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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
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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 >
< 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 >
< 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 >
</ 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 >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.utility.mp_if_c_b_t_e" >< code class = "computeroutput" >< span class = "identifier" > mp_if_c</ span >< span class = "special" > < </ span >< span class = "identifier" > B</ 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 >
< 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 >
< 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_b_t_f_u" >< code class = "computeroutput" >< span class = "identifier" > mp_eval_if_c</ span >< span class = "special" > < </ span >< span class = "identifier" > B</ 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 >
< 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 >
< 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_t" >< code class = "computeroutput" >< 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 ></ 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 >
< 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 >
< 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 >
< 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 >
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< 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 >
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< 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 >
< 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 >
< 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 >
</ 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 >
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< 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 >
< 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 >
</ dl ></ dd >
< dt >< span class = "section" >< a href = "mp11.html#mp11.reference.integer_sequence" > Integer Sequences,
< code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ 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 >
< 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"
algorithm for tuple-like types, < code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ 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 >
< 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
C++11 metaprogramming</ a > (< a href = "http://pdimov.com/cpp2/simple_cxx11_metaprogramming_2.html" target = "_top" > part
2</ a > ).
</ 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 >
2017-03-17 05:55:27 +02:00
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 >
2017-03-16 19:45:47 +02:00
</ 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" >
2017-03-17 05:55:27 +02:00
< a name = "mp11.definitions" ></ a >< a class = "link" href = "mp11.html#mp11.definitions" title = "Definitions" > Definitions</ a >
</ h2 ></ div ></ div ></ div >
< p >
A < span class = "emphasis" >< em > list</ em ></ span > is a — possibly but not necessarily variadic — template
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
called < code class = "computeroutput" >< span class = "identifier" > invoke</ span ></ code > , for example
</ p >
< 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" > invoke</ 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" > invoke</ 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" > invoke</ 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 >
</ 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 >
</ 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 >
< 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 = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > common_type_t</ 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 = "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 = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > common_type_t</ 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 >
</ 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" > tuple_for_each</ 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 >
< 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 = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > common_type_t</ 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 = "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 = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > common_type_t</ 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 = "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 >
< 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 = "string" > " "</ 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 = "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" > boost</ 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 = "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 >
< span class = "special" > }</ span >
</ pre >
</ 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 >
< 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" > invoke</ 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 >
< 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 >
< pre class = "programlisting" >< span class = "keyword" > using</ span > < span class = "identifier" > R</ 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" > invoke</ 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 >
</ 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 > .
</ 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 >
< 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" > invoke</ 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 >
</ 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 >
< 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" > invoke</ 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 >
< 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 >
< 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" > invoke</ 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 >
< 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" >
2017-03-14 22:57:07 +02:00
< a name = "mp11.reference" ></ a >< a class = "link" href = "mp11.html#mp11.reference" title = "Reference" > Reference</ a >
</ h2 ></ div ></ div ></ div >
2017-03-16 19:45:47 +02:00
< p >
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 > , unless
specified otherwise.
</ p >
2017-03-14 22:57:07 +02:00
< 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 >
2017-03-16 19:45:47 +02:00
< 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 >
2017-03-14 22:57:07 +02:00
< 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 >
</ 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 >
</ 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 >
</ 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 >
</ 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 >
</ 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 >
</ 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 >
</ 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 >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< 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 >
</ div >
</ 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" >
< a name = "mp11.reference.utility.mp_if_c_b_t_e" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_if_c_b_t_e" title = "mp_if_c<B, T, E>" >< code class = "computeroutput" >< span class = "identifier" > mp_if_c</ span >< span class = "special" > < </ span >< span class = "identifier" > B</ 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 >
</ 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" > class</ 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 >
</ pre >
< p >
< code class = "computeroutput" >< span class = "identifier" > mp_if_c</ span >< span class = "special" > < </ span >< span class = "identifier" > B</ 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 > when
< code class = "computeroutput" >< span class = "identifier" > B</ span ></ code > is < code class = "computeroutput" >< span class = "keyword" > true</ span ></ code > ,
for < code class = "computeroutput" >< span class = "identifier" > E</ span ></ code > otherwise.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< 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 >
</ 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" > 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 >
</ pre >
< p >
< 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 >
is an alias for < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > when
< code class = "computeroutput" >< span class = "identifier" > C</ span >< span class = "special" > ::</ span >< span class = "identifier" > value</ span ></ code > is < code class = "computeroutput" >< span class = "keyword" > true</ span ></ code > ,
for < code class = "computeroutput" >< span class = "identifier" > E</ span ></ code > otherwise.
