.function.mp_and_t" >< code class = "computeroutput" >< span class = "identifier" > mp_and</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.function.mp_all_t" >< code class = "computeroutput" >< span class = "identifier" > mp_all</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.function.mp_or_t" >< code class = "computeroutput" >< span class = "identifier" > mp_or</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.function.mp_any_t" >< code class = "computeroutput" >< span class = "identifier" > mp_any</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
2017-05-18 14:20:58 +03:00
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.function.mp_same_t" >< code class = "computeroutput" >< span class = "identifier" > mp_same</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.function.mp_plus_t" >< code class = "computeroutput" >< span class = "identifier" > mp_plus</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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</ dl ></ dd >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.bind" > Bind, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > bind</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dd >< dl >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.bind.mp_arg_i" >< code class = "computeroutput" >< span class = "identifier" > mp_arg</ span >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.bind.1_9" >< code class = "computeroutput" >< span class = "identifier" > _1</ span ></ code > ,
..., < code class = "computeroutput" >< span class = "identifier" > _9</ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.bind.mp_bind_f_t" >< code class = "computeroutput" >< span class = "identifier" > mp_bind</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span >
< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.bind.mp_bind_q_q_t" >< code class = "computeroutput" >< span class = "identifier" > mp_bind_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span >
< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.bind.mp_bind_front_f_t" >< code class = "computeroutput" >< span class = "identifier" > mp_bind_front</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.bind.mp_bind_front_q_q_t" >< code class = "computeroutput" >< span class = "identifier" > mp_bind_front_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.bind.mp_bind_back_f_t" >< code class = "computeroutput" >< span class = "identifier" > mp_bind_back</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.bind.mp_bind_back_q_q_t" >< code class = "computeroutput" >< span class = "identifier" > mp_bind_back_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
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</ dl ></ dd >
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< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integer_sequence" > Integer Sequences,
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< code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > integer_sequence</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
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< dd >< dl >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integer_sequence.integer_sequence_t_i" >< code class = "computeroutput" >< span class = "identifier" > integer_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integer_sequence.make_integer_sequence_t_n" >< code class = "computeroutput" >< span class = "identifier" > make_integer_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integer_sequence.index_sequence_i" >< code class = "computeroutput" >< span class = "identifier" > index_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integer_sequence.make_index_sequence_n" >< code class = "computeroutput" >< span class = "identifier" > make_index_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integer_sequence.index_sequence_for_t" >< code class = "computeroutput" >< span class = "identifier" > index_sequence_for</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a ></ span ></ dt >
</ dl ></ dd >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.tuple_for_each" > A "for each"
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algorithm for tuple-like types, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > tuple_for_each</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a ></ span ></ dt >
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< dd >< dl >< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.tuple_for_each.tuple_for_each" >< code class = "computeroutput" >< span class = "identifier" > tuple_for_each</ span ></ code ></ a ></ span ></ dt ></ dl ></ dd >
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</ dl ></ dd >
</ dl >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h2 class = "title" style = "clear: both" >
< a name = "mp11.overview" ></ a >< a class = "link" href = "mp11.html#mp11.overview" title = "Overview" > Overview</ a >
</ h2 ></ div ></ div ></ div >
< p >
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Mp11 is a C++11 metaprogramming library based on template aliases and variadic
templates. It implements the approach outlined in the article < a href = "http://pdimov.com/cpp2/simple_cxx11_metaprogramming.html" target = "_top" > Simple
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C++11 metaprogramming</ a > and < a href = "http://pdimov.com/cpp2/simple_cxx11_metaprogramming_2.html" target = "_top" > its
sequel</ a > . Reading these articles before proceeding with this documentation
is highly recommended.
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</ p >
< p >
The general principles upon which Mp11 is built are that algorithms and metafunctions
are template aliases of the form < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code >
and data structures are lists of the form < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > ,
with the library placing no requirements on < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > .
< code class = "computeroutput" >< span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code >
is the built-in list type, but < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > > </ span ></ code > and < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > variant</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code >
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are also perfectly legitimate list types, although of course < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span >
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< span class = "identifier" > T2</ span >< span class = "special" > > </ span ></ code > ,
due to having exactly two elements, is not resizeable and will consequently
not work with algorithms that need to add or remove elements.
</ p >
< p >
Another distinguishing feature of this approach is that lists (< code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > ) have the same form as metafunctions
(< code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > )
and can therefore be used as such. For example, applying < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > add_pointer_t</ span ></ code >
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to the list < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > > </ span ></ code > by way of < code class = "computeroutput" >< span class = "identifier" > mp_transform</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > add_pointer_t</ span >< span class = "special" > ,</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > >> </ span ></ code > gives us < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > *,</ span > < span class = "keyword" > float</ span >< span class = "special" > *> </ span ></ code > , but we can also apply < code class = "computeroutput" >< span class = "identifier" > mp_list</ span ></ code >
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to the same tuple:
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > R</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_transform</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_list</ span >< span class = "special" > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > >> ;</ span >
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</ pre >
< p >
and get < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > > ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > >> </ span ></ code > .
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</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h2 class = "title" style = "clear: both" >
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< a name = "mp11.definitions" ></ a >< a class = "link" href = "mp11.html#mp11.definitions" title = "Definitions" > Definitions</ a >
</ h2 ></ div ></ div ></ div >
< p >
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A < span class = "emphasis" >< em > list</ em ></ span > is a — usually but not necessarily variadic — template
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class whose parameters are all types, for example < code class = "computeroutput" >< span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > [],</ span >
< span class = "keyword" > void</ span >< span class = "special" > > </ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > mp_list</ span >< span class = "special" > <> </ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > ,</ span > < span class = "keyword" > char</ span >< span class = "special" > > </ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > > </ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > shared_ptr</ span >< span class = "special" > < </ span >< span class = "identifier" > X</ span >< span class = "special" > > </ span ></ code > .
</ p >
< p >
A < span class = "emphasis" >< em > metafunction</ em ></ span > is a class template or a template alias
whose parameters are all types, for example < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > add_pointer_t</ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > is_const</ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > mp_second</ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > mp_push_front</ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > mp_list</ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > shared_ptr</ span ></ code > ,
or
</ p >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > using</ span > < span class = "identifier" > F1</ span > < span class = "special" > =</ span > < span class = "keyword" > void</ span >< span class = "special" > ;</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > F2</ span > < span class = "special" > =</ span > < span class = "identifier" > T</ span >< span class = "special" > *;</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > F3</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > integral_constant</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span >< span class = "special" > ,</ span > < span class = "keyword" > sizeof</ span >< span class = "special" > ...(</ span >< span class = "identifier" > T</ span >< span class = "special" > )> ;</ span >
</ pre >
< p >
A < span class = "emphasis" >< em > quoted metafunction</ em ></ span > is a class with a public metafunction
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member called < code class = "computeroutput" >< span class = "identifier" > fn</ span ></ code > , for example
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</ p >
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< pre class = "programlisting" >< span class = "keyword" > struct</ span > < span class = "identifier" > Q1</ span > < span class = "special" > {</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > using</ span > < span class = "identifier" > fn</ span > < span class = "special" > =</ span > < span class = "keyword" > void</ span >< span class = "special" > ;</ span > < span class = "special" > };</ span >
< span class = "keyword" > struct</ span > < span class = "identifier" > Q2</ span > < span class = "special" > {</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > fn</ span > < span class = "special" > =</ span > < span class = "identifier" > T</ span >< span class = "special" > *;</ span > < span class = "special" > };</ span >
< span class = "keyword" > struct</ span > < span class = "identifier" > Q3</ span > < span class = "special" > {</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > fn</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > integral_constant</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span >< span class = "special" > ,</ span > < span class = "keyword" > sizeof</ span >< span class = "special" > ...(</ span >< span class = "identifier" > T</ span >< span class = "special" > )> ;</ span > < span class = "special" > };</ span >
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</ pre >
< p >
An < span class = "emphasis" >< em > integral constant type</ em ></ span > is a class with a public member
< code class = "computeroutput" >< span class = "identifier" > value</ span ></ code > that is an integral constant
in the C++ sense. For example, < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > integral_constant</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span >
< span class = "number" > 7</ span >< span class = "special" > > </ span ></ code > ,
or
</ p >
< pre class = "programlisting" >< span class = "keyword" > struct</ span > < span class = "identifier" > N</ span > < span class = "special" > {</ span > < span class = "keyword" > static</ span > < span class = "keyword" > int</ span > < span class = "keyword" > constexpr</ span > < span class = "identifier" > value</ span > < span class = "special" > =</ span > < span class = "number" > 2</ span >< span class = "special" > ;</ span > < span class = "special" > };</ span >
</ pre >
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< p >
A < span class = "emphasis" >< em > set</ em ></ span > is a list whose elements are unique.
</ p >
< p >
A < span class = "emphasis" >< em > map</ em ></ span > is a list of lists, the inner lists having at least
one element (the key.) The keys of the map must be unique. For example,
</ p >
< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > M1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > *> ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > *> ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "keyword" > void</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > *>> ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > M2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > *> ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > > ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > ,</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 1</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 2</ span >< span class = "special" > ]>> ;</ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h2 class = "title" style = "clear: both" >
< a name = "mp11.examples" ></ a >< a class = "link" href = "mp11.html#mp11.examples" title = "Examples" > Examples</ a >
</ h2 ></ div ></ div ></ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
< a name = "mp11.examples.generating_test_cases" ></ a >< a class = "link" href = "mp11.html#mp11.examples.generating_test_cases" title = "Generating Test Cases" > Generating Test
Cases</ a >
</ h3 ></ div ></ div ></ div >
< p >
Let's suppose that we have written a metafunction < code class = "computeroutput" >< span class = "identifier" > result</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span >
< span class = "identifier" > U</ span >< span class = "special" > > </ span ></ code > :
</ p >
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< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > promote</ span > < span class = "special" > =</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > common_type</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ;</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > U</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > result</ span > < span class = "special" > =</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > common_type</ span >< span class = "special" > < </ span >< span class = "identifier" > promote</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > ,</ span > < span class = "identifier" > promote</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > >> ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ;</ span >
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</ pre >
< p >
that ought to represent the result of an arithmetic operation on the integer
types < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > and < code class = "computeroutput" >< span class = "identifier" > U</ span ></ code > , for example < code class = "computeroutput" >< span class = "identifier" > t</ span >
< span class = "special" > +</ span > < span class = "identifier" > u</ span ></ code > .
We want to test whether < code class = "computeroutput" >< span class = "identifier" > result</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span >
< span class = "identifier" > U</ span >< span class = "special" > > </ span ></ code >
gives correct results for various combinations of < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code >
and < code class = "computeroutput" >< span class = "identifier" > U</ span ></ code > , so we write the function
</ p >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T2</ span >< span class = "special" > > </ span > < span class = "keyword" > void</ span > < span class = "identifier" > test_result</ span >< span class = "special" > ()</ span >
< span class = "special" > {</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > T3</ span > < span class = "special" > =</ span > < span class = "keyword" > decltype</ span >< span class = "special" > (</ span > < span class = "identifier" > T1</ span >< span class = "special" > ()</ span > < span class = "special" > +</ span > < span class = "identifier" > T2</ span >< span class = "special" > ()</ span > < span class = "special" > );</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > T4</ span > < span class = "special" > =</ span > < span class = "identifier" > result</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > > ;</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > cout</ span > < span class = "special" > << </ span > < span class = "special" > (</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > is_same</ span >< span class = "special" > < </ span >< span class = "identifier" > T3</ span >< span class = "special" > ,</ span > < span class = "identifier" > T4</ span >< span class = "special" > > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > ?</ span > < span class = "string" > "[PASS]"</ span >< span class = "special" > :</ span > < span class = "string" > "[FAIL]"</ span > < span class = "special" > )</ span > < span class = "special" > << </ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > endl</ span >< span class = "special" > ;</ span >
< span class = "special" > }</ span >
</ pre >
< p >
and then need to call it a substantial number of times:
</ p >
< pre class = "programlisting" >< span class = "keyword" > int</ span > < span class = "identifier" > main</ span >< span class = "special" > ()</ span >
< span class = "special" > {</ span >
< span class = "identifier" > test_result</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > ,</ span > < span class = "keyword" > char</ span >< span class = "special" > > ();</ span >
< span class = "identifier" > test_result</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > ,</ span > < span class = "keyword" > short</ span >< span class = "special" > > ();</ span >
< span class = "identifier" > test_result</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > > ();</ span >
< span class = "identifier" > test_result</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > ,</ span > < span class = "keyword" > unsigned</ span >< span class = "special" > > ();</ span >
< span class = "comment" > // ...</ span >
< span class = "special" > }</ span >
</ pre >
< p >
Writing all those type combinations by hand is unwieldy, error prone, and
worst of all, boring. This is how we can leverage Mp11 to automate the task:
</ p >
< pre class = "programlisting" >< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span >
< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > core</ span >< span class = "special" > /</ span >< span class = "identifier" > demangle</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span >
< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > type_traits</ span >< span class = "special" > > </ span >
< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > iostream</ span >< span class = "special" > > </ span >
< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > typeinfo</ span >< span class = "special" > > </ span >
< span class = "keyword" > using</ span > < span class = "keyword" > namespace</ span > < span class = "identifier" > boost</ span >< span class = "special" > ::</ span >< span class = "identifier" > mp11</ span >< span class = "special" > ;</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > string</ span > < span class = "identifier" > name</ span >< span class = "special" > ()</ span >
< span class = "special" > {</ span >
< span class = "keyword" > return</ span > < span class = "identifier" > boost</ span >< span class = "special" > ::</ span >< span class = "identifier" > core</ span >< span class = "special" > ::</ span >< span class = "identifier" > demangle</ span >< span class = "special" > (</ span > < span class = "keyword" > typeid</ span >< span class = "special" > (</ span >< span class = "identifier" > T</ span >< span class = "special" > ).</ span >< span class = "identifier" > name</ span >< span class = "special" > ()</ span > < span class = "special" > );</ span >
< span class = "special" > }</ span >
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< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > promote</ span > < span class = "special" > =</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > common_type</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ;</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > U</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > result</ span > < span class = "special" > =</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > common_type</ span >< span class = "special" > < </ span >< span class = "identifier" > promote</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > ,</ span > < span class = "identifier" > promote</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > >> ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ;</ span >
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< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T2</ span >< span class = "special" > > </ span > < span class = "keyword" > void</ span > < span class = "identifier" > test_result</ span >< span class = "special" > (</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "special" > )</ span >
< span class = "special" > {</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > T3</ span > < span class = "special" > =</ span > < span class = "keyword" > decltype</ span >< span class = "special" > (</ span > < span class = "identifier" > T1</ span >< span class = "special" > ()</ span > < span class = "special" > +</ span > < span class = "identifier" > T2</ span >< span class = "special" > ()</ span > < span class = "special" > );</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > T4</ span > < span class = "special" > =</ span > < span class = "identifier" > result</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > > ;</ span >
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< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > cout</ span > < span class = "special" > << </ span > < span class = "special" > (</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > is_same</ span >< span class = "special" > < </ span >< span class = "identifier" > T3</ span >< span class = "special" > ,</ span > < span class = "identifier" > T4</ span >< span class = "special" > > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > ?</ span > < span class = "string" > "[PASS] "</ span >< span class = "special" > :</ span > < span class = "string" > "[FAIL] "</ span > < span class = "special" > )</ span >
< span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > > ()</ span > < span class = "special" > << </ span > < span class = "string" > " + "</ span > < span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > > ()</ span > < span class = "special" > << </ span > < span class = "string" > " -> "</ span > < span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "identifier" > T3</ span >< span class = "special" > > ()</ span > < span class = "special" > << </ span > < span class = "string" > ", result: "</ span > < span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "identifier" > T4</ span >< span class = "special" > > ()</ span > < span class = "special" > << </ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > endl</ span >< span class = "special" > ;</ span >
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< span class = "special" > }</ span >
< span class = "keyword" > int</ span > < span class = "identifier" > main</ span >< span class = "special" > ()</ span >
< span class = "special" > {</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > ,</ span > < span class = "keyword" > short</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > unsigned</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span >< span class = "special" > ,</ span > < span class = "keyword" > unsigned</ span > < span class = "keyword" > long</ span >< span class = "special" > > ;</ span >
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< span class = "identifier" > tuple_for_each</ span >< span class = "special" > (</ span > < span class = "identifier" > mp_product</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_list</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > > (),</ span > < span class = "special" > [](</ span >< span class = "keyword" > auto</ span >< span class = "special" > && </ span > < span class = "identifier" > x</ span >< span class = "special" > ){</ span > < span class = "identifier" > test_result</ span >< span class = "special" > (</ span >< span class = "identifier" > x</ span >< span class = "special" > );</ span > < span class = "special" > }</ span > < span class = "special" > );</ span >
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< span class = "special" > }</ span >
</ pre >
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< p >
How does it work?
</ p >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_product</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > L1</ span >< span class = "special" > ,</ span > < span class = "identifier" > L2</ span >< span class = "special" > > </ span ></ code >
calls < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > > </ span ></ code > where < code class = "computeroutput" >< span class = "identifier" > T1</ span ></ code >
varies over the elements of < code class = "computeroutput" >< span class = "identifier" > L1</ span ></ code >
and < code class = "computeroutput" >< span class = "identifier" > T2</ span ></ code > varies over the elements
of < code class = "computeroutput" >< span class = "identifier" > L2</ span ></ code > , as if by executing
two nested loops. It then returns a list of these results, of the same type
as < code class = "computeroutput" >< span class = "identifier" > L1</ span ></ code > .
</ p >
< p >
In our case, both lists are the same < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span ></ code > ,
and < code class = "computeroutput" >< span class = "identifier" > F</ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > mp_list</ span ></ code > ,
so < code class = "computeroutput" >< span class = "identifier" > mp_product</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_list</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code > will get us < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > ,</ span >
< span class = "keyword" > char</ span >< span class = "special" > > ,</ span >
< span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > ,</ span > < span class = "keyword" > short</ span >< span class = "special" > > ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > ,</ span >
< span class = "keyword" > int</ span >< span class = "special" > > ,</ span >
< span class = "special" > ...,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > unsigned</ span > < span class = "keyword" > long</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span >< span class = "special" > > ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > unsigned</ span > < span class = "keyword" > long</ span >< span class = "special" > ,</ span > < span class = "keyword" > unsigned</ span >
< span class = "keyword" > long</ span >< span class = "special" > >> </ span ></ code > .
