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https://github.com/boostorg/mpl.git
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116 lines
3.1 KiB
C++
116 lines
3.1 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/test/apply.cpp source file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2000-02
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// Aleksey Gurtovoy
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//
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// Permission to use, copy, modify, distribute and sell this software
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// and its documentation for any purpose is hereby granted without fee,
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// provided that the above copyright notice appears in all copies and
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// that both the copyright notice and this permission notice appear in
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// supporting documentation. No representations are made about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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#include "boost/mpl/apply.hpp"
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#include "boost/mpl/assert_is_same.hpp"
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#include "boost/mpl/limits/arity.hpp"
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#include "boost/mpl/aux_/preprocessor/params.hpp"
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#include "boost/mpl/aux_/preprocessor/enum.hpp"
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#include "boost/mpl/aux_/preprocessor/project1st.hpp"
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#include "boost/preprocessor/repeat_2nd.hpp"
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#include "boost/preprocessor/comma_if.hpp"
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#include "boost/preprocessor/dec.hpp"
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#include "boost/preprocessor/if.hpp"
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#include "boost/preprocessor/cat.hpp"
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namespace mpl = boost::mpl;
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#define APPLY_0_FUNC_DEF(i) \
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struct f0 { typedef char type; }; \
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/**/
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#define APPLY_N_FUNC_DEF(i) \
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struct first##i \
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{ \
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template< BOOST_MPL_PP_PARAMS(i, typename U) > \
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struct apply { typedef U1 type; }; \
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}; \
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\
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struct last##i \
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{ \
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template< BOOST_MPL_PP_PARAMS(i, typename U) > \
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struct apply { typedef BOOST_PP_CAT(U,i) type; }; \
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}; \
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/**/
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#define APPLY_FUNC_DEF(z, i, unused) \
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BOOST_PP_IF( \
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i \
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, APPLY_N_FUNC_DEF \
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, APPLY_0_FUNC_DEF \
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)(i) \
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/**/
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namespace aux {
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BOOST_PP_REPEAT_2ND(
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BOOST_MPL_METAFUNCTION_MAX_ARITY
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, APPLY_FUNC_DEF
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, unused
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)
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}
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#define APPLY_0_TEST(i, apply_) \
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typedef mpl::apply_<aux::f##i>::type t; \
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{ BOOST_MPL_ASSERT_IS_SAME(t, char); } \
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/**/
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#define APPLY_N_TEST(i, apply_) \
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typedef mpl::apply_< \
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aux::first##i \
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, char \
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BOOST_PP_COMMA_IF(BOOST_PP_DEC(i)) \
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BOOST_MPL_PP_ENUM(BOOST_PP_DEC(i), int) \
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>::type t1; \
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\
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typedef mpl::apply_< \
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aux::last##i \
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, BOOST_MPL_PP_ENUM(BOOST_PP_DEC(i), int) \
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BOOST_PP_COMMA_IF(BOOST_PP_DEC(i)) char \
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>::type t2; \
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{ BOOST_MPL_ASSERT_IS_SAME(t1, char); } \
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{ BOOST_MPL_ASSERT_IS_SAME(t2, char); } \
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/**/
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#define APPLY_TEST(z, i, APPLY_NAME) \
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BOOST_PP_IF( \
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i \
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, APPLY_N_TEST \
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, APPLY_0_TEST \
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)(i, APPLY_NAME(i)) \
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/**/
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#define MAKE_APPLY_N_NAME(i) apply##i
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#define MAKE_APPLY_NAME(i) apply
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int main()
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{
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BOOST_PP_REPEAT_2ND(
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BOOST_MPL_METAFUNCTION_MAX_ARITY
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, APPLY_TEST
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, MAKE_APPLY_N_NAME
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)
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#if defined(BOOST_MPL_HAS_APPLY)
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BOOST_PP_REPEAT_2ND(
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BOOST_MPL_METAFUNCTION_MAX_ARITY
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, APPLY_TEST
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, MAKE_APPLY_NAME
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)
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#endif
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return 0;
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}
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