</ p >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "mp11.reference.utility.mp_eval_if_c_b_t_f_u" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_eval_if_c_b_t_f_u" title = "mp_eval_if_c<B, T, F, U...>" >< code class = "computeroutput" >< span class = "identifier" > mp_eval_if_c</ span >< span class = "special" > < </ span >< span class = "identifier" > B</ 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" > 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 >
< code class = "computeroutput" >< span class = "identifier" > mp_eval_if_c</ span >< span class = "special" > < </ span >< span class = "identifier" > B</ 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 >
is an alias for < code class = "computeroutput" >< span class = "identifier" > T</ span ></ code > when
< code class = "computeroutput" >< span class = "identifier" > B</ span ></ code > is < code class = "computeroutput" >< span class = "keyword" > true</ span ></ code > ,
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" >
< 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_t" ></ a >< a class = "link" href = "mp11.html#mp11.reference.utility.mp_quote_f_t" title = "mp_quote<F, T...>" >< code class = "computeroutput" >< 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 ></ 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" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > T</ 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" > U</ span >< span class = "special" > > </ span > < span class = "keyword" > using</ span > < span class = "identifier" > invoke</ span > < span class = "special" > =</ span > < 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 >
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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 > < span class = "identifier" > T</ span >< span class = "special" > ...> </ span ></ code > transforms the template < code class = "computeroutput" >< span class = "identifier" > F</ span ></ code > into a type. In the common case < code class = "computeroutput" >< span class = "identifier" > mp_quote</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code > ,
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the nested template < code class = "computeroutput" >< span class = "identifier" > invoke</ span ></ code >
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of the result is an alias for < code class = "computeroutput" >< span class = "identifier" > F</ span ></ code > ;
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otherwise, < code class = "computeroutput" >< span class = "identifier" > invoke</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ 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 > < span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code > ,
allowing partial application.
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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" > invoke</ 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" > invoke</ 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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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 > .
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< 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 > < span class = "identifier" > U</ span >< span class = "special" > ...> </ span ></ code > 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 > < span class = "identifier" > U</ 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" >
< 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 >
</ 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" > 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 >
</ pre >
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< p >
< code class = "computeroutput" >< span class = "identifier" > mp_transform_if</ span ></ code > replaces
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 >
with < code class = "computeroutput" >< span class = "identifier" > F</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ 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_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 >
< code class = "computeroutput" >< span class = "identifier" > mp_count_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 > 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 < 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" >
< 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 >
2017-03-14 22:57:07 +02:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
2017-03-15 19:43:06 +02:00
< 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 >
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 = "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 >
2017-03-15 19:43:06 +02:00
< 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 >
2017-03-14 22:57:07 +02:00
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
2017-03-15 19:43:06 +02:00
< 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 >
2017-03-15 19:43:06 +02:00
< 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" >
< 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" >
< 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 >
2017-03-15 19:43:06 +02:00
< 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 >
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_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 >
2017-03-15 19:43:06 +02:00
< 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 >
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_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 >
2017-03-15 19:43:06 +02:00
< 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 >
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_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 >
2017-03-15 19:43:06 +02:00
< 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 >
2017-03-14 22:57:07 +02:00
</ pre >
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< p >
< 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 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 >
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
no such element, < 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_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 >
2017-03-15 20:19:36 +02:00
< 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 >
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_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 >
2017-03-15 20:19:36 +02:00
< 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 >
2017-03-14 22:57:07 +02:00
</ div >
</ 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 >
< 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 > ,
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" >
< 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 >
is an alias for the first type < code class = "computeroutput" >< span class = "identifier" > U</ span ></ code >
in < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code >
for which < 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_false</ span ></ code > . If no such
type exists, the last one is returned. < 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 > .
Similar to < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > conjunction</ span ></ code > in C++17.
</ p >
</ 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 >
is faster.
</ p >
</ 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 >
is an alias for the first type < code class = "computeroutput" >< span class = "identifier" > U</ span ></ code >
in < code class = "computeroutput" >< span class = "identifier" > T</ span >< span class = "special" > ...</ span ></ code >
for which < 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 > . If no such
type exists, the last one is returned. < 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 > .
Similar to < code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > disjunction</ span ></ code > in C++17.
</ p >
</ 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 >
</ div >
</ div >
< div class = "section" >
< div class = "titlepage" >< div >< div >< h3 class = "title" >
< a name = "mp11.reference.integer_sequence" ></ a >< a class = "link" href = "mp11.html#mp11.reference.integer_sequence" title = "Integer Sequences, <boost/integer_sequence.hpp>" > Integer Sequences,
< code class = "computeroutput" >< span class = "special" > < </ span >< span class = "identifier" > boost</ 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 >
</ h3 ></ div ></ div ></ div >
< p >
The contents of this header are defined in namespace < code class = "computeroutput" >< span class = "identifier" > boost</ span ></ code > .
</ p >
< 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" >
< 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/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" > tuple_for_each</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span ></ code ></ a >
</ h3 ></ div ></ div ></ div >
< p >
The contents of this header are defined in namespace < code class = "computeroutput" >< span class = "identifier" > boost</ span ></ code > .
</ p >
< 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 > ,
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 = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > remove_reference_t</ span >< span class = "special" > < </ span >< span class = "identifier" > Tp</ span >< span class = "special" > >> ::</ span >< span class = "identifier" > value</ span ></ code > .
</ 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 > .
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< td align = "left" >< p >< small > Last revised: March 17, 2017 at 03:26:57 GMT</ small ></ p ></ td >
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