</ p >
< p >
We then default-construct this tuple and pass it to < code class = "computeroutput" >< span class = "identifier" > tuple_for_each</ span ></ code > .
< code class = "computeroutput" >< span class = "identifier" > tuple_for_each</ span >< span class = "special" > (</ span >< span class = "identifier" > tp</ span >< span class = "special" > ,</ span > < span class = "identifier" > f</ span >< span class = "special" > )</ span ></ code > calls < code class = "computeroutput" >< span class = "identifier" > f</ span ></ code >
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for every tuple element; we use a (C++14) lambda that calls < code class = "computeroutput" >< span class = "identifier" > test_result</ span ></ code > .
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</ p >
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< p >
In pure C++11, we can't use a lambda with an < code class = "computeroutput" >< span class = "keyword" > auto</ span >< span class = "special" > && </ span ></ code > parameter, so we'll have to make
< code class = "computeroutput" >< span class = "identifier" > test_result</ span ></ code > a function object
with a templated < code class = "computeroutput" >< span class = "keyword" > operator</ span >< span class = "special" > ()</ span ></ code >
and pass that to < code class = "computeroutput" >< span class = "identifier" > tuple_for_each</ span ></ code >
directly:
</ p >
< pre class = "programlisting" >< span class = "keyword" > struct</ span > < span class = "identifier" > test_result</ span >
< span class = "special" > {</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T2</ span >< span class = "special" > > </ span > < span class = "keyword" > void</ span > < span class = "keyword" > operator</ span >< span class = "special" > ()(</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "special" > )</ span > < span class = "keyword" > const</ span >
< span class = "special" > {</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > T3</ span > < span class = "special" > =</ span > < span class = "keyword" > decltype</ span >< span class = "special" > (</ span > < span class = "identifier" > T1</ span >< span class = "special" > ()</ span > < span class = "special" > +</ span > < span class = "identifier" > T2</ span >< span class = "special" > ()</ span > < span class = "special" > );</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > T4</ span > < span class = "special" > =</ span > < span class = "identifier" > result</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > > ;</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > cout</ span > < span class = "special" > << </ span > < span class = "special" > (</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > is_same</ span >< span class = "special" > < </ span >< span class = "identifier" > T3</ span >< span class = "special" > ,</ span > < span class = "identifier" > T4</ span >< span class = "special" > > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > ?</ span > < span class = "string" > "[PASS] "</ span >< span class = "special" > :</ span > < span class = "string" > "[FAIL] "</ span > < span class = "special" > )</ span >
< span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > > ()</ span > < span class = "special" > << </ span > < span class = "string" > " + "</ span > < span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > > ()</ span > < span class = "special" > << </ span > < span class = "string" > " -> "</ span > < span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "identifier" > T3</ span >< span class = "special" > > ()</ span > < span class = "special" > << </ span > < span class = "string" > ", result: "</ span > < span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "identifier" > T4</ span >< span class = "special" > > ()</ span > < span class = "special" > << </ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > endl</ span >< span class = "special" > ;</ span >
< span class = "special" > }</ span >
< span class = "special" > };</ span >
< span class = "keyword" > int</ span > < span class = "identifier" > main</ span >< span class = "special" > ()</ span >
< span class = "special" > {</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > ,</ span > < span class = "keyword" > short</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > unsigned</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span >< span class = "special" > ,</ span > < span class = "keyword" > unsigned</ span > < span class = "keyword" > long</ span >< span class = "special" > > ;</ span >
< span class = "identifier" > tuple_for_each</ span >< span class = "special" > (</ span > < span class = "identifier" > mp_product</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_list</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > > (),</ span > < span class = "identifier" > test_result</ span >< span class = "special" > ()</ span > < span class = "special" > );</ span >
< span class = "special" > }</ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
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< a name = "mp11.examples.writing_common_type_specializati" ></ a >< a class = "link" href = "mp11.html#mp11.examples.writing_common_type_specializati" title = "Writing common_type specializations" > Writing
< code class = "computeroutput" >< span class = "identifier" > common_type</ span ></ code > specializations</ a >
</ h3 ></ div ></ div ></ div >
< p >
The standard trait < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > common_type</ span ></ code > , used to obtain a type to which
all of its arguments can convert without unnecessary loss of precision, can
be user-specialized when its default implementation (based on the ternary
< code class = "computeroutput" >< span class = "special" > ?:</ span ></ code > operator) is unsuitable.
</ p >
< p >
Let's write a < code class = "computeroutput" >< span class = "identifier" > common_type</ span ></ code >
specialization for two < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span ></ code >
arguments. For that, we need a metafunction that applies < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > common_type</ span ></ code >
to each pair of elements and gathers the results into a tuple:
</ p >
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< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > common_type_t</ span > < span class = "special" > =</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > common_type</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ;</ span > < span class = "comment" > // standard in C++14</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > Tp1</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > Tp2</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > common_tuple</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_transform</ span >< span class = "special" > < </ span >< span class = "identifier" > common_type_t</ span >< span class = "special" > ,</ span > < span class = "identifier" > Tp1</ span >< span class = "special" > ,</ span > < span class = "identifier" > Tp2</ span >< span class = "special" > > ;</ span >
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</ pre >
< p >
then specialize < code class = "computeroutput" >< span class = "identifier" > common_type</ span ></ code >
to use it:
</ p >
< pre class = "programlisting" >< span class = "keyword" > namespace</ span > < span class = "identifier" > std</ span >
< span class = "special" > {</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T2</ span >< span class = "special" > > </ span > < span class = "keyword" > struct</ span > < span class = "identifier" > common_type</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > ...>> :</ span > < span class = "identifier" > mp_defer</ span >< span class = "special" > < </ span >< span class = "identifier" > common_tuple</ span >< span class = "special" > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > ...>> </ span >
< span class = "special" > {</ span >
< span class = "special" > };</ span >
< span class = "special" > }</ span > < span class = "comment" > // std</ span >
</ pre >
< p >
(There is no need to specialize < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > common_type</ span ></ code >
for more than two arguments - it takes care of synthesizing the appropriate
semantics from the binary case.)
</ p >
< p >
The subtlety here is the use of < code class = "computeroutput" >< span class = "identifier" > mp_defer</ span ></ code > .
We could have defined a nested < code class = "computeroutput" >< span class = "identifier" > type</ span ></ code >
to < code class = "computeroutput" >< span class = "identifier" > common_tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > ...>> </ span ></ code > , and it would still have worked
in all valid cases. By letting < code class = "computeroutput" >< span class = "identifier" > mp_defer</ span ></ code >
define < code class = "computeroutput" >< span class = "identifier" > type</ span ></ code > , though, we make
our specialization < span class = "emphasis" >< em > SFINAE-friendly</ em ></ span > .
</ p >
< p >
That is, when our < code class = "computeroutput" >< span class = "identifier" > common_tuple</ span ></ code >
causes a substitution failure instead of a hard error, < code class = "computeroutput" >< span class = "identifier" > mp_defer</ span ></ code >
will not define a nested < code class = "computeroutput" >< span class = "identifier" > type</ span ></ code > ,
and < code class = "computeroutput" >< span class = "identifier" > common_type_t</ span ></ code > , which
is defined as < code class = "computeroutput" >< span class = "keyword" > typename</ span > < span class = "identifier" > common_type</ span >< span class = "special" > < ...> ::</ span >< span class = "identifier" > type</ span ></ code > ,
will also cause a substitution failure.
</ p >
< p >
As another example, consider the hypothetical type < code class = "computeroutput" >< span class = "identifier" > expected</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span >
< span class = "identifier" > E</ span >< span class = "special" > ...> </ span ></ code >
that represents either a successful return with a value of < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > , or an unsucessful return with an error
code of some type in the list < code class = "computeroutput" >< span class = "identifier" > E</ span >< span class = "special" > ...</ span ></ code > . The common type of < code class = "computeroutput" >< span class = "identifier" > expected</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > E1</ span >< span class = "special" > ,</ span >
< span class = "identifier" > E2</ span >< span class = "special" > ,</ span > < span class = "identifier" > E3</ span >< span class = "special" > > </ span ></ code >
and < code class = "computeroutput" >< span class = "identifier" > expected</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "identifier" > E1</ span >< span class = "special" > ,</ span > < span class = "identifier" > E4</ span >< span class = "special" > ,</ span >
< span class = "identifier" > E5</ span >< span class = "special" > > </ span ></ code >
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is < code class = "computeroutput" >< span class = "identifier" > expected</ span >< span class = "special" > < </ span >< span class = "identifier" > common_type_t</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > > ,</ span > < span class = "identifier" > E1</ span >< span class = "special" > ,</ span > < span class = "identifier" > E2</ span >< span class = "special" > ,</ span >
< span class = "identifier" > E3</ span >< span class = "special" > ,</ span > < span class = "identifier" > E4</ span >< span class = "special" > ,</ span > < span class = "identifier" > E5</ span >< span class = "special" > > </ span ></ code > . That is, the possible return values
are combined into their common type, and we take the union of the set of
error types.
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</ p >
< p >
Therefore,
</ p >
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< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > E1</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > E2</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > common_expected</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_rename</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_push_front</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_unique</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > E1</ span >< span class = "special" > ,</ span > < span class = "identifier" > E2</ span >< span class = "special" > >> ,</ span > < span class = "identifier" > common_type_t</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > >> ,</ span > < span class = "identifier" > expected</ span >< span class = "special" > > ;</ span >
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< span class = "keyword" > namespace</ span > < span class = "identifier" > std</ span >
< span class = "special" > {</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > E1</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > E2</ span >< span class = "special" > > </ span > < span class = "keyword" > struct</ span > < span class = "identifier" > common_type</ span >< span class = "special" > < </ span >< span class = "identifier" > expected</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > E1</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > expected</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "identifier" > E2</ span >< span class = "special" > ...>> :</ span > < span class = "identifier" > mp_defer</ span >< span class = "special" > < </ span >< span class = "identifier" > common_expected</ span >< span class = "special" > ,</ span > < span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > E1</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > E2</ span >< span class = "special" > ...>> </ span >
< span class = "special" > {</ span >
< span class = "special" > };</ span >
< span class = "special" > }</ span > < span class = "comment" > // std</ span >
</ pre >
< p >
Here we've taken a different tack; instead of passing the < code class = "computeroutput" >< span class = "identifier" > expected</ span ></ code >
types to < code class = "computeroutput" >< span class = "identifier" > common_expected</ span ></ code > ,
we're passing the < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > types
and lists of the < code class = "computeroutput" >< span class = "identifier" > E</ span ></ code > types.
This makes our job easier. < code class = "computeroutput" >< span class = "identifier" > mp_unique</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > E1</ span >< span class = "special" > ,</ span > < span class = "identifier" > E2</ span >< span class = "special" > >> </ span ></ code >
gives us the concatenation of < code class = "computeroutput" >< span class = "identifier" > E1</ span ></ code >
and < code class = "computeroutput" >< span class = "identifier" > E2</ span ></ code > with the duplicates
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removed; we then add < code class = "computeroutput" >< span class = "identifier" > common_type_t</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > > </ span ></ code >
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to the front via < code class = "computeroutput" >< span class = "identifier" > mp_push_front</ span ></ code > ;
and finally, we < code class = "computeroutput" >< span class = "identifier" > mp_rename</ span ></ code >
the resultant < code class = "computeroutput" >< span class = "identifier" > mp_list</ span ></ code > to
< code class = "computeroutput" >< span class = "identifier" > expected</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
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< a name = "mp11.examples.fixing_tuple_cat" ></ a >< a class = "link" href = "mp11.html#mp11.examples.fixing_tuple_cat" title = "Fixing tuple_cat" > Fixing < code class = "computeroutput" >< span class = "identifier" > tuple_cat</ span ></ code ></ a >
</ h3 ></ div ></ div ></ div >
< p >
The article < a href = "http://pdimov.com/cpp2/simple_cxx11_metaprogramming.html" target = "_top" > Simple
C++11 metaprogramming</ a > builds an implementation of the standard function
< code class = "computeroutput" >< span class = "identifier" > tuple_cat</ span ></ code > , with the end result
given below:
</ p >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > F</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_iota</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_size</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > >> ;</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > R</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span >< span class = "identifier" > Is</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > Ks</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > Tp</ span >< span class = "special" > > </ span >
< span class = "identifier" > R</ span > < span class = "identifier" > tuple_cat_</ span >< span class = "special" > (</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > Is</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > Ks</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > Tp</ span > < span class = "identifier" > tp</ span > < span class = "special" > )</ span >
< span class = "special" > {</ span >
< span class = "keyword" > return</ span > < span class = "identifier" > R</ span >< span class = "special" > {</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > get</ span >< span class = "special" > < </ span >< span class = "identifier" > Ks</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > > (</ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > get</ span >< span class = "special" > < </ span >< span class = "identifier" > Is</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > > (</ span >< span class = "identifier" > tp</ span >< span class = "special" > ))...</ span > < span class = "special" > };</ span >
< span class = "special" > }</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > Tp</ span >< span class = "special" > ,</ span >
< span class = "keyword" > class</ span > < span class = "identifier" > R</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > <> ,</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > remove_reference</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ...>> </ span >
< span class = "identifier" > R</ span > < span class = "identifier" > tuple_cat</ span >< span class = "special" > (</ span > < span class = "identifier" > Tp</ span > < span class = "special" > && ...</ span > < span class = "identifier" > tp</ span > < span class = "special" > )</ span >
< span class = "special" > {</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "keyword" > const</ span > < span class = "identifier" > N</ span > < span class = "special" > =</ span > < span class = "keyword" > sizeof</ span >< span class = "special" > ...(</ span >< span class = "identifier" > Tp</ span >< span class = "special" > );</ span >
< span class = "comment" > // inner</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > list1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_rename</ span >< span class = "special" > < </ span >< span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > remove_reference</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > > ...> ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > list2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_iota_c</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > list3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_transform</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_fill</ span >< span class = "special" > ,</ span > < span class = "identifier" > list1</ span >< span class = "special" > ,</ span > < span class = "identifier" > list2</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > inner</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_apply</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_append</ span >< span class = "special" > ,</ span > < span class = "identifier" > list3</ span >< span class = "special" > > ;</ span >
< span class = "comment" > // outer</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > list4</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_transform</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > list1</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > outer</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_apply</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_append</ span >< span class = "special" > ,</ span > < span class = "identifier" > list4</ span >< span class = "special" > > ;</ span >
< span class = "comment" > //</ span >
< span class = "keyword" > return</ span > < span class = "identifier" > tuple_cat_</ span >< span class = "special" > < </ span >< span class = "identifier" > R</ span >< span class = "special" > > (</ span > < span class = "identifier" > inner</ span >< span class = "special" > (),</ span > < span class = "identifier" > outer</ span >< span class = "special" > (),</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > forward_as_tuple</ span >< span class = "special" > (</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > forward</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > > (</ span >< span class = "identifier" > tp</ span >< span class = "special" > )...</ span > < span class = "special" > )</ span > < span class = "special" > );</ span >
< span class = "special" > }</ span >
</ pre >
< p >
This function, however, is not entirely correct, in that it doesn't handle
some cases properly. For example, trying to concatenate tuples containing
move-only elements such as < code class = "computeroutput" >< span class = "identifier" > unique_ptr</ span ></ code >
fails:
</ p >
< pre class = "programlisting" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > unique_ptr</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > >> </ span > < span class = "identifier" > t1</ span >< span class = "special" > ;</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > unique_ptr</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > >> </ span > < span class = "identifier" > t2</ span >< span class = "special" > ;</ span >
< span class = "keyword" > auto</ span > < span class = "identifier" > result</ span > < span class = "special" > =</ span > < span class = "special" > ::</ span >< span class = "identifier" > tuple_cat</ span >< span class = "special" > (</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > move</ span >< span class = "special" > (</ span > < span class = "identifier" > t1</ span > < span class = "special" > ),</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > move</ span >< span class = "special" > (</ span > < span class = "identifier" > t2</ span > < span class = "special" > )</ span > < span class = "special" > );</ span >
</ pre >
< p >
Trying to concatenate < code class = "computeroutput" >< span class = "keyword" > const</ span ></ code >
tuples fails:
</ p >
< pre class = "programlisting" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span > < span class = "identifier" > t1</ span >< span class = "special" > ;</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span > < span class = "identifier" > t2</ span >< span class = "special" > ;</ span >
< span class = "keyword" > auto</ span > < span class = "identifier" > result</ span > < span class = "special" > =</ span > < span class = "special" > ::</ span >< span class = "identifier" > tuple_cat</ span >< span class = "special" > (</ span > < span class = "identifier" > t1</ span >< span class = "special" > ,</ span > < span class = "identifier" > t2</ span > < span class = "special" > );</ span >
</ pre >
< p >
And finally, the standard < code class = "computeroutput" >< span class = "identifier" > tuple_cat</ span ></ code >
is specified to work on arbitrary tuple-like types (that is, all types that
support < code class = "computeroutput" >< span class = "identifier" > tuple_size</ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > tuple_element</ span ></ code > , and < code class = "computeroutput" >< span class = "identifier" > get</ span ></ code > ),
while our implementation only works with < code class = "computeroutput" >< span class = "identifier" > tuple</ span ></ code >
and < code class = "computeroutput" >< span class = "identifier" > pair</ span ></ code > . < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > array</ span ></ code > ,
for example, fails:
</ p >
< pre class = "programlisting" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > array</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "number" > 2</ span >< span class = "special" > > </ span > < span class = "identifier" > t1</ span >< span class = "special" > {</ span > < span class = "number" > 1</ span >< span class = "special" > ,</ span > < span class = "number" > 2</ span > < span class = "special" > };</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > array</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > ,</ span > < span class = "number" > 3</ span >< span class = "special" > > </ span > < span class = "identifier" > t2</ span >< span class = "special" > {</ span > < span class = "number" > 3.0f</ span >< span class = "special" > ,</ span > < span class = "number" > 4.0f</ span >< span class = "special" > ,</ span > < span class = "number" > 5.0f</ span > < span class = "special" > };</ span >
2017-05-19 01:43:30 +03:00
< span class = "keyword" > auto</ span > < span class = "identifier" > result</ span > < span class = "special" > =</ span > < span class = "special" > ::</ span >< span class = "identifier" > tuple_cat</ span >< span class = "special" > (</ span > < span class = "identifier" > t1</ span >< span class = "special" > ,</ span > < span class = "identifier" > t2</ span > < span class = "special" > );</ span >
2017-05-17 20:47:25 +03:00
</ pre >
< p >
Let's fix these one by one. Support for move-only types is easy, if one knows
where to look. The problem is that < code class = "computeroutput" >< span class = "identifier" > Tp</ span ></ code >
that we're passing to the helper < code class = "computeroutput" >< span class = "identifier" > tuple_cat_</ span ></ code >
is (correctly) < code class = "computeroutput" >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "identifier" > unique_ptr</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > >&& ,</ span >
< span class = "identifier" > unique_ptr</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > >&&> </ span ></ code > ,
but < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > get</ span >< span class = "special" > < </ span >< span class = "number" > 0</ span >< span class = "special" > > (</ span >< span class = "identifier" > tp</ span >< span class = "special" > )</ span ></ code > still returns < code class = "computeroutput" >< span class = "identifier" > unique_ptr</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > >& </ span ></ code > ,
because < code class = "computeroutput" >< span class = "identifier" > tp</ span ></ code > is an lvalue.
This behavior is a bit surprising, but consistent with how rvalue reference
members are treated by the language.
</ p >
< p >
Long story short, we need < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > move</ span >< span class = "special" > (</ span >< span class = "identifier" > tp</ span >< span class = "special" > )</ span ></ code >
in < code class = "computeroutput" >< span class = "identifier" > tuple_cat_</ span ></ code > to make < code class = "computeroutput" >< span class = "identifier" > tp</ span ></ code > an rvalue:
</ p >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > R</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span >< span class = "identifier" > Is</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > Ks</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > Tp</ span >< span class = "special" > > </ span >
< span class = "identifier" > R</ span > < span class = "identifier" > tuple_cat_</ span >< span class = "special" > (</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > Is</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > Ks</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > Tp</ span > < span class = "identifier" > tp</ span > < span class = "special" > )</ span >
< span class = "special" > {</ span >
< span class = "keyword" > return</ span > < span class = "identifier" > R</ span >< span class = "special" > {</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > get</ span >< span class = "special" > < </ span >< span class = "identifier" > Ks</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > > (</ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > get</ span >< span class = "special" > < </ span >< span class = "identifier" > Is</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > > (</ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > move</ span >< span class = "special" > (</ span >< span class = "identifier" > tp</ span >< span class = "special" > )))...</ span > < span class = "special" > };</ span >
< span class = "special" > }</ span >
</ pre >
< p >
Next, < code class = "computeroutput" >< span class = "keyword" > const</ span ></ code > -qualified tuples.
The issue here is that we're stripping references from the input tuples,
but not < code class = "computeroutput" >< span class = "keyword" > const</ span ></ code > . As a result,
we're trying to manipulate types such as < code class = "computeroutput" >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > > </ span >
< span class = "keyword" > const</ span ></ code > with Mp11 algorithms, and these
types do not fit the list concept. We just need to strip qualifiers as well,
by defining the useful < code class = "computeroutput" >< span class = "identifier" > remove_cv_ref</ span ></ code >
primitive that is inexplicably missing from the standard library:
</ p >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > remove_cv_ref</ span > < span class = "special" > =</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > remove_cv</ span >< span class = "special" > < </ span >
< span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > remove_reference</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ;</ span >
</ pre >
< p >
and then by using < code class = "computeroutput" >< span class = "identifier" > remove_cv_ref</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > > </ span ></ code > in place of < code class = "computeroutput" >< span class = "keyword" > typename</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > remove_reference</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span ></ code > :
</ p >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > Tp</ span >< span class = "special" > ,</ span >
< span class = "keyword" > class</ span > < span class = "identifier" > R</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > <> ,</ span > < span class = "identifier" > remove_cv_ref</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > > ...>> </ span >
< span class = "identifier" > R</ span > < span class = "identifier" > tuple_cat</ span >< span class = "special" > (</ span > < span class = "identifier" > Tp</ span > < span class = "special" > && ...</ span > < span class = "identifier" > tp</ span > < span class = "special" > )</ span >
< span class = "special" > {</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "keyword" > const</ span > < span class = "identifier" > N</ span > < span class = "special" > =</ span > < span class = "keyword" > sizeof</ span >< span class = "special" > ...(</ span >< span class = "identifier" > Tp</ span >< span class = "special" > );</ span >
< span class = "comment" > // inner</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > list1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_rename</ span >< span class = "special" > < </ span >< span class = "identifier" > remove_cv_ref</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > > ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > > ...> ;</ span >
< span class = "comment" > // ...</ span >
</ pre >
< p >
Finally, tuple-like types. We've so far exploited the fact that < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span ></ code >
and < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span ></ code > are valid Mp11 lists, but in general,
arbitrary tuple-like types aren't, so we need to convert them into such.
For that, we'll need to define a metafunction < code class = "computeroutput" >< span class = "identifier" > from_tuple_like</ span ></ code >
that will take an arbitrary tuple-like type and will return, in our case,
the corresponding < code class = "computeroutput" >< span class = "identifier" > mp_list</ span ></ code > .
</ p >
< p >
Technically, a more principled approach would've been to return < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span ></ code > ,
but here < code class = "computeroutput" >< span class = "identifier" > mp_list</ span ></ code > will prove
more convenient.
</ p >
< p >
What we need is, given a tuple-like type < code class = "computeroutput" >< span class = "identifier" > Tp</ span ></ code > ,
to obtain < code class = "computeroutput" >< span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple_element</ span >< span class = "special" > < </ span >< span class = "number" > 0</ span >< span class = "special" > ,</ span >
2017-05-19 01:43:30 +03:00
< span class = "identifier" > Tp</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple_element</ span >< span class = "special" > < </ span >< span class = "number" > 1</ span >< span class = "special" > ,</ span >
< span class = "identifier" > Tp</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple_element</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > -</ span >< span class = "number" > 1</ span >< span class = "special" > ,</ span > < span class = "identifier" > Tp</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > > </ span ></ code > , where < code class = "computeroutput" >< span class = "identifier" > N</ span ></ code >
2017-05-17 20:47:25 +03:00
is < code class = "computeroutput" >< span class = "identifier" > tuple_size</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > > ::</ span >< span class = "identifier" > value</ span ></ code > . Here's one way to do it:
</ p >
2017-05-19 01:43:30 +03:00
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > I</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > tuple_element</ span > < span class = "special" > =</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple_element</ span >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ;</ span >
2017-05-17 20:47:25 +03:00
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > from_tuple_like</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_product</ span >< span class = "special" > < </ span >< span class = "identifier" > tuple_element</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > ,</ span > < span class = "identifier" > mp_iota</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple_size</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > >>> ;</ span >
</ pre >
< p >
(< code class = "computeroutput" >< span class = "identifier" > mp_iota</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code > is
an algorithm that returns an < code class = "computeroutput" >< span class = "identifier" > mp_list</ span ></ code >
with elements < code class = "computeroutput" >< span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "number" > 0</ span >< span class = "special" > > </ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "number" > 1</ span >< span class = "special" > > </ span ></ code > , ...,
< code class = "computeroutput" >< span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > -</ span >< span class = "number" > 1</ span >< span class = "special" > > </ span ></ code > .)
</ p >
< p >
Remember that < code class = "computeroutput" >< span class = "identifier" > mp_product</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span >
< span class = "identifier" > L1</ span >< span class = "special" > ,</ span > < span class = "identifier" > L2</ span >< span class = "special" > > </ span ></ code >
performs the equivalent of two nested loops over the elements of < code class = "computeroutput" >< span class = "identifier" > L1</ span ></ code > and < code class = "computeroutput" >< span class = "identifier" > L2</ span ></ code > ,
applying < code class = "computeroutput" >< span class = "identifier" > F</ span ></ code > to the two variables
and gathering the result. In our case < code class = "computeroutput" >< span class = "identifier" > L1</ span ></ code >
consists of the single element < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > ,
so only the second loop (over < code class = "computeroutput" >< span class = "identifier" > mp_iota</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code > ,
where < code class = "computeroutput" >< span class = "identifier" > N</ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > tuple_size</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code > ),
remains, and we get a list of the same type as < code class = "computeroutput" >< span class = "identifier" > L1</ span ></ code >
(an < code class = "computeroutput" >< span class = "identifier" > mp_list</ span ></ code > ) with contents
< code class = "computeroutput" >< span class = "identifier" > tuple_element</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "number" > 0</ span >< span class = "special" > >> </ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > tuple_element</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "number" > 1</ span >< span class = "special" > >> </ span ></ code > ,
..., < code class = "computeroutput" >< span class = "identifier" > tuple_element</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > -</ span >< span class = "number" > 1</ span >< span class = "special" > >> </ span ></ code > .
</ p >
< p >
For completeness's sake, here's another, more traditional way to achieve
the same result:
</ p >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > from_tuple_like</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_transform_q</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_bind_front</ span >< span class = "special" > < </ span >< span class = "identifier" > tuple_element</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > ,</ span > < span class = "identifier" > mp_iota</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple_size</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > >>> ;</ span >
</ pre >
< p >
With all these fixes applied, our fully operational < code class = "computeroutput" >< span class = "identifier" > tuple_cat</ span ></ code >
now looks like this:
</ p >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > F</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_iota</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_size</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > >> ;</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > R</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span >< span class = "identifier" > Is</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > Ks</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > Tp</ span >< span class = "special" > > </ span >
< span class = "identifier" > R</ span > < span class = "identifier" > tuple_cat_</ span >< span class = "special" > (</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > Is</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > Ks</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > Tp</ span > < span class = "identifier" > tp</ span > < span class = "special" > )</ span >
< span class = "special" > {</ span >
< span class = "keyword" > return</ span > < span class = "identifier" > R</ span >< span class = "special" > {</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > get</ span >< span class = "special" > < </ span >< span class = "identifier" > Ks</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > > (</ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > get</ span >< span class = "special" > < </ span >< span class = "identifier" > Is</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > > (</ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > move</ span >< span class = "special" > (</ span >< span class = "identifier" > tp</ span >< span class = "special" > )))...</ span > < span class = "special" > };</ span >
< span class = "special" > }</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > remove_cv_ref</ span > < span class = "special" > =</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > remove_cv</ span >< span class = "special" > < </ span >
< span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > remove_reference</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ;</ span >
2017-05-19 01:43:30 +03:00
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > I</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > tuple_element</ span > < span class = "special" > =</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple_element</ span >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ;</ span >
2017-05-17 20:47:25 +03:00
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > from_tuple_like</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_product</ span >< span class = "special" > < </ span >< span class = "identifier" > tuple_element</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > ,</ span > < span class = "identifier" > mp_iota</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple_size</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > >>> ;</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > Tp</ span >< span class = "special" > ,</ span >
< span class = "keyword" > class</ span > < span class = "identifier" > R</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > <> ,</ span > < span class = "identifier" > from_tuple_like</ span >< span class = "special" > < </ span >< span class = "identifier" > remove_cv_ref</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > >> ...>> </ span >
< span class = "identifier" > R</ span > < span class = "identifier" > tuple_cat</ span >< span class = "special" > (</ span > < span class = "identifier" > Tp</ span > < span class = "special" > && ...</ span > < span class = "identifier" > tp</ span > < span class = "special" > )</ span >
< span class = "special" > {</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "keyword" > const</ span > < span class = "identifier" > N</ span > < span class = "special" > =</ span > < span class = "keyword" > sizeof</ span >< span class = "special" > ...(</ span >< span class = "identifier" > Tp</ span >< span class = "special" > );</ span >
< span class = "comment" > // inner</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > list1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > from_tuple_like</ span >< span class = "special" > < </ span >< span class = "identifier" > remove_cv_ref</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > >> ...> ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > list2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_iota_c</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > list3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_transform</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_fill</ span >< span class = "special" > ,</ span > < span class = "identifier" > list1</ span >< span class = "special" > ,</ span > < span class = "identifier" > list2</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > inner</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_apply</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_append</ span >< span class = "special" > ,</ span > < span class = "identifier" > list3</ span >< span class = "special" > > ;</ span >
< span class = "comment" > // outer</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > list4</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_transform</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > list1</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > outer</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_apply</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_append</ span >< span class = "special" > ,</ span > < span class = "identifier" > list4</ span >< span class = "special" > > ;</ span >
< span class = "comment" > //</ span >
< span class = "keyword" > return</ span > < span class = "identifier" > tuple_cat_</ span >< span class = "special" > < </ span >< span class = "identifier" > R</ span >< span class = "special" > > (</ span > < span class = "identifier" > inner</ span >< span class = "special" > (),</ span > < span class = "identifier" > outer</ span >< span class = "special" > (),</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > forward_as_tuple</ span >< span class = "special" > (</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > forward</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > > (</ span >< span class = "identifier" > tp</ span >< span class = "special" > )...</ span > < span class = "special" > )</ span > < span class = "special" > );</ span >
< span class = "special" > }</ span >
</ pre >
2017-03-17 05:55:27 +02:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
< a name = "mp11.examples.computing_return_types" ></ a >< a class = "link" href = "mp11.html#mp11.examples.computing_return_types" title = "Computing Return Types" > Computing Return
Types</ a >
</ h3 ></ div ></ div ></ div >
< p >
C++17 has a standard variant type, called < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > variant</ span ></ code > .
It also defines a function template < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > visit</ span ></ code >
that can be used to apply a function to the contained value of one or more
< code class = "computeroutput" >< span class = "identifier" > variant</ span ></ code > s. So for instance,
if the < code class = "computeroutput" >< span class = "identifier" > variant</ span ></ code > < code class = "computeroutput" >< span class = "identifier" > v1</ span ></ code > contains < code class = "computeroutput" >< span class = "number" > 1</ span ></ code > ,
and the < code class = "computeroutput" >< span class = "identifier" > variant</ span ></ code > < code class = "computeroutput" >< span class = "identifier" > v2</ span ></ code > contains < code class = "computeroutput" >< span class = "number" > 2.0f</ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > visit</ span >< span class = "special" > (</ span >< span class = "identifier" > f</ span >< span class = "special" > ,</ span > < span class = "identifier" > v1</ span >< span class = "special" > ,</ span > < span class = "identifier" > v2</ span >< span class = "special" > )</ span ></ code >
will call < code class = "computeroutput" >< span class = "identifier" > f</ span >< span class = "special" > (</ span >< span class = "number" > 1</ span >< span class = "special" > ,</ span > < span class = "number" > 2.0f</ span >< span class = "special" > )</ span ></ code > .
</ p >
< p >
However, < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > visit</ span ></ code > has one limitation: it cannot return
a result unless all possible applications of the function have the same return
type. If, for instance, < code class = "computeroutput" >< span class = "identifier" > v1</ span ></ code >
and < code class = "computeroutput" >< span class = "identifier" > v2</ span ></ code > are both of type
< code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > variant</ span >< span class = "special" > < </ span >< span class = "keyword" > short</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > > </ span ></ code > ,
</ p >
< pre class = "programlisting" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > visit</ span >< span class = "special" > (</ span > < span class = "special" > [](</ span > < span class = "keyword" > auto</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span >< span class = "special" > ,</ span > < span class = "keyword" > auto</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > y</ span > < span class = "special" > ){</ span > < span class = "keyword" > return</ span > < span class = "identifier" > x</ span > < span class = "special" > +</ span > < span class = "identifier" > y</ span >< span class = "special" > ;</ span > < span class = "special" > },</ span > < span class = "identifier" > v1</ span >< span class = "special" > ,</ span > < span class = "identifier" > v2</ span > < span class = "special" > );</ span >
</ pre >
< p >
will fail to compile because the result of < code class = "computeroutput" >< span class = "identifier" > x</ span >
< span class = "special" > +</ span > < span class = "identifier" > y</ span ></ code >
can be either < code class = "computeroutput" >< span class = "keyword" > int</ span ></ code > or < code class = "computeroutput" >< span class = "keyword" > float</ span ></ code > depending on what < code class = "computeroutput" >< span class = "identifier" > v1</ span ></ code >
and < code class = "computeroutput" >< span class = "identifier" > v2</ span ></ code > hold.
</ p >
< p >
A type that can hold either < code class = "computeroutput" >< span class = "keyword" > int</ span ></ code >
or < code class = "computeroutput" >< span class = "keyword" > float</ span ></ code > already exists, called,
surprisingly enough, < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > variant</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span >
< span class = "keyword" > float</ span >< span class = "special" > > </ span ></ code > .
Let's write our own function template < code class = "computeroutput" >< span class = "identifier" > rvisit</ span ></ code >
that is the same as < code class = "computeroutput" >< span class = "identifier" > visit</ span ></ code >
but returns a < code class = "computeroutput" >< span class = "identifier" > variant</ span ></ code > :
</ p >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span > < span class = "keyword" > auto</ span > < span class = "identifier" > rvisit</ span >< span class = "special" > (</ span > < span class = "identifier" > F</ span >< span class = "special" > && </ span > < span class = "identifier" > f</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > && ...</ span > < span class = "identifier" > v</ span > < span class = "special" > )</ span >
< span class = "special" > {</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
< span class = "keyword" > return</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > visit</ span >< span class = "special" > (</ span > < span class = "special" > [& ](</ span > < span class = "keyword" > auto</ span >< span class = "special" > && ...</ span > < span class = "identifier" > x</ span > < span class = "special" > ){</ span > < span class = "keyword" > return</ span > < span class = "identifier" > R</ span >< span class = "special" > (</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > forward</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > (</ span >< span class = "identifier" > f</ span >< span class = "special" > )(</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > forward</ span >< span class = "special" > < </ span >< span class = "keyword" > decltype</ span >< span class = "special" > (</ span >< span class = "identifier" > x</ span >< span class = "special" > )> (</ span >< span class = "identifier" > x</ span >< span class = "special" > )...</ span > < span class = "special" > )</ span > < span class = "special" > );</ span > < span class = "special" > },</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > forward</ span >< span class = "special" > < </ span >< span class = "identifier" > V</ span >< span class = "special" > > (</ span > < span class = "identifier" > v</ span > < span class = "special" > )...</ span > < span class = "special" > );</ span >
< span class = "special" > }</ span >
</ pre >
< p >
What this does is basically calls < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > visit</ span ></ code >
to do the work, but instead of passing it < code class = "computeroutput" >< span class = "identifier" > f</ span ></ code > ,
we pass a lambda that does the same as < code class = "computeroutput" >< span class = "identifier" > f</ span ></ code >
except it converts the result to a common type < code class = "computeroutput" >< span class = "identifier" > R</ span ></ code > .
< code class = "computeroutput" >< span class = "identifier" > R</ span ></ code > is supposed to be < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > variant</ span >< span class = "special" > < ...> </ span ></ code > where the ellipsis denotes the
return types of calling < code class = "computeroutput" >< span class = "identifier" > f</ span ></ code >
with all possible combinations of variant values.
</ p >
< p >
We'll first define a helper quoted metafunction < code class = "computeroutput" >< span class = "identifier" > Qret</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code >
that returns the result of the application of < code class = "computeroutput" >< span class = "identifier" > F</ span ></ code >
to arguments of type < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code > :
</ p >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span > < span class = "keyword" > struct</ span > < span class = "identifier" > Qret</ span >
< span class = "special" > {</ span >
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< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > fn</ span > < span class = "special" > =</ span > < span class = "keyword" > decltype</ span >< span class = "special" > (</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > declval</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > ()(</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > declval</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > ()...</ span > < span class = "special" > )</ span > < span class = "special" > );</ span >
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< span class = "special" > };</ span >
</ pre >
< p >
(Unfortunately, we can't just define this metafunction inside < code class = "computeroutput" >< span class = "identifier" > rvisit</ span ></ code > ; the language prohibits defining
template aliases inside functions.)
</ p >
< p >
With < code class = "computeroutput" >< span class = "identifier" > Qret</ span ></ code > in hand, a < code class = "computeroutput" >< span class = "identifier" > variant</ span ></ code > of the possible return types is
just a matter of applying it over the possible combinations of the variant
values:
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > R</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_product_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Qret</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > remove_reference_t</ span >< span class = "special" > < </ span >< span class = "identifier" > V</ span >< span class = "special" > > ...> ;</ span >
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</ pre >
< p >
Why does this work? < code class = "computeroutput" >< span class = "identifier" > mp_product</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span >
< span class = "identifier" > L1</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > L2</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > ...> ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > Ln</ span >< span class = "special" > < </ span >< span class = "identifier" > Tn</ span >< span class = "special" > ...>> </ span ></ code > returns < code class = "computeroutput" >< span class = "identifier" > L1</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > U1</ span >< span class = "special" > ,</ span > < span class = "identifier" > U2</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > Un</ span >< span class = "special" > > ,</ span > < span class = "special" > ...> </ span ></ code > ,
where < code class = "computeroutput" >< span class = "identifier" > Ui</ span ></ code > traverse all possible
combinations of list values. Since in our case all < code class = "computeroutput" >< span class = "identifier" > Li</ span ></ code >
are < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > variant</ span ></ code > , the result will also be < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > variant</ span ></ code > .
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(< code class = "computeroutput" >< span class = "identifier" > mp_product_q</ span ></ code > is the same
as < code class = "computeroutput" >< span class = "identifier" > mp_product</ span ></ code > , but for quoted
metafunctions such as our < code class = "computeroutput" >< span class = "identifier" > Qret</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code > .)
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</ p >
< p >
One more step remains. Suppose that, as above, we're passing two variants
of type < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > variant</ span >< span class = "special" > < </ span >< span class = "keyword" > short</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > > </ span ></ code >
and < code class = "computeroutput" >< span class = "identifier" > F</ span ></ code > is < code class = "computeroutput" >< span class = "special" > [](</ span >
< span class = "keyword" > auto</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span >< span class = "special" > ,</ span > < span class = "keyword" > auto</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > y</ span > < span class = "special" > ){</ span > < span class = "keyword" > return</ span > < span class = "identifier" > x</ span > < span class = "special" > +</ span > < span class = "identifier" > y</ span >< span class = "special" > ;</ span > < span class = "special" > }</ span ></ code > . This
will generate < code class = "computeroutput" >< span class = "identifier" > R</ span ></ code > of length
9, one per each combination, but many of those elements will be the same,
either < code class = "computeroutput" >< span class = "keyword" > int</ span ></ code > or < code class = "computeroutput" >< span class = "keyword" > float</ span ></ code > , and we need to filter out the duplicates.
So,
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > R</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_unique</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_product</ span >< span class = "special" > < </ span >< span class = "identifier" > Qret</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > ::</ span >< span class = "keyword" > template</ span > < span class = "identifier" > fn</ span >< span class = "special" > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > remove_reference_t</ span >< span class = "special" > < </ span >< span class = "identifier" > V</ span >< span class = "special" > > ...>> ;</ span >
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</ pre >
< p >
and we're done:
</ p >
< pre class = "programlisting" >< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span >
< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > core</ span >< span class = "special" > /</ span >< span class = "identifier" > demangle</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span >
< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > variant</ span >< span class = "special" > > </ span >
< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > type_traits</ span >< span class = "special" > > </ span >
< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > typeinfo</ span >< span class = "special" > > </ span >
< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > iostream</ span >< span class = "special" > > </ span >
< span class = "keyword" > using</ span > < span class = "keyword" > namespace</ span > < span class = "identifier" > boost</ span >< span class = "special" > ::</ span >< span class = "identifier" > mp11</ span >< span class = "special" > ;</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span > < span class = "keyword" > struct</ span > < span class = "identifier" > Qret</ span >
< span class = "special" > {</ span >
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< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > fn</ span > < span class = "special" > =</ span > < span class = "keyword" > decltype</ span >< span class = "special" > (</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > declval</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > ()(</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > declval</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > ()...</ span > < span class = "special" > )</ span > < span class = "special" > );</ span >
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< span class = "special" > };</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span > < span class = "keyword" > auto</ span > < span class = "identifier" > rvisit</ span >< span class = "special" > (</ span > < span class = "identifier" > F</ span >< span class = "special" > && </ span > < span class = "identifier" > f</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > && ...</ span > < span class = "identifier" > v</ span > < span class = "special" > )</ span >
< span class = "special" > {</ span >
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< span class = "keyword" > using</ span > < span class = "identifier" > R</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_unique</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_product_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Qret</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > remove_reference_t</ span >< span class = "special" > < </ span >< span class = "identifier" > V</ span >< span class = "special" > > ...>> ;</ span >
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< span class = "keyword" > return</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > visit</ span >< span class = "special" > (</ span > < span class = "special" > [& ](</ span > < span class = "keyword" > auto</ span >< span class = "special" > && ...</ span > < span class = "identifier" > x</ span > < span class = "special" > ){</ span > < span class = "keyword" > return</ span > < span class = "identifier" > R</ span >< span class = "special" > (</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > forward</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > (</ span >< span class = "identifier" > f</ span >< span class = "special" > )(</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > forward</ span >< span class = "special" > < </ span >< span class = "keyword" > decltype</ span >< span class = "special" > (</ span >< span class = "identifier" > x</ span >< span class = "special" > )> (</ span >< span class = "identifier" > x</ span >< span class = "special" > )...</ span > < span class = "special" > )</ span > < span class = "special" > );</ span > < span class = "special" > },</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > forward</ span >< span class = "special" > < </ span >< span class = "identifier" > V</ span >< span class = "special" > > (</ span > < span class = "identifier" > v</ span > < span class = "special" > )...</ span > < span class = "special" > );</ span >
< span class = "special" > }</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > string</ span > < span class = "identifier" > name</ span >< span class = "special" > ()</ span >
< span class = "special" > {</ span >
< span class = "keyword" > return</ span > < span class = "identifier" > boost</ span >< span class = "special" > ::</ span >< span class = "identifier" > core</ span >< span class = "special" > ::</ span >< span class = "identifier" > demangle</ span >< span class = "special" > (</ span > < span class = "keyword" > typeid</ span >< span class = "special" > (</ span >< span class = "identifier" > T</ span >< span class = "special" > ).</ span >< span class = "identifier" > name</ span >< span class = "special" > ()</ span > < span class = "special" > );</ span >
< span class = "special" > }</ span >
< span class = "keyword" > int</ span > < span class = "identifier" > main</ span >< span class = "special" > ()</ span >
< span class = "special" > {</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > variant</ span >< span class = "special" > < </ span >< span class = "keyword" > signed</ span > < span class = "keyword" > char</ span >< span class = "special" > ,</ span > < span class = "keyword" > unsigned</ span > < span class = "keyword" > char</ span >< span class = "special" > ,</ span > < span class = "keyword" > signed</ span > < span class = "keyword" > short</ span >< span class = "special" > ,</ span > < span class = "keyword" > unsigned</ span > < span class = "keyword" > short</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > unsigned</ span >< span class = "special" > > </ span > < span class = "identifier" > v1</ span >< span class = "special" > (</ span > < span class = "number" > 1</ span > < span class = "special" > );</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > cout</ span > < span class = "special" > << </ span > < span class = "string" > "("</ span > < span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "keyword" > decltype</ span >< span class = "special" > (</ span >< span class = "identifier" > v1</ span >< span class = "special" > )> ()</ span > < span class = "special" > << </ span > < span class = "string" > ")v1: "</ span >< span class = "special" > ;</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > visit</ span >< span class = "special" > (</ span > < span class = "special" > [](</ span > < span class = "keyword" > auto</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span > < span class = "special" > ){</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > cout</ span > < span class = "special" > << </ span > < span class = "string" > "("</ span > < span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "keyword" > decltype</ span >< span class = "special" > (</ span >< span class = "identifier" > x</ span >< span class = "special" > )> ()</ span > < span class = "special" > << </ span > < span class = "string" > ")"</ span > < span class = "special" > << </ span > < span class = "identifier" > x</ span > < span class = "special" > << </ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > endl</ span >< span class = "special" > ;</ span > < span class = "special" > },</ span > < span class = "identifier" > v1</ span > < span class = "special" > );</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > variant</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > ,</ span > < span class = "keyword" > double</ span >< span class = "special" > > </ span > < span class = "identifier" > v2</ span >< span class = "special" > (</ span > < span class = "number" > 2.0f</ span > < span class = "special" > );</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > cout</ span > < span class = "special" > << </ span > < span class = "string" > "("</ span > < span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "keyword" > decltype</ span >< span class = "special" > (</ span >< span class = "identifier" > v2</ span >< span class = "special" > )> ()</ span > < span class = "special" > << </ span > < span class = "string" > ")v2: "</ span >< span class = "special" > ;</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > visit</ span >< span class = "special" > (</ span > < span class = "special" > [](</ span > < span class = "keyword" > auto</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span > < span class = "special" > ){</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > cout</ span > < span class = "special" > << </ span > < span class = "string" > "("</ span > < span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "keyword" > decltype</ span >< span class = "special" > (</ span >< span class = "identifier" > x</ span >< span class = "special" > )> ()</ span > < span class = "special" > << </ span > < span class = "string" > ")"</ span > < span class = "special" > << </ span > < span class = "identifier" > x</ span > < span class = "special" > << </ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > endl</ span >< span class = "special" > ;</ span > < span class = "special" > },</ span > < span class = "identifier" > v2</ span > < span class = "special" > );</ span >
< span class = "keyword" > auto</ span > < span class = "identifier" > v3</ span > < span class = "special" > =</ span > < span class = "identifier" > rvisit</ span >< span class = "special" > (</ span > < span class = "special" > [](</ span > < span class = "keyword" > auto</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span >< span class = "special" > ,</ span > < span class = "keyword" > auto</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > y</ span > < span class = "special" > ){</ span > < span class = "keyword" > return</ span > < span class = "identifier" > x</ span > < span class = "special" > +</ span > < span class = "identifier" > y</ span >< span class = "special" > ;</ span > < span class = "special" > },</ span > < span class = "identifier" > v1</ span >< span class = "special" > ,</ span > < span class = "identifier" > v2</ span > < span class = "special" > );</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > cout</ span > < span class = "special" > << </ span > < span class = "string" > "("</ span > < span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "keyword" > decltype</ span >< span class = "special" > (</ span >< span class = "identifier" > v3</ span >< span class = "special" > )> ()</ span > < span class = "special" > << </ span > < span class = "string" > ")v3: "</ span >< span class = "special" > ;</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > visit</ span >< span class = "special" > (</ span > < span class = "special" > [](</ span > < span class = "keyword" > auto</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span > < span class = "special" > ){</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > cout</ span > < span class = "special" > << </ span > < span class = "string" > "("</ span > < span class = "special" > << </ span > < span class = "identifier" > name</ span >< span class = "special" > < </ span >< span class = "keyword" > decltype</ span >< span class = "special" > (</ span >< span class = "identifier" > x</ span >< span class = "special" > )> ()</ span > < span class = "special" > << </ span > < span class = "string" > ")"</ span > < span class = "special" > << </ span > < span class = "identifier" > x</ span > < span class = "special" > << </ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > endl</ span >< span class = "special" > ;</ span > < span class = "special" > },</ span > < span class = "identifier" > v3</ span > < span class = "special" > );</ span >
< span class = "special" > }</ span >
</ pre >
</ div >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h2 class = "title" style = "clear: both" >
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< a name = "mp11.reference" ></ a >< a class = "link" href = "mp11.html#mp11.reference" title = "Reference" > Reference</ a >
</ h2 ></ div ></ div ></ div >
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< p >
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The contents of the library are in namespace < code class = "computeroutput" >< span class = "identifier" > boost</ span >< span class = "special" > ::</ span >< span class = "identifier" > mp11</ span ></ code > .
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</ p >
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< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
< a name = "mp11.reference.integral" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integral" title = "Integral Constants, <boost/mp11/integral.hpp>" > Integral Constants, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > integral</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a >
</ h3 ></ div ></ div ></ div >
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< p >
For an Mp11 integral constant type < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span ></ code > is an integral constant in the C++
sense.
</ p >
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< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.integral.mp_bool_b" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integral.mp_bool_b" title = "mp_bool<B>" >< code class = "computeroutput" >< span class = "identifier" > mp_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > B</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > bool</ span > < span class = "identifier" > B</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_bool</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > integral_constant</ span >< span class = "special" > < </ span >< span class = "keyword" > bool</ span >< span class = "special" > ,</ span > < span class = "identifier" > B</ span >< span class = "special" > > ;</ span >
</ pre >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.integral.mp_true" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integral.mp_true" title = "mp_true" >< code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > mp_true</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_bool</ span >< span class = "special" > < </ span >< span class = "keyword" > true</ span >< span class = "special" > > ;</ span >
</ pre >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.integral.mp_false" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integral.mp_false" title = "mp_false" >< code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > mp_false</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_bool</ span >< span class = "special" > < </ span >< span class = "keyword" > false</ span >< span class = "special" > > ;</ span >
</ pre >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.integral.mp_to_bool_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integral.mp_to_bool_t" title = "mp_to_bool<T>" >< code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_to_bool</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_bool</ span >< span class = "special" > < </ span >< span class = "keyword" > static_cast</ span >< span class = "special" > < </ span >< span class = "keyword" > bool</ span >< span class = "special" > > (</ span >< span class = "identifier" > T</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > )> ;</ span >
</ pre >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.integral.mp_not_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integral.mp_not_t" title = "mp_not<T>" >< code class = "computeroutput" >< span class = "identifier" > mp_not</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_not</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_bool</ span >< span class = "special" > < </ span > < span class = "special" > !</ span >< span class = "identifier" > T</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span > < span class = "special" > > ;</ span >
</ pre >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.integral.mp_int_i" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integral.mp_int_i" title = "mp_int<I>" >< code class = "computeroutput" >< span class = "identifier" > mp_int</ span >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span > < span class = "identifier" > I</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_int</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > integral_constant</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > > ;</ span >
</ pre >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.integral.mp_size_t_n" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integral.mp_size_t_n" title = "mp_size_t<N>" >< code class = "computeroutput" >< span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_size_t</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > integral_constant</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > ;</ span >
</ pre >
</ div >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
< a name = "mp11.reference.list" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list" title = "List Operations, <boost/mp11/list.hpp>" > List Operations, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > list</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a >
</ h3 ></ div ></ div ></ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_list_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_list_t" title = "mp_list<T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > struct</ span > < span class = "identifier" > mp_list</ span > < span class = "special" > {};</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_list</ span ></ code > is the standard
list type of Mp11, although the library is not restricted to it and can
operate on arbitrary class templates such as < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span ></ code >
or < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > variant</ span ></ code > . Even < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span ></ code >
can be used if the transformation does not alter the number of the elements
in the list.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_size_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_size_l" title = "mp_size<L>" >< code class = "computeroutput" >< span class = "identifier" > mp_size</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_size</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_size</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code >
returns the number of elements in the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > ,
as a < code class = "computeroutput" >< span class = "identifier" > mp_size_t</ span ></ code > . In other
words, < code class = "computeroutput" >< span class = "identifier" > mp_size</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...>> </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "keyword" > sizeof</ span >< span class = "special" > ...(</ span >< span class = "identifier" > T</ span >< span class = "special" > )> </ span ></ code > .
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > <> ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_size</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_size_t< 0> </ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L2</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_size</ span >< span class = "special" > < </ span >< span class = "identifier" > L2</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_size_t< 2> </ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L3</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_size</ span >< span class = "special" > < </ span >< span class = "identifier" > L3</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_size_t< 1> </ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_empty_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_empty_l" title = "mp_empty<L>" >< code class = "computeroutput" >< span class = "identifier" > mp_empty</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_empty</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_size</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > ::</ span >< span class = "identifier" > value</ span > < span class = "special" > ==</ span > < span class = "number" > 0</ span >< span class = "special" > > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_empty</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code >
if the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > is empty,
for < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code > otherwise.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_front_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_front_l" title = "mp_front<L>" >< code class = "computeroutput" >< span class = "identifier" > mp_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_front</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code >
is the first element of the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > .
That is, < code class = "computeroutput" >< span class = "identifier" > mp_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...>> </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > T1</ span ></ code > .
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > > ;</ span > < span class = "comment" > // int</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L2</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > ,</ span > < span class = "keyword" > double</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span > < span class = "keyword" > double</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L2</ span >< span class = "special" > > ;</ span > < span class = "comment" > // float</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 1</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 2</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 3</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 4</ span >< span class = "special" > ]> ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L3</ span >< span class = "special" > > ;</ span > < span class = "comment" > // char[1]</ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_pop_front_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_pop_front_l" title = "mp_pop_front<L>" >< code class = "computeroutput" >< span class = "identifier" > mp_pop_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_pop_front</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_pop_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code >
removes the first element of the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > .
That is, < code class = "computeroutput" >< span class = "identifier" > mp_pop_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...>> </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > .
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > ,</ span > < span class = "keyword" > double</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span > < span class = "keyword" > double</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_pop_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > > ;</ span > < span class = "comment" > // std::tuple< double, long double> </ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > void</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_pop_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L2</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_list<> </ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_first_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_first_l" title = "mp_first<L>" >< code class = "computeroutput" >< span class = "identifier" > mp_first</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_first</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_first</ span ></ code > is another name
for < code class = "computeroutput" >< span class = "identifier" > mp_front</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_rest_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_rest_l" title = "mp_rest<L>" >< code class = "computeroutput" >< span class = "identifier" > mp_rest</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_rest</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_pop_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_rest</ span ></ code > is another name
for < code class = "computeroutput" >< span class = "identifier" > mp_pop_front</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_second_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_second_l" title = "mp_second<L>" >< code class = "computeroutput" >< span class = "identifier" > mp_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_second</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code >
is the second element of the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > .
That is, < code class = "computeroutput" >< span class = "identifier" > mp_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...>> </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > T2</ span ></ code > .
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > > ;</ span > < span class = "comment" > // float</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L2</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > ,</ span > < span class = "keyword" > double</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span > < span class = "keyword" > double</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L2</ span >< span class = "special" > > ;</ span > < span class = "comment" > // double</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 1</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 2</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 3</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 4</ span >< span class = "special" > ]> ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L3</ span >< span class = "special" > > ;</ span > < span class = "comment" > // char[2]</ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_third_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_third_l" title = "mp_third<L>" >< code class = "computeroutput" >< span class = "identifier" > mp_third</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_third</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_third</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code >
is the third element of the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > .
That is, < code class = "computeroutput" >< span class = "identifier" > mp_third</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "identifier" > T3</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...>> </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > T3</ span ></ code > .
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > ,</ span > < span class = "keyword" > double</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span > < span class = "keyword" > double</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_third</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > > ;</ span > < span class = "comment" > // long double</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 1</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 2</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 3</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 4</ span >< span class = "special" > ]> ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_third</ span >< span class = "special" > < </ span >< span class = "identifier" > L2</ span >< span class = "special" > > ;</ span > < span class = "comment" > // char[3]</ span >
</ pre >
2017-03-14 22:57:07 +02:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_push_front_l_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_push_front_l_t" title = "mp_push_front<L, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_push_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_push_front</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_push_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > inserts the elements < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code >
at the front of the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > .
That is, < code class = "computeroutput" >< span class = "identifier" > mp_push_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > is an alias for < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...,</ span > < span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code > .
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > double</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span > < span class = "keyword" > double</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_push_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > > ;</ span > < span class = "comment" > // std::tuple< float, double, long double> </ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > void</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_push_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L2</ span >< span class = "special" > ,</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 1</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 2</ span >< span class = "special" > ]> ;</ span > < span class = "comment" > // mp_list< char[1], char[2], void> </ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_push_back_l_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_push_back_l_t" title = "mp_push_back<L, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_push_back</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_push_back</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_push_back</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > inserts the elements < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code >
at the back of the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > .
That is, < code class = "computeroutput" >< span class = "identifier" > mp_push_back</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > ...,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > .
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > double</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span > < span class = "keyword" > double</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_push_back</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > > ;</ span > < span class = "comment" > // std::tuple< double, long double, float> </ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > void</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_push_back</ span >< span class = "special" > < </ span >< span class = "identifier" > L2</ span >< span class = "special" > ,</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 1</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 2</ span >< span class = "special" > ]> ;</ span > < span class = "comment" > // mp_list< void, char[1], char[2]> </ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_rename_l_y" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_rename_l_y" title = "mp_rename<L, Y>" >< code class = "computeroutput" >< span class = "identifier" > mp_rename</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span >
< span class = "identifier" > Y</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > Y</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_rename</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_rename</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > Y</ span >< span class = "special" > > </ span ></ code > changes the type of the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > to < code class = "computeroutput" >< span class = "identifier" > Y</ span ></ code > .
That is, < code class = "computeroutput" >< span class = "identifier" > mp_rename</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > Y</ span >< span class = "special" > > </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > Y</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > .
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "keyword" > double</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span > < span class = "keyword" > double</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_rename</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > > ;</ span > < span class = "comment" > // std::tuple< double, long double> </ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L2</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > void</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_rename</ span >< span class = "special" > < </ span >< span class = "identifier" > L2</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_list< void> </ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.list.mp_apply_f_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_apply_f_l" title = "mp_apply<F, L>" >< code class = "computeroutput" >< span class = "identifier" > mp_apply</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span >
< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_apply</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_rename</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > > ;</ span >
</ pre >
< p >
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< code class = "computeroutput" >< span class = "identifier" > mp_apply</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code > applies the metafunction < code class = "computeroutput" >< span class = "identifier" > F</ span ></ code > to the contents of the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > , that is, < code class = "computeroutput" >< span class = "identifier" > mp_apply</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...>> </ span ></ code >
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is an alias for < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > .
(< code class = "computeroutput" >< span class = "identifier" > mp_apply</ span ></ code > is the same as
< code class = "computeroutput" >< span class = "identifier" > mp_rename</ span ></ code > with the arguments
reversed.)
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "keyword" > double</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span > < span class = "keyword" > double</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_apply</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > is_same</ span >< span class = "special" > ,</ span > < span class = "identifier" > L1</ span >< span class = "special" > > ;</ span > < span class = "comment" > // std::is_same< double, long double> </ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.list.mp_apply_q_q_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_apply_q_q_l" title = "mp_apply_q<Q, L>" >< code class = "computeroutput" >< span class = "identifier" > mp_apply_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span >
< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_apply_q</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_apply</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ::</ span >< span class = "keyword" > template</ span > < span class = "identifier" > fn</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > > ;</ span >
</ pre >
< p >
Same as < code class = "computeroutput" >< span class = "identifier" > mp_apply</ span ></ code > , but takes
a quoted metafunction.
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > double</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span > < span class = "keyword" > double</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_apply_q</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_bind_front</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_push_back</ span >< span class = "special" > ,</ span > < span class = "identifier" > L1</ span >< span class = "special" > > ,</ span > < span class = "identifier" > L2</ span >< span class = "special" > > ;</ span > < span class = "comment" > // std::tuple< double, long double, int, long> </ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.list.mp_append_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_append_l" title = "mp_append<L...>" >< code class = "computeroutput" >< span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_append</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code >
concatenates the lists in < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > ...</ span ></ code > into a single list that has the same
type as the first list. < code class = "computeroutput" >< span class = "identifier" > mp_append</ span >< span class = "special" > <> </ span ></ code > is an alias for < code class = "computeroutput" >< span class = "identifier" > mp_list</ span >< span class = "special" > <> </ span ></ code > . < code class = "computeroutput" >< span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > L2</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > ...> ,</ span > < span class = "special" > ...,</ span >
< span class = "identifier" > Ln</ span >< span class = "special" > < </ span >< span class = "identifier" > Tn</ span >< span class = "special" > ...>> </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > L1</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ...,</ span > < span class = "identifier" > T2</ span >< span class = "special" > ...,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > Tn</ span >< span class = "special" > ...> </ span ></ code > .
</ p >
2017-05-17 20:47:25 +03:00
< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > double</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span > < span class = "keyword" > double</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L3</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "keyword" > short</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L4</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > <> ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > ,</ span > < span class = "identifier" > L2</ span >< span class = "special" > ,</ span > < span class = "identifier" > L3</ span >< span class = "special" > ,</ span > < span class = "identifier" > L4</ span >< span class = "special" > > ;</ span > < span class = "comment" > // std::tuple< double, long double, int, short, long> </ span >
</ pre >
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</ div >
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< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_replace_front_l_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_replace_front_l_t" title = "mp_replace_front<L, T>" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_replace_front</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_replace_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code > replaces the first element of the list
< code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > with < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > .
That is, < code class = "computeroutput" >< span class = "identifier" > mp_replace_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U1</ span >< span class = "special" > ,</ span > < span class = "identifier" > U</ span >< span class = "special" > ...> ,</ span >
< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code > .
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_replace_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // std::pair< void, float> </ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L2</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > ,</ span > < span class = "keyword" > double</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span > < span class = "keyword" > double</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_replace_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L2</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // std::tuple< void, double, long double> </ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 1</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 2</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 3</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 4</ span >< span class = "special" > ]> ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_replace_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L3</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_list< void, char[2], char[3], char[4]> ;</ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_replace_first_l_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_replace_first_l_t" title = "mp_replace_first<L, T>" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_first</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_replace_first</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_replace_front</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_replace_first</ span ></ code > is another
name for < code class = "computeroutput" >< span class = "identifier" > mp_replace_front</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_replace_second_l_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_replace_second_l_t" title = "mp_replace_second<L, T>" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_replace_second</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_replace_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code > replaces the second element of the
list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > with < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > . That is, < code class = "computeroutput" >< span class = "identifier" > mp_replace_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U1</ span >< span class = "special" > ,</ span > < span class = "identifier" > U2</ span >< span class = "special" > ,</ span > < span class = "identifier" > U</ span >< span class = "special" > ...> ,</ span >
< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code > .
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > pair</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > float</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_replace_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // std::pair< int, void> </ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L2</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > ,</ span > < span class = "keyword" > double</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span > < span class = "keyword" > double</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_replace_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L2</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // std::tuple< float, void, long double> </ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 1</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 2</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 3</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 4</ span >< span class = "special" > ]> ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_replace_second</ span >< span class = "special" > < </ span >< span class = "identifier" > L3</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_list< char[1], void, char[3], char[4]> ;</ span >
</ pre >
2017-03-18 20:36:58 +02:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.list.mp_replace_third_l_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.list.mp_replace_third_l_t" title = "mp_replace_third<L, T>" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_third</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_replace_third</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_replace_third</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code > replaces the third element of the list
< code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > with < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > .
That is, < code class = "computeroutput" >< span class = "identifier" > mp_replace_third</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U1</ span >< span class = "special" > ,</ span > < span class = "identifier" > U2</ span >< span class = "special" > ,</ span > < span class = "identifier" > U3</ span >< span class = "special" > ,</ span > < span class = "identifier" > U</ span >< span class = "special" > ...> ,</ span >
< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U1</ span >< span class = "special" > ,</ span > < span class = "identifier" > U2</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code > .
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > L1</ span > < span class = "special" > =</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > ,</ span > < span class = "keyword" > double</ span >< span class = "special" > ,</ span > < span class = "keyword" > long</ span > < span class = "keyword" > double</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_replace_third</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // std::tuple< float, double, void> </ span >
< span class = "keyword" > using</ span > < span class = "identifier" > L2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 1</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 2</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 3</ span >< span class = "special" > ],</ span > < span class = "keyword" > char</ span >< span class = "special" > [</ span >< span class = "number" > 4</ span >< span class = "special" > ]> ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_replace_third</ span >< span class = "special" > < </ span >< span class = "identifier" > L2</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_list< char[1], char[2], void, char[4]> ;</ span >
</ pre >
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</ div >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
< a name = "mp11.reference.utility" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility" title = "Utility Components, <boost/mp11/utility.hpp>" > Utility Components, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > utility</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a >
</ h3 ></ div ></ div ></ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.utility.mp_identity_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_identity_t" title = "mp_identity<T>" >< code class = "computeroutput" >< span class = "identifier" > mp_identity</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > struct</ span > < span class = "identifier" > mp_identity</ span >
< span class = "special" > {</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > type</ span > < span class = "special" > =</ span > < span class = "identifier" > T</ span >< span class = "special" > ;</ span >
< span class = "special" > };</ span >
</ pre >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.utility.mp_identity_t_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_identity_t_t" title = "mp_identity_t<T>" >< code class = "computeroutput" >< span class = "identifier" > mp_identity_t</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_identity_t</ span > < span class = "special" > =</ span > < span class = "identifier" > T</ span >< span class = "special" > ;</ span >
</ pre >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.utility.mp_inherit_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_inherit_t" title = "mp_inherit<T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_inherit</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > struct</ span > < span class = "identifier" > mp_inherit</ span >< span class = "special" > :</ span > < span class = "identifier" > T</ span >< span class = "special" > ...</ span > < span class = "special" > {};</ span >
</ pre >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.utility.mp_if_c_c_t_e" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_if_c_c_t_e" title = "mp_if_c<C, T, E...>" >< code class = "computeroutput" >< span class = "identifier" > mp_if_c</ span >< span class = "special" > < </ span >< span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > E</ span >< span class = "special" > ...> </ span ></ code ></ a >
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</ h4 ></ div ></ div ></ div >
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< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > bool</ span > < span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > E</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_if_c</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
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</ pre >
< p >
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< code class = "computeroutput" >< span class = "identifier" > mp_if_c</ span >< span class = "special" > < </ span >< span class = "keyword" > true</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > E</ span >< span class = "special" > ...> </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > . < code class = "computeroutput" >< span class = "identifier" > mp_if_c</ span >< span class = "special" > < </ span >< span class = "keyword" > false</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > E</ span >< span class = "special" > > </ span ></ code > is an alias for < code class = "computeroutput" >< span class = "identifier" > E</ span ></ code > .
Otherwise, the result is a substitution failure.
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</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_if_c</ span >< span class = "special" > < </ span >< span class = "keyword" > true</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // int</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_if_c</ span >< span class = "special" > < </ span >< span class = "identifier" > flase</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // void</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > I</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > void_if_5</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_if_c</ span >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span > < span class = "special" > ==</ span > < span class = "number" > 5</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // `void` when `I::value` is 5, substitution failure otherwise</ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.utility.mp_if_c_t_e" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_if_c_t_e" title = "mp_if<C, T, E...>" >< code class = "computeroutput" >< span class = "identifier" > mp_if</ span >< span class = "special" > < </ span >< span class = "identifier" > C</ span >< span class = "special" > ,</ span >
< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > E</ span >< span class = "special" > ...> </ span ></ code ></ a >
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</ h4 ></ div ></ div ></ div >
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< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > E</ span >< span class = "special" > ...> </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_if</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_if_c</ span >< span class = "special" > < </ span >< span class = "keyword" > static_cast</ span >< span class = "special" > < </ span >< span class = "keyword" > bool</ span >< span class = "special" > > (</ span >< span class = "identifier" > C</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > ),</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > E</ span >< span class = "special" > ...> ;</ span >
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</ pre >
< p >
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Like < code class = "computeroutput" >< span class = "identifier" > mp_if_c</ span ></ code > , but the first
argument is a type.
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</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.utility.mp_eval_if_c_c_t_f_u" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_eval_if_c_c_t_f_u" title = "mp_eval_if_c<C, T, F, U...>" >< code class = "computeroutput" >< span class = "identifier" > mp_eval_if_c</ span >< span class = "special" > < </ span >< span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span >
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< span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > bool</ span > < span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > U</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_eval_if_c</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
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< code class = "computeroutput" >< span class = "identifier" > mp_eval_if_c</ span >< span class = "special" > < </ span >< span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span >
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< span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > when
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< code class = "computeroutput" >< span class = "identifier" > C</ span ></ code > is < code class = "computeroutput" >< span class = "keyword" > true</ span ></ code > ,
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for < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code >
otherwise. Its purpose is to avoid evaluating < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code > when the condition is < code class = "computeroutput" >< span class = "keyword" > true</ span ></ code > as it may not be valid in this case.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.utility.mp_eval_if_c_t_f_u" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_eval_if_c_t_f_u" title = "mp_eval_if<C, T, F, U...>" >< code class = "computeroutput" >< span class = "identifier" > mp_eval_if</ span >< span class = "special" > < </ span >< span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span >
< span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > U</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_eval_if</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_eval_if_c</ span >< span class = "special" > < </ span >< span class = "keyword" > static_cast</ span >< span class = "special" > < </ span >< span class = "keyword" > bool</ span >< span class = "special" > > (</ span >< span class = "identifier" > C</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > ),</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > U</ span >< span class = "special" > ...> ;</ span >
</ pre >
< p >
Like < code class = "computeroutput" >< span class = "identifier" > mp_eval_if_c</ span ></ code > , but
the first argument is a type.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.utility.mp_eval_if_q_c_t_q_u" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_eval_if_q_c_t_q_u" title = "mp_eval_if_q<C, T, Q, U...>" >< code class = "computeroutput" >< span class = "identifier" > mp_eval_if_q</ span >< span class = "special" > < </ span >< span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > Q</ span >< span class = "special" > ,</ span >
< span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > U</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_eval_if_q</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_eval_if</ span >< span class = "special" > < </ span >< span class = "identifier" > C</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > Q</ span >< span class = "special" > ::</ span >< span class = "keyword" > template</ span > < span class = "identifier" > fn</ span >< span class = "special" > ,</ span > < span class = "identifier" > U</ span >< span class = "special" > ...> ;</ span >
</ pre >
< p >
Like < code class = "computeroutput" >< span class = "identifier" > mp_eval_if</ span ></ code > , but takes
a quoted metafunction.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.utility.mp_valid_f_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_valid_f_t" title = "mp_valid<F, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_valid</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_valid</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_valid</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > is an alias for < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code >
when < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code >
is a valid expression, for < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code >
otherwise.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.utility.mp_defer_f_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_defer_f_t" title = "mp_defer<F, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_defer</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_defer</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
When < code class = "computeroutput" >< span class = "identifier" > mp_valid</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > mp_defer</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > is a struct with a nested type
< code class = "computeroutput" >< span class = "identifier" > type</ span ></ code > which is an alias
for < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > .
Otherwise, < code class = "computeroutput" >< span class = "identifier" > mp_defer</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > is an empty struct.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.utility.mp_quote_f" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_quote_f" title = "mp_quote<F>" >< code class = "computeroutput" >< span class = "identifier" > mp_quote</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code ></ a >
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</ h4 ></ div ></ div ></ div >
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< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span > < span class = "keyword" > struct</ span > < span class = "identifier" > mp_quote</ span >
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< span class = "special" > {</ span >
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< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > fn</ span > < span class = "special" > =</ span > < span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> ;</ span >
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< span class = "special" > };</ span >
</ pre >
< p >
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< code class = "computeroutput" >< span class = "identifier" > mp_quote</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code >
transforms the template < code class = "computeroutput" >< span class = "identifier" > F</ span ></ code >
into a type with a nested template < code class = "computeroutput" >< span class = "identifier" > fn</ span ></ code >
such that < code class = "computeroutput" >< span class = "identifier" > fn</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code >
returns < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > .
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</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.utility.mp_invoke_q_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_invoke_q_t" title = "mp_invoke<Q, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_invoke</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
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</ h4 ></ div ></ div ></ div >
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< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_invoke</ span > < span class = "special" > =</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > Q</ span >< span class = "special" > ::</ span >< span class = "keyword" > template</ span > < span class = "identifier" > fn</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> ;</ span >
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</ pre >
< p >
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< code class = "computeroutput" >< span class = "identifier" > mp_invoke</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > evaluates the nested template < code class = "computeroutput" >< span class = "identifier" > fn</ span ></ code > of a quoted metafunction. < code class = "computeroutput" >< span class = "identifier" > mp_invoke</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_quote</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code >
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returns < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > .
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</ p >
</ div >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
< a name = "mp11.reference.algorithm" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm" title = "Algorithms, <boost/mp11/algorithm.hpp>" > Algorithms, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > algorithm</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a >
</ h3 ></ div ></ div ></ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_assign_l1_l2" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_assign_l1_l2" title = "mp_assign<L1, L2>" >< code class = "computeroutput" >< span class = "identifier" > mp_assign</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > ,</ span > < span class = "identifier" > L2</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L1</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > L2</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_assign</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_assign</ span >< span class = "special" > < </ span >< span class = "identifier" > L1</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ...> ,</ span >
< span class = "identifier" > L2</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > ...>> </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > L1</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > ...> </ span ></ code > .
That is, it replaces the elements of < code class = "computeroutput" >< span class = "identifier" > L1</ span ></ code >
with those of < code class = "computeroutput" >< span class = "identifier" > L2</ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_clear_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_clear_l" title = "mp_clear<L>" >< code class = "computeroutput" >< span class = "identifier" > mp_clear</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_clear</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_assign</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_list</ span >< span class = "special" > <>> ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_clear</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...>> </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > <> </ span ></ code > ,
that is, it removes the elements of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_transform_f_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_transform_f_l" title = "mp_transform<F, L...>" >< code class = "computeroutput" >< span class = "identifier" > mp_transform</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_transform</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_transform</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > L1</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > L2</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > ...> ,</ span > < span class = "special" > ...,</ span >
< span class = "identifier" > Ln</ span >< span class = "special" > < </ span >< span class = "identifier" > Tn</ span >< span class = "special" > ...>> </ span ></ code >
applies < code class = "computeroutput" >< span class = "identifier" > F</ span ></ code > to each successive
tuple of elements and returns < code class = "computeroutput" >< span class = "identifier" > L1</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > Tn</ span >< span class = "special" > > ...> </ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.algorithm.mp_transform_q_q_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_transform_q_q_l" title = "mp_transform_q<Q, L...>" >< code class = "computeroutput" >< span class = "identifier" > mp_transform_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_transform_q</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_transform</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ::</ span >< span class = "keyword" > template</ span > < span class = "identifier" > fn</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> ;</ span >
</ pre >
< p >
As < code class = "computeroutput" >< span class = "identifier" > mp_transform</ span ></ code > , but takes
a quoted metafunction.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.algorithm.mp_transform_if_p_f_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_transform_if_p_f_l" title = "mp_transform_if<P, F, L...>" >< code class = "computeroutput" >< span class = "identifier" > mp_transform_if</ span >< span class = "special" > < </ span >< span class = "identifier" > P</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a >
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</ h4 ></ div ></ div ></ div >
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< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > P</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_transform_if</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
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</ pre >
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< p >
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< code class = "computeroutput" >< span class = "identifier" > mp_transform_if</ span >< span class = "special" > < </ span >< span class = "identifier" > P</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > L1</ span >< span class = "special" > ,</ span > < span class = "identifier" > L2</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > Ln</ span >< span class = "special" > > </ span ></ code >
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replaces the elements of the list < code class = "computeroutput" >< span class = "identifier" > L1</ span ></ code >
for which < code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > P</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > Tn</ span >< span class = "special" > >> </ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code >
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with < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > Tn</ span >< span class = "special" > > </ span ></ code > , and returns the result, where < code class = "computeroutput" >< span class = "identifier" > Ti</ span ></ code > are the corresponding elements of
< code class = "computeroutput" >< span class = "identifier" > Li</ span ></ code > .
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</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.algorithm.mp_transform_if_q_qp_qf_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_transform_if_q_qp_qf_l" title = "mp_transform_if_q<Qp, Qf, L...>" >< code class = "computeroutput" >< span class = "identifier" > mp_transform_if_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Qp</ span >< span class = "special" > ,</ span > < span class = "identifier" > Qf</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > Qp</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > Qf</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_transform_if_q</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_transform_if</ span >< span class = "special" > < </ span >< span class = "identifier" > Qp</ span >< span class = "special" > ::</ span >< span class = "keyword" > template</ span > < span class = "identifier" > fn</ span >< span class = "special" > ,</ span > < span class = "identifier" > Qf</ span >< span class = "special" > ::</ span >< span class = "keyword" > template</ span > < span class = "identifier" > fn</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> ;</ span >
</ pre >
< p >
As < code class = "computeroutput" >< span class = "identifier" > mp_transform_if</ span ></ code > , but
takes a quoted metafunction.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.algorithm.mp_fill_l_v" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_fill_l_v" title = "mp_fill<L, V>" >< code class = "computeroutput" >< span class = "identifier" > mp_fill</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_fill</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_fill</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code >
returns < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code > ,
with the result having the same size as the input.
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_count_l_v" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_count_l_v" title = "mp_count<L, V>" >< code class = "computeroutput" >< span class = "identifier" > mp_count</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_count</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_count</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code > returns < code class = "computeroutput" >< span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code > , where < code class = "computeroutput" >< span class = "identifier" > N</ span ></ code >
is the number of elements of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code >
same as < code class = "computeroutput" >< span class = "identifier" > V</ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_count_if_l_p" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_count_if_l_p" title = "mp_count_if<L, P>" >< code class = "computeroutput" >< span class = "identifier" > mp_count_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_count_if</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
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< code class = "computeroutput" >< span class = "identifier" > mp_count_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code > returns < code class = "computeroutput" >< span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code > , where < code class = "computeroutput" >< span class = "identifier" > N</ span ></ code >
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is the number of elements < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code >
of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > for which < code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > P</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > >> </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_contains_l_v" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_contains_l_v" title = "mp_contains<L, V>" >< code class = "computeroutput" >< span class = "identifier" > mp_contains</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_contains</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_to_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_count</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > >> ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_contains</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code >
when < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > contains an element
< code class = "computeroutput" >< span class = "identifier" > V</ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code >
otherwise.
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_repeat_c_l_n" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_repeat_c_l_n" title = "mp_repeat_c<L, N>" >< code class = "computeroutput" >< span class = "identifier" > mp_repeat_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_repeat_c</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_repeat_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code > returns a list of the same type as
< code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > that consists of < code class = "computeroutput" >< span class = "identifier" > N</ span ></ code > concatenated copies of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_repeat_l_n" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_repeat_l_n" title = "mp_repeat<L, N>" >< code class = "computeroutput" >< span class = "identifier" > mp_repeat</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_repeat</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
Same as < code class = "computeroutput" >< span class = "identifier" > mp_repeat_c</ span ></ code > but
with a type argument < code class = "computeroutput" >< span class = "identifier" > N</ span ></ code > .
The number of copies is < code class = "computeroutput" >< span class = "identifier" > N</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span ></ code >
and must be nonnegative.
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_product_f_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_product_f_l" title = "mp_product<F, L...>" >< code class = "computeroutput" >< span class = "identifier" > mp_product</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_product</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_product</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > L1</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > L2</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > ...> ,</ span > < span class = "special" > ...,</ span >
< span class = "identifier" > Ln</ span >< span class = "special" > < </ span >< span class = "identifier" > Tn</ span >< span class = "special" > ...>> </ span ></ code >
evaluates < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > U1</ span >< span class = "special" > ,</ span > < span class = "identifier" > U2</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > Un</ span >< span class = "special" > > </ span ></ code > for values < code class = "computeroutput" >< span class = "identifier" > Ui</ span ></ code >
taken from the Cartesian product of the lists, as if the elements < code class = "computeroutput" >< span class = "identifier" > Ui</ span ></ code > are formed by < code class = "computeroutput" >< span class = "identifier" > n</ span ></ code >
nested loops, each traversing < code class = "computeroutput" >< span class = "identifier" > Li</ span ></ code > .
It returns a list of type < code class = "computeroutput" >< span class = "identifier" > L1</ span ></ code >
containing the results of the application of < code class = "computeroutput" >< span class = "identifier" > F</ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.algorithm.mp_product_q_q_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_product_q_q_l" title = "mp_product_q<Q, L...>" >< code class = "computeroutput" >< span class = "identifier" > mp_product_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_product_q</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_product</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ::</ span >< span class = "keyword" > template</ span > < span class = "identifier" > fn</ span >< span class = "special" > ,</ span > < span class = "identifier" > L</ span >< span class = "special" > ...> ;</ span >
</ pre >
< p >
As < code class = "computeroutput" >< span class = "identifier" > mp_product</ span ></ code > , but takes
a quoted metafunction.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.algorithm.mp_drop_c_l_n" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_drop_c_l_n" title = "mp_drop_c<L, N>" >< code class = "computeroutput" >< span class = "identifier" > mp_drop_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_drop_c</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_drop_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code > removes the first < code class = "computeroutput" >< span class = "identifier" > N</ span ></ code >
elements of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > and returns
the result.
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_drop_l_n" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_drop_l_n" title = "mp_drop<L, N>" >< code class = "computeroutput" >< span class = "identifier" > mp_drop</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_drop</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
Same as < code class = "computeroutput" >< span class = "identifier" > mp_drop_c</ span ></ code > , but
with a type argument < code class = "computeroutput" >< span class = "identifier" > N</ span ></ code > .
< code class = "computeroutput" >< span class = "identifier" > N</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span ></ code > must be a nonnegative number.
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.algorithm.mp_iota_c_n" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_iota_c_n" title = "mp_iota_c<N>" >< code class = "computeroutput" >< span class = "identifier" > mp_iota_c</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a >
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</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_iota_c</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_iota_c</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "number" > 0</ span >< span class = "special" > > ,</ span >
< span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "number" > 1</ span >< span class = "special" > > ,</ span > < span class = "special" > ...,</ span >
< span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > -</ span >< span class = "number" > 1</ span >< span class = "special" > >> </ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.algorithm.mp_iota_n" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_iota_n" title = "mp_iota<N>" >< code class = "computeroutput" >< span class = "identifier" > mp_iota</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a >
2017-03-14 22:57:07 +02:00
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_iota</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
2017-03-15 19:43:06 +02:00
< p >
Same as < code class = "computeroutput" >< span class = "identifier" > mp_iota_c</ span ></ code > , but
with a type argument < code class = "computeroutput" >< span class = "identifier" > N</ span ></ code > .
< code class = "computeroutput" >< span class = "identifier" > N</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span ></ code > must be a nonnegative number. Returns
< code class = "computeroutput" >< span class = "identifier" > mp_list</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > integral_constant</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "number" > 0</ span >< span class = "special" > > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > integral_constant</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "number" > 1</ span >< span class = "special" > > ,</ span >
< span class = "special" > ...,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > integral_constant</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span >< span class = "special" > -</ span >< span class = "number" > 1</ span >< span class = "special" > >> </ span ></ code >
where < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > is the type of
< code class = "computeroutput" >< span class = "identifier" > N</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span ></ code > .
</ p >
2017-03-14 22:57:07 +02:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_at_c_l_i" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_at_c_l_i" title = "mp_at_c<L, I>" >< code class = "computeroutput" >< span class = "identifier" > mp_at_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "identifier" > I</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_at_c</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_at_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > > </ span ></ code > returns the < code class = "computeroutput" >< span class = "identifier" > I</ span ></ code > th
element of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > , zero-based.
</ p >
2017-03-14 22:57:07 +02:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_at_l_i" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_at_l_i" title = "mp_at<L, I>" >< code class = "computeroutput" >< span class = "identifier" > mp_at</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span >
< span class = "identifier" > I</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > I</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_at</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
2017-03-15 19:43:06 +02:00
< p >
Same as < code class = "computeroutput" >< span class = "identifier" > mp_at_c</ span ></ code > , but with
a type argument < code class = "computeroutput" >< span class = "identifier" > I</ span ></ code > . < code class = "computeroutput" >< span class = "identifier" > I</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span ></ code >
must be a nonnegative number.
</ p >
2017-03-14 22:57:07 +02:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_take_c_l_n" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_take_c_l_n" title = "mp_take_c<L, N>" >< code class = "computeroutput" >< span class = "identifier" > mp_take_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_take_c</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
2017-03-15 19:43:06 +02:00
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_take_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code > returns a list of the same type as
< code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > containing the first
< code class = "computeroutput" >< span class = "identifier" > N</ span ></ code > elements of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > .
</ p >
2017-03-14 22:57:07 +02:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_take_l_n" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_take_l_n" title = "mp_take<L, N>" >< code class = "computeroutput" >< span class = "identifier" > mp_take</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_take</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
2017-03-15 19:43:06 +02:00
< p >
Same as < code class = "computeroutput" >< span class = "identifier" > mp_take_c</ span ></ code > , but
with a type argument < code class = "computeroutput" >< span class = "identifier" > N</ span ></ code > .
< code class = "computeroutput" >< span class = "identifier" > N</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span ></ code > must be a nonnegative number.
</ p >
2017-03-14 22:57:07 +02:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
2017-05-13 21:52:56 +03:00
< a name = "mp11.reference.algorithm.mp_insert_c_l_i_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_insert_c_l_i_t" title = "mp_insert_c<L, I, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_insert_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_insert_c</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_take_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > > ,</ span > < span class = "identifier" > mp_push_front</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_drop_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...>> ;</ span >
</ pre >
< p >
Inserts the elements < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code > into the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code >
at position < code class = "computeroutput" >< span class = "identifier" > I</ span ></ code > (a zero-based
index).
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_insert_l_i_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_insert_l_i_t" title = "mp_insert<L, I, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_insert</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_insert</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_take</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > > ,</ span > < span class = "identifier" > mp_push_front</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_drop</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...>> ;</ span >
</ pre >
< p >
Same as < code class = "computeroutput" >< span class = "identifier" > mp_insert_c</ span ></ code > , but
with a type argument < code class = "computeroutput" >< span class = "identifier" > I</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_erase_c_l_i_j" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_erase_c_l_i_j" title = "mp_erase_c<L, I, J>" >< code class = "computeroutput" >< span class = "identifier" > mp_erase_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > J</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "identifier" > J</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_erase</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_take_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > > ,</ span > < span class = "identifier" > mp_drop_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > J</ span >< span class = "special" > >> ;</ span >
</ pre >
< p >
Removes from the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code >
the elements with indices from < code class = "computeroutput" >< span class = "identifier" > I</ span ></ code >
(inclusive) to < code class = "computeroutput" >< span class = "identifier" > J</ span ></ code > (exclusive).
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_erase_l_i_j" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_erase_l_i_j" title = "mp_erase<L, I, J>" >< code class = "computeroutput" >< span class = "identifier" > mp_erase</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > J</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > J</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_erase</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_append</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_take</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > > ,</ span > < span class = "identifier" > mp_drop</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > J</ span >< span class = "special" > >> ;</ span >
</ pre >
< p >
Same as < code class = "computeroutput" >< span class = "identifier" > mp_erase_c</ span ></ code > , but
with a type arguments < code class = "computeroutput" >< span class = "identifier" > I</ span ></ code >
and < code class = "computeroutput" >< span class = "identifier" > J</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.algorithm.mp_replace_l_v_w" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_replace_l_v_w" title = "mp_replace<L, V, W>" >< code class = "computeroutput" >< span class = "identifier" > mp_replace</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "identifier" > W</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > W</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_replace</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
2017-03-15 19:43:06 +02:00
< p >
Replaces all < code class = "computeroutput" >< span class = "identifier" > V</ span ></ code > elements
of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > with < code class = "computeroutput" >< span class = "identifier" > W</ span ></ code > and returns the result.
</ p >
2017-03-14 22:57:07 +02:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_replace_if_l_p_w" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_replace_if_l_p_w" title = "mp_replace_if<L, P, W>" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > ,</ span > < span class = "identifier" > W</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > P</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > W</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_replace_if</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
2017-03-15 19:43:06 +02:00
< p >
Replaces all < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > elements
of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > for which < code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > P</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > >> </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > with < code class = "computeroutput" >< span class = "identifier" > W</ span ></ code > and returns the result.
</ p >
2017-03-14 22:57:07 +02:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.algorithm.mp_replace_at_c_l_i_w" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_replace_at_c_l_i_w" title = "mp_replace_at_c<L, I, W>" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_at_c</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > W</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > W</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_replace_at_c</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
Replaces the element of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code >
at zero-based index < code class = "computeroutput" >< span class = "identifier" > I</ span ></ code > with
< code class = "computeroutput" >< span class = "identifier" > W</ span ></ code > and returns the result.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_replace_at_l_i_w" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_replace_at_l_i_w" title = "mp_replace_at<L, I, W>" >< code class = "computeroutput" >< span class = "identifier" > mp_replace_at</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > W</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > W</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_replace_at</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
Same as < code class = "computeroutput" >< span class = "identifier" > mp_replace_at_c</ span ></ code > ,
but with a type argument < code class = "computeroutput" >< span class = "identifier" > I</ span ></ code > .
< code class = "computeroutput" >< span class = "identifier" > I</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span ></ code > must be a nonnegative number.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
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< a name = "mp11.reference.algorithm.mp_copy_if_l_p" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_copy_if_l_p" title = "mp_copy_if<L, P>" >< code class = "computeroutput" >< span class = "identifier" > mp_copy_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_copy_if</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
Copies the elements < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > of
< code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > for which < code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > P</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > >> </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > to a new list
of the same type and returns it.
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_remove_l_v" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_remove_l_v" title = "mp_remove<L, V>" >< code class = "computeroutput" >< span class = "identifier" > mp_remove</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_remove</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
Removes all < code class = "computeroutput" >< span class = "identifier" > V</ span ></ code > elements
of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > and returns the result.
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_remove_if_l_p" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_remove_if_l_p" title = "mp_remove_if<L, P>" >< code class = "computeroutput" >< span class = "identifier" > mp_remove_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_remove_if</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
Removes all elements < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code >
of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > for which < code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > P</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > >> </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > and returns
the result.
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_partition_l_p" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_partition_l_p" title = "mp_partition<L, P>" >< code class = "computeroutput" >< span class = "identifier" > mp_partition</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_partition</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_partition</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code >
partitions < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > into two lists
< code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U1</ span >< span class = "special" > ...> </ span ></ code >
and < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U2</ span >< span class = "special" > ...> </ span ></ code >
such that < code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > P</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > >> </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > for the elements
of < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U1</ span >< span class = "special" > ...> </ span ></ code >
and < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code > for the elements
of < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U2</ span >< span class = "special" > ...> </ span ></ code > .
Returns < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U1</ span >< span class = "special" > ...> ,</ span >
< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > U2</ span >< span class = "special" > ...>> </ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_sort_l_p" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_sort_l_p" title = "mp_sort<L, P>" >< code class = "computeroutput" >< span class = "identifier" > mp_sort</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_sort</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_sort</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code > sorts the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code >
according to the strict weak ordering < code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > P</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > U</ span >< span class = "special" > >> </ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_find_l_v" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_find_l_v" title = "mp_find<L, V>" >< code class = "computeroutput" >< span class = "identifier" > mp_find</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
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< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_find</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
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</ pre >
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< p >
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< code class = "computeroutput" >< span class = "identifier" > mp_find</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code > returns the index at which the type
< code class = "computeroutput" >< span class = "identifier" > V</ span ></ code > is located in the list
< code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > . It's an alias for < code class = "computeroutput" >< span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > > </ span ></ code > ,
where < code class = "computeroutput" >< span class = "identifier" > I</ span ></ code > is the zero-based
index of the first occurence of < code class = "computeroutput" >< span class = "identifier" > V</ span ></ code >
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in < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > . If < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > does not contain < code class = "computeroutput" >< span class = "identifier" > V</ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > mp_find</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > mp_size</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_find_if_l_p" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_find_if_l_p" title = "mp_find_if<L, P>" >< code class = "computeroutput" >< span class = "identifier" > mp_find_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
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< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_find_if</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
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</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_find_f</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code > is an alias for < code class = "computeroutput" >< span class = "identifier" > mp_size_t</ span >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > > </ span ></ code > , where < code class = "computeroutput" >< span class = "identifier" > I</ span ></ code >
is the zero-based index of the first element < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code >
in < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > for which < code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > P</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > >> </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > . If there is
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no such element, < code class = "computeroutput" >< span class = "identifier" > mp_find_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code >
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is < code class = "computeroutput" >< span class = "identifier" > mp_size</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_reverse_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_reverse_l" title = "mp_reverse<L>" >< code class = "computeroutput" >< span class = "identifier" > mp_reverse</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_reverse</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_reverse</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > Tn</ span >< span class = "special" > >> </ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > Tn</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "identifier" > T1</ span >< span class = "special" > > </ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_fold_l_v_f" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_fold_l_v_f" title = "mp_fold<L, V, F>" >< code class = "computeroutput" >< span class = "identifier" > mp_fold</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_fold</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_fold</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > Tn</ span >< span class = "special" > > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >
< span class = "identifier" > F</ span >< span class = "special" > < </ span >
< span class = "identifier" > F</ span >< span class = "special" > < </ span >
< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "identifier" > T1</ span >< span class = "special" > > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > > ,</ span > < span class = "special" > ...> ,</ span >
< span class = "identifier" > Tn</ span >< span class = "special" > > </ span ></ code > ,
or < code class = "computeroutput" >< span class = "identifier" > V</ span ></ code > , if < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > is empty.
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_reverse_fold_l_v_f" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_reverse_fold_l_v_f" title = "mp_reverse_fold<L, V, F>" >< code class = "computeroutput" >< span class = "identifier" > mp_reverse_fold</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_reverse_fold</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_reverse_fold</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > Tn</ span >< span class = "special" > > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T1</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T2</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > < ...,</ span > < span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > Tn</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > >>>> </ span ></ code > ,
or < code class = "computeroutput" >< span class = "identifier" > V</ span ></ code > , if < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > is empty.
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_unique_l" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_unique_l" title = "mp_unique<L>" >< code class = "computeroutput" >< span class = "identifier" > mp_unique</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_unique</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_unique</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > </ span ></ code >
returns a list of the same type as < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code >
with the duplicate elements removed.
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_all_of_l_p" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_all_of_l_p" title = "mp_all_of<L, P>" >< code class = "computeroutput" >< span class = "identifier" > mp_all_of</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_all_of</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_bool</ span >< span class = "special" > < </ span > < span class = "identifier" > mp_count_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > ::</ span >< span class = "identifier" > value</ span > < span class = "special" > ==</ span > < span class = "identifier" > mp_size</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > ::</ span >< span class = "identifier" > value</ span > < span class = "special" > > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_all_of</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code >
when < code class = "computeroutput" >< span class = "identifier" > P</ span ></ code > holds for all elements
of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code >
otherwise. When < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > is empty,
the result is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_none_of_l_p" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_none_of_l_p" title = "mp_none_of<L, P>" >< code class = "computeroutput" >< span class = "identifier" > mp_none_of</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_none_of</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_bool</ span >< span class = "special" > < </ span > < span class = "identifier" > mp_count_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > ::</ span >< span class = "identifier" > value</ span > < span class = "special" > ==</ span > < span class = "number" > 0</ span > < span class = "special" > > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_none_of</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code >
when < code class = "computeroutput" >< span class = "identifier" > P</ span ></ code > holds for no element
of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code >
otherwise. When < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > is empty,
the result is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > .
</ p >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_any_of_l_p" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_any_of_l_p" title = "mp_any_of<L, P>" >< code class = "computeroutput" >< span class = "identifier" > mp_any_of</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_any_of</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_bool</ span >< span class = "special" > < </ span > < span class = "identifier" > mp_count_if</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > ::</ span >< span class = "identifier" > value</ span > < span class = "special" > !=</ span > < span class = "number" > 0</ span > < span class = "special" > > ;</ span >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_any_of</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "identifier" > P</ span >< span class = "special" > > </ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code >
when < code class = "computeroutput" >< span class = "identifier" > P</ span ></ code > holds for at least
one element of < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code > otherwise. When < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > is empty, the result is < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code > .
</ p >
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</ div >
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< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.algorithm.mp_for_each_l_f" ></ a >< a class = "link" href = "mp11.html#mp11.reference.algorithm.mp_for_each_l_f" title = "mp_for_each<L>(f)" >< code class = "computeroutput" >< span class = "identifier" > mp_for_each</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > (</ span >< span class = "identifier" > f</ span >< span class = "special" > )</ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > L</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span > < span class = "keyword" > constexpr</ span > < span class = "identifier" > F</ span > < span class = "identifier" > mp_for_each</ span >< span class = "special" > (</ span >< span class = "identifier" > F</ span >< span class = "special" > && </ span > < span class = "identifier" > f</ span >< span class = "special" > );</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_for_each</ span >< span class = "special" > < </ span >< span class = "identifier" > L</ span >< span class = "special" > > (</ span >< span class = "identifier" > f</ span >< span class = "special" > )</ span ></ code > calls
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< code class = "computeroutput" >< span class = "identifier" > f</ span ></ code > with < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ()</ span ></ code > for each element < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code >
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of the list < code class = "computeroutput" >< span class = "identifier" > L</ span ></ code > , in order.
</ p >
< p >
Returns < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > forward</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > (</ span >< span class = "identifier" > f</ span >< span class = "special" > )</ span ></ code > .
</ p >
</ div >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
< a name = "mp11.reference.set" ></ a >< a class = "link" href = "mp11.html#mp11.reference.set" title = "Set Operations, <boost/mp11/set.hpp>" > Set Operations, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > set</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a >
</ h3 ></ div ></ div ></ div >
< p >
A set is a list whose elements are unique.
</ p >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.set.mp_set_contains_s_v" ></ a >< a class = "link" href = "mp11.html#mp11.reference.set.mp_set_contains_s_v" title = "mp_set_contains<S, V>" >< code class = "computeroutput" >< span class = "identifier" > mp_set_contains</ span >< span class = "special" > < </ span >< span class = "identifier" > S</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > S</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_set_contains</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_set_contains</ span >< span class = "special" > < </ span >< span class = "identifier" > S</ span >< span class = "special" > ,</ span > < span class = "identifier" > V</ span >< span class = "special" > > </ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code >
if the type < code class = "computeroutput" >< span class = "identifier" > V</ span ></ code > is an element
of the set < code class = "computeroutput" >< span class = "identifier" > S</ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code > otherwise.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.set.mp_set_push_back_s_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.set.mp_set_push_back_s_t" title = "mp_set_push_back<S, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_set_push_back</ span >< span class = "special" > < </ span >< span class = "identifier" > S</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > S</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_set_push_back</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
For each < code class = "computeroutput" >< span class = "identifier" > T1</ span ></ code > in < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > mp_set_push_back</ span >< span class = "special" > < </ span >< span class = "identifier" > S</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > appends < code class = "computeroutput" >< span class = "identifier" > T1</ span ></ code >
to the end of < code class = "computeroutput" >< span class = "identifier" > S</ span ></ code > if it's
not already an element of < code class = "computeroutput" >< span class = "identifier" > S</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.set.mp_set_push_front_s_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.set.mp_set_push_front_s_t" title = "mp_set_push_front<S, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_set_push_front</ span >< span class = "special" > < </ span >< span class = "identifier" > S</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > S</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_set_push_front</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_set_push_front</ span >< span class = "special" > < </ span >< span class = "identifier" > S</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > inserts at the front of < code class = "computeroutput" >< span class = "identifier" > S</ span ></ code > those elements of < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code > for which < code class = "computeroutput" >< span class = "identifier" > S</ span ></ code >
does not already contain the same type.
</ p >
</ div >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
< a name = "mp11.reference.map" ></ a >< a class = "link" href = "mp11.html#mp11.reference.map" title = "Map Operations, <boost/mp11/map.hpp>" > Map Operations, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > map</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a >
</ h3 ></ div ></ div ></ div >
< p >
A map is a list of lists, the inner lists having at least one element (the
key.) The keys of the map must be unique.
</ p >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.map.mp_map_find_m_k" ></ a >< a class = "link" href = "mp11.html#mp11.reference.map.mp_map_find_m_k" title = "mp_map_find<M, K>" >< code class = "computeroutput" >< span class = "identifier" > mp_map_find</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span >
< span class = "identifier" > K</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > K</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_map_find</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_map_find</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > K</ span >< span class = "special" > > </ span ></ code > is an alias for the element of the
map < code class = "computeroutput" >< span class = "identifier" > M</ span ></ code > with a key < code class = "computeroutput" >< span class = "identifier" > K</ span ></ code > , or for < code class = "computeroutput" >< span class = "keyword" > void</ span ></ code > ,
if there is no such element.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.map.mp_map_contains_m_k" ></ a >< a class = "link" href = "mp11.html#mp11.reference.map.mp_map_contains_m_k" title = "mp_map_contains<M, K>" >< code class = "computeroutput" >< span class = "identifier" > mp_map_contains</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > K</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > K</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_map_contains</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_not</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > is_same</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_map_find</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > K</ span >< span class = "special" > > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > >> ;</ span >
</ pre >
< p >
2017-03-25 03:02:59 +02:00
< code class = "computeroutput" >< span class = "identifier" > mp_map_contains</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > K</ span >< span class = "special" > > </ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code >
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if the map < code class = "computeroutput" >< span class = "identifier" > M</ span ></ code > contains an
element with a key < code class = "computeroutput" >< span class = "identifier" > K</ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code > otherwise.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.map.mp_map_insert_m_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.map.mp_map_insert_m_t" title = "mp_map_insert<M, T>" >< code class = "computeroutput" >< span class = "identifier" > mp_map_insert</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_map_insert</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_if</ span >< span class = "special" > < </ span > < span class = "identifier" > mp_map_contains</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_first</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > >> ,</ span > < span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_push_back</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "special" > > ;</ span >
</ pre >
< p >
Inserts the element < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > into
the map < code class = "computeroutput" >< span class = "identifier" > M</ span ></ code > , if an element
with a key < code class = "computeroutput" >< span class = "identifier" > mp_first</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code >
is not already in < code class = "computeroutput" >< span class = "identifier" > M</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.map.mp_map_replace_m_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.map.mp_map_replace_m_t" title = "mp_map_replace<M, T>" >< code class = "computeroutput" >< span class = "identifier" > mp_map_replace</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_map_replace</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
If the map < code class = "computeroutput" >< span class = "identifier" > M</ span ></ code > does not contain
an element with a key < code class = "computeroutput" >< span class = "identifier" > mp_first</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code > , inserts it (using < code class = "computeroutput" >< span class = "identifier" > mp_push_back</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code > );
otherwise, replaces the existing element with < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.map.mp_map_update_m_t_f" ></ a >< a class = "link" href = "mp11.html#mp11.reference.map.mp_map_update_m_t_f" title = "mp_map_update<M, T, F>" >< code class = "computeroutput" >< span class = "identifier" > mp_map_update</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_map_update</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
If the map < code class = "computeroutput" >< span class = "identifier" > M</ span ></ code > does not contain
an element with a key < code class = "computeroutput" >< span class = "identifier" > mp_first</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code > , inserts it (using < code class = "computeroutput" >< span class = "identifier" > mp_push_back</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span ></ code > );
otherwise, replaces the existing element < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > X</ span >< span class = "special" > ,</ span > < span class = "identifier" > Y</ span >< span class = "special" > ...> </ span ></ code >
with < code class = "computeroutput" >< span class = "identifier" > L</ span >< span class = "special" > < </ span >< span class = "identifier" > X</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > X</ span >< span class = "special" > ,</ span > < span class = "identifier" > Y</ span >< span class = "special" > ...>> </ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.map.mp_map_erase_m_k" ></ a >< a class = "link" href = "mp11.html#mp11.reference.map.mp_map_erase_m_k" title = "mp_map_erase<M, K>" >< code class = "computeroutput" >< span class = "identifier" > mp_map_erase</ span >< span class = "special" > < </ span >< span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "identifier" > K</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > M</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > K</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_map_erase</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
If the map < code class = "computeroutput" >< span class = "identifier" > M</ span ></ code > contains an
element with a key < code class = "computeroutput" >< span class = "identifier" > K</ span ></ code > , removes
it.
</ p >
</ div >
</ div >
2017-03-16 19:45:47 +02:00
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
< a name = "mp11.reference.function" ></ a >< a class = "link" href = "mp11.html#mp11.reference.function" title = "Helper Metafunctions, <boost/mp11/function.hpp>" > Helper Metafunctions, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > function</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a >
</ h3 ></ div ></ div ></ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
2017-05-24 01:37:49 +03:00
< a name = "mp11.reference.function.mp_void_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.function.mp_void_t" title = "mp_void<T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_void</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_void</ span > < span class = "special" > =</ span > < span class = "keyword" > void</ span >< span class = "special" > ;</ span >
</ pre >
< p >
Same as < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > void_t</ span ></ code > from C++17.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
2017-03-16 19:45:47 +02:00
< a name = "mp11.reference.function.mp_and_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.function.mp_and_t" title = "mp_and<T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_and</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_and</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_and</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code >
2017-05-24 05:58:06 +03:00
applies < code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span ></ code > to the
types in < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code > ,
in order. If the result of an application is < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > mp_and</ span ></ code > returns < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code > . If the application causes a
substitution failure, returns < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code > .
If all results are < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > ,
returns < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > . < code class = "computeroutput" >< span class = "identifier" > mp_and</ span >< span class = "special" > <> </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > .
2017-03-16 19:45:47 +02:00
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_and</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_true</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_true</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_true</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_and</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_false</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_false, void is not reached</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_and</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_false</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_false</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_false</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R4</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_and</ span >< span class = "special" > < </ span >< span class = "keyword" > void</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_true</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_false (!)</ span >
</ pre >
2017-03-16 19:45:47 +02:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.function.mp_all_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.function.mp_all_t" title = "mp_all<T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_all</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_all</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_all</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > if < code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > > </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > for all types
< code class = "computeroutput" >< span class = "identifier" > U</ span ></ code > in < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code >
otherwise. Same as < code class = "computeroutput" >< span class = "identifier" > mp_and</ span ></ code > ,
but does not perform short-circuit evaluation. < code class = "computeroutput" >< span class = "identifier" > mp_and</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_false</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code > , but < code class = "computeroutput" >< span class = "identifier" > mp_all</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_false</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > </ span ></ code >
is an error because < code class = "computeroutput" >< span class = "keyword" > void</ span ></ code > does
not have a nested < code class = "computeroutput" >< span class = "identifier" > value</ span ></ code > .
The upside is that < code class = "computeroutput" >< span class = "identifier" > mp_all</ span ></ code >
2017-05-24 05:58:06 +03:00
is potentially faster and does not mask substitution failures as < code class = "computeroutput" >< span class = "identifier" > mp_and</ span ></ code > does.
2017-03-16 19:45:47 +02:00
</ p >
2017-05-24 01:37:49 +03:00
< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_and</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_true</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_true</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_true</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_and</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_false</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // compile-time error</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_and</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_false</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_false</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_false</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R4</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_and</ span >< span class = "special" > < </ span >< span class = "keyword" > void</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_true</ span >< span class = "special" > > ;</ span > < span class = "comment" > // compile-time error</ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.function.mp_or_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.function.mp_or_t" title = "mp_or<T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_or</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_or</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_or</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code >
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applies < code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span ></ code > to the
types in < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code > ,
in order. If the result of an application is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > ,
< code class = "computeroutput" >< span class = "identifier" > mp_or</ span ></ code > returns < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > . If all results are < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code > , returns < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code > .
< code class = "computeroutput" >< span class = "identifier" > mp_or</ span >< span class = "special" > <> </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code > .
2017-03-16 19:45:47 +02:00
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_or</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_true</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_false</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_true</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_or</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_true</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_true, void is not reached</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_or</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_false</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_false</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_false</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R4</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_or</ span >< span class = "special" > < </ span >< span class = "keyword" > void</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_true</ span >< span class = "special" > > ;</ span > < span class = "comment" > // compile-time error</ span >
</ pre >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.function.mp_any_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.function.mp_any_t" title = "mp_any<T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_any</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_any</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_any</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > if < code class = "computeroutput" >< span class = "identifier" > mp_to_bool</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > > </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > for any type
< code class = "computeroutput" >< span class = "identifier" > U</ span ></ code > in < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code > , < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code >
otherwise. Same as < code class = "computeroutput" >< span class = "identifier" > mp_or</ span ></ code > ,
but does not perform short-circuit evaluation.
</ p >
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< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > R1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_any</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_true</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_false</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_true</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_any</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_true</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > ;</ span > < span class = "comment" > // compile-time error</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_any</ span >< span class = "special" > < </ span >< span class = "identifier" > mp_false</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_false</ span >< span class = "special" > > ;</ span > < span class = "comment" > // mp_false</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > R4</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_any</ span >< span class = "special" > < </ span >< span class = "keyword" > void</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_true</ span >< span class = "special" > > ;</ span > < span class = "comment" > // compile-time error</ span >
</ pre >
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</ div >
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< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.function.mp_same_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.function.mp_same_t" title = "mp_same<T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_same</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_same</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_same</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > if all the types
in < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code >
are the same type, < code class = "computeroutput" >< span class = "identifier" > mp_false</ span ></ code >
otherwise. < code class = "computeroutput" >< span class = "identifier" > mp_same</ span >< span class = "special" > <> </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_true</ span ></ code > .
</ p >
</ div >
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< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.function.mp_plus_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.function.mp_plus_t" title = "mp_plus<T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_plus</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_plus</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_plus</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code >
is an integral constant type with a value that is the sum of < code class = "computeroutput" >< span class = "identifier" > U</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span ></ code >
for all types < code class = "computeroutput" >< span class = "identifier" > U</ span ></ code > in < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code > .
< code class = "computeroutput" >< span class = "identifier" > mp_plus</ span >< span class = "special" > <> </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > mp_int</ span >< span class = "special" > < </ span >< span class = "number" > 0</ span >< span class = "special" > > </ span ></ code > .
</ p >
</ div >
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</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
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< a name = "mp11.reference.bind" ></ a >< a class = "link" href = "mp11.html#mp11.reference.bind" title = "Bind, <boost/mp11/bind.hpp>" > Bind, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > bind</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a >
</ h3 ></ div ></ div ></ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.bind.mp_arg_i" ></ a >< a class = "link" href = "mp11.html#mp11.reference.bind.mp_arg_i" title = "mp_arg<I>" >< code class = "computeroutput" >< span class = "identifier" > mp_arg</ span >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "identifier" > I</ span >< span class = "special" > > </ span > < span class = "keyword" > struct</ span > < span class = "identifier" > mp_arg</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_arg</ span >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > > </ span ></ code >
is a quoted metafunction whose nested template < code class = "computeroutput" >< span class = "identifier" > fn</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > returns the < code class = "computeroutput" >< span class = "identifier" > I</ span ></ code > -th
zero-based element of < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.bind.1_9" ></ a >< a class = "link" href = "mp11.html#mp11.reference.bind.1_9" title = "_1, ..., _9" >< code class = "computeroutput" >< span class = "identifier" > _1</ span ></ code > ,
..., < code class = "computeroutput" >< span class = "identifier" > _9</ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > _1</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_arg</ span >< span class = "special" > < </ span >< span class = "number" > 0</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > _2</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_arg</ span >< span class = "special" > < </ span >< span class = "number" > 1</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > _3</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_arg</ span >< span class = "special" > < </ span >< span class = "number" > 2</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > _4</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_arg</ span >< span class = "special" > < </ span >< span class = "number" > 3</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > _5</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_arg</ span >< span class = "special" > < </ span >< span class = "number" > 4</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > _6</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_arg</ span >< span class = "special" > < </ span >< span class = "number" > 5</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > _7</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_arg</ span >< span class = "special" > < </ span >< span class = "number" > 6</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > _8</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_arg</ span >< span class = "special" > < </ span >< span class = "number" > 7</ span >< span class = "special" > > ;</ span >
< span class = "keyword" > using</ span > < span class = "identifier" > _9</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_arg</ span >< span class = "special" > < </ span >< span class = "number" > 8</ span >< span class = "special" > > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > _1</ span ></ code > to < code class = "computeroutput" >< span class = "identifier" > _9</ span ></ code >
are placeholder types, the equivalent to the placeholders of < code class = "computeroutput" >< span class = "identifier" > boost</ span >< span class = "special" > ::</ span >< span class = "identifier" > bind</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.bind.mp_bind_f_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.bind.mp_bind_f_t" title = "mp_bind<F, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_bind</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span >
< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > struct</ span > < span class = "identifier" > mp_bind</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_bind</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > is a quoted metafunction that implements
the type-based equivalent of < code class = "computeroutput" >< span class = "identifier" > boost</ span >< span class = "special" > ::</ span >< span class = "identifier" > bind</ span ></ code > .
Its nested template < code class = "computeroutput" >< span class = "identifier" > fn</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code > returns < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > V</ span >< span class = "special" > ...> </ span ></ code > , where < code class = "computeroutput" >< span class = "identifier" > V</ span >< span class = "special" > ...</ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code > with the placeholders replaced by the
corresponding element of < code class = "computeroutput" >< span class = "identifier" > U</ span >< span class = "special" > ...</ span ></ code > and the < code class = "computeroutput" >< span class = "identifier" > mp_bind</ span ></ code >
expressions replaced with their corresponding evaluations against < code class = "computeroutput" >< span class = "identifier" > U</ span >< span class = "special" > ...</ span ></ code > .
</ p >
< p >
For example, < code class = "computeroutput" >< span class = "identifier" > mp_bind</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "identifier" > _2</ span >< span class = "special" > ,</ span > < span class = "identifier" > mp_bind</ span >< span class = "special" > < </ span >< span class = "identifier" > G</ span >< span class = "special" > ,</ span > < span class = "identifier" > _1</ span >< span class = "special" > >> ::</ span >< span class = "identifier" > fn</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > > </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > void</ span >< span class = "special" > ,</ span > < span class = "identifier" > G</ span >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > >> </ span ></ code > .
</ p >
</ div >
2017-05-10 00:39:18 +03:00
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
2017-05-10 23:23:56 +03:00
< a name = "mp11.reference.bind.mp_bind_q_q_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.bind.mp_bind_q_q_t" title = "mp_bind_q<Q, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_bind_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span >
< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_bind_q</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_bind</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ::</ span >< span class = "keyword" > template</ span > < span class = "identifier" > fn</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> ;</ span >
</ pre >
< p >
As < code class = "computeroutput" >< span class = "identifier" > mp_bind</ span ></ code > , but takes a
quoted metafunction.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
2017-05-10 00:39:18 +03:00
< a name = "mp11.reference.bind.mp_bind_front_f_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.bind.mp_bind_front_f_t" title = "mp_bind_front<F, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_bind_front</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > struct</ span > < span class = "identifier" > mp_bind_front</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_bind_front</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > binds the leftmost arguments of
< code class = "computeroutput" >< span class = "identifier" > F</ span ></ code > to < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code > . Its nested template < code class = "computeroutput" >< span class = "identifier" > fn</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code > returns < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...,</ span > < span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.bind.mp_bind_front_q_q_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.bind.mp_bind_front_q_q_t" title = "mp_bind_front_q<Q, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_bind_front_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_bind_front_q</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_bind_front</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ::</ span >< span class = "keyword" > template</ span > < span class = "identifier" > fn</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> ;</ span >
</ pre >
< p >
As < code class = "computeroutput" >< span class = "identifier" > mp_bind_front</ span ></ code > , but takes
a quoted metafunction.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.bind.mp_bind_back_f_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.bind.mp_bind_back_f_t" title = "mp_bind_back<F, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_bind_back</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...> </ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > struct</ span > < span class = "identifier" > mp_bind_back</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_bind_back</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > binds the rightmost arguments of
< code class = "computeroutput" >< span class = "identifier" > F</ span ></ code > to < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code > . Its nested template < code class = "computeroutput" >< span class = "identifier" > fn</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code > returns < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > ...,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.bind.mp_bind_back_q_q_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.bind.mp_bind_back_q_q_t" title = "mp_bind_back_q<Q, T...>" >< code class = "computeroutput" >< span class = "identifier" > mp_bind_back_q</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > Q</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > mp_bind_back_q</ span > < span class = "special" > =</ span > < span class = "identifier" > mp_bind_back</ span >< span class = "special" > < </ span >< span class = "identifier" > Q</ span >< span class = "special" > ::</ span >< span class = "keyword" > template</ span > < span class = "identifier" > fn</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...> ;</ span >
</ pre >
< p >
As < code class = "computeroutput" >< span class = "identifier" > mp_bind_back</ span ></ code > , but takes
a quoted metafunction.
</ p >
</ div >
2017-04-01 19:46:45 +03:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
2017-05-23 20:24:37 +03:00
< a name = "mp11.reference.integer_sequence" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integer_sequence" title = "Integer Sequences, <boost/mp11/integer_sequence.hpp>" > Integer Sequences,
< code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > integer_sequence</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a >
2017-03-16 19:45:47 +02:00
</ h3 ></ div ></ div ></ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.integer_sequence.integer_sequence_t_i" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integer_sequence.integer_sequence_t_i" title = "integer_sequence<T, I...>" >< code class = "computeroutput" >< span class = "identifier" > integer_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > ...</ span > < span class = "identifier" > I</ span >< span class = "special" > > </ span > < span class = "keyword" > struct</ span > < span class = "identifier" > integer_sequence</ span >
< span class = "special" > {</ span >
< span class = "special" > };</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > integer_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ...> </ span ></ code > holds a sequence of integers of
type < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > . Same as C++14's
< code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > integer_sequence</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.integer_sequence.make_integer_sequence_t_n" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integer_sequence.make_integer_sequence_t_n" title = "make_integer_sequence<T, N>" >< code class = "computeroutput" >< span class = "identifier" > make_integer_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > make_integer_sequence</ span > < span class = "special" > =</ span > < span class = "comment" > /*...*/</ span >< span class = "special" > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > make_integer_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > integer_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ,</ span > < span class = "number" > 0</ span >< span class = "special" > ,</ span >
< span class = "number" > 1</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > N</ span >< span class = "special" > -</ span >< span class = "number" > 1</ span >< span class = "special" > > </ span ></ code > .
Same as C++14's < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > make_integer_sequence</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.integer_sequence.index_sequence_i" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integer_sequence.index_sequence_i" title = "index_sequence<I...>" >< code class = "computeroutput" >< span class = "identifier" > index_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span >< span class = "special" > ...</ span > < span class = "identifier" > I</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > index_sequence</ span > < span class = "special" > =</ span > < span class = "identifier" > integer_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ...> ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > index_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > ...> </ span ></ code >
is an alias for < code class = "computeroutput" >< span class = "identifier" > integer_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > size_t</ span >< span class = "special" > ,</ span > < span class = "identifier" > I</ span >< span class = "special" > ...> </ span ></ code > .
Same as C++14's < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > index_sequence</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.integer_sequence.make_index_sequence_n" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integer_sequence.make_index_sequence_n" title = "make_index_sequence<N>" >< code class = "computeroutput" >< span class = "identifier" > make_index_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span > < span class = "identifier" > N</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > make_index_sequence</ span > < span class = "special" > =</ span > < span class = "identifier" > make_integer_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span >< span class = "special" > ,</ span > < span class = "identifier" > N</ span >< span class = "special" > > ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > make_index_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > index_sequence</ span >< span class = "special" > < </ span >< span class = "number" > 0</ span >< span class = "special" > ,</ span > < span class = "number" > 1</ span >< span class = "special" > ,</ span > < span class = "special" > ...,</ span > < span class = "identifier" > N</ span >< span class = "special" > -</ span >< span class = "number" > 1</ span >< span class = "special" > > </ span ></ code > . Same as C++14's < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > make_index_sequence</ span ></ code > .
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.integer_sequence.index_sequence_for_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integer_sequence.index_sequence_for_t" title = "index_sequence_for<T...>" >< code class = "computeroutput" >< span class = "identifier" > index_sequence_for</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > index_sequence_for</ span > < span class = "special" > =</ span > < span class = "identifier" > make_integer_sequence</ span >< span class = "special" > < </ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > size_t</ span >< span class = "special" > ,</ span > < span class = "keyword" > sizeof</ span >< span class = "special" > ...(</ span >< span class = "identifier" > T</ span >< span class = "special" > )> ;</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > index_sequence_for</ span >< span class = "special" > < </ span >< span class = "identifier" > N</ span >< span class = "special" > > </ span ></ code >
is < code class = "computeroutput" >< span class = "identifier" > make_index_sequence</ span >< span class = "special" > < </ span >< span class = "keyword" > sizeof</ span >< span class = "special" > ...(</ span >< span class = "identifier" > T</ span >< span class = "special" > )> </ span ></ code > . Same as C++14's < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > index_sequence_for</ span ></ code > .
</ p >
</ div >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
2017-05-23 20:24:37 +03:00
< a name = "mp11.reference.tuple_for_each" ></ a >< a class = "link" href = "mp11.html#mp11.reference.tuple_for_each" title = 'A "for each" algorithm for tuple-like types, <boost/mp11/tuple_for_each.hpp>' > A "for each"
algorithm for tuple-like types, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > mp11</ span >< span class = "special" > /</ span >< span class = "identifier" > tuple_for_each</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a >
2017-03-16 19:45:47 +02:00
</ h3 ></ div ></ div ></ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.tuple_for_each.tuple_for_each" ></ a >< a class = "link" href = "mp11.html#mp11.reference.tuple_for_each.tuple_for_each" title = "tuple_for_each" >< code class = "computeroutput" >< span class = "identifier" > tuple_for_each</ span ></ code ></ a >
</ h4 ></ div ></ div ></ div >
< pre class = "programlisting" >< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > Tp</ span >< span class = "special" > ,</ span > < span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span > < span class = "keyword" > constexpr</ span > < span class = "identifier" > F</ span > < span class = "identifier" > tuple_for_each</ span >< span class = "special" > (</ span >< span class = "identifier" > Tp</ span >< span class = "special" > && </ span > < span class = "identifier" > tp</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > && </ span > < span class = "identifier" > f</ span >< span class = "special" > );</ span >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > tuple_for_each</ span >< span class = "special" > (</ span >< span class = "identifier" > tp</ span >< span class = "special" > ,</ span > < span class = "identifier" > f</ span >< span class = "special" > )</ span ></ code > applies
the function object < code class = "computeroutput" >< span class = "identifier" > f</ span ></ code > to
each element of < code class = "computeroutput" >< span class = "identifier" > tp</ span ></ code > by evaluating
the expression < code class = "computeroutput" >< span class = "identifier" > f</ span >< span class = "special" > (</ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > get</ span >< span class = "special" > < </ span >< span class = "identifier" > J</ span >< span class = "special" > > (</ span >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > forward</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > > (</ span >< span class = "identifier" > tp</ span >< span class = "special" > )))</ span ></ code >
for < code class = "computeroutput" >< span class = "identifier" > J</ span ></ code > in 0..< code class = "computeroutput" >< span class = "identifier" > N</ span >< span class = "special" > -</ span >< span class = "number" > 1</ span ></ code > ,
2017-05-24 20:55:35 +03:00
where < code class = "computeroutput" >< span class = "identifier" > N</ span ></ code > is < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > tuple_size</ span >< span class = "special" > < </ span >< span class = "keyword" > typename</ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > remove_reference</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > > ::</ span >< span class = "identifier" > value</ span ></ code > .
2017-03-16 19:45:47 +02:00
</ p >
< p >
Returns < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > forward</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > (</ span >< span class = "identifier" > f</ span >< span class = "special" > )</ span ></ code > .
</ p >
</ div >
</ div >
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</ div >
</ div >
< table xmlns:rev = "http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width = "100%" >< tr >
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< td align = "left" >< p >< small > Last revised: May 28, 2017 at 23:51:44 GMT</ small ></ p ></ td >
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< td align = "right" >< div class = "copyright-footer" ></ div ></ td >
</ tr ></ table >
< hr >
< div class = "spirit-nav" ></ div >
</ body >
</ html >
