83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
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// Copyright David Abrahams 2006. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_CONCEPT_CHECK_MSVC_DWA2006429_HPP
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# define BOOST_CONCEPT_CHECK_MSVC_DWA2006429_HPP
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# ifdef BOOST_OLD_CONCEPT_SUPPORT
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# include <boost/concept_check/has_constraints.hpp>
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# include <boost/mpl/if.hpp>
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# endif
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// This implementation works on GCC and Comeau, but has actually been
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// fairly carefully tuned to work on GCC versions starting with
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// gcc-2.95.x. If you're trying to get an additional compiler to pass
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// the tests you might consider breaking out a separate gcc.hpp and
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// starting over on the general case.
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namespace boost
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{
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namespace concept_checking
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{
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template <void(*)()> struct instantiate {};
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}
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template <class ModelFn> struct concept_check_;
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template <class Model>
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void concept_check_failed()
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{
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((Model*)0)->~Model();
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}
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template <class Model>
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struct concept_check
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{
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concept_checking::instantiate<concept_check_failed<Model> > x;
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enum { instantiate = 1 };
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};
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# ifdef BOOST_OLD_CONCEPT_SUPPORT
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template <class Model>
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void constraint_check_failed()
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{
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((Model*)0)->constraints();
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}
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template <class Model>
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struct constraint_check
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{
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concept_checking::instantiate<constraint_check_failed<Model> > x;
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enum { instantiate = 1 };
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};
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template <class Model>
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struct concept_check_<void(*)(Model)>
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: mpl::if_c<
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concept_checking::has_constraints<Model>::value
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, constraint_check<Model>
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, concept_check<Model>
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>::type
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{};
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# else
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template <class Model>
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struct concept_check_<void(*)(Model)>
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: concept_check<Model>
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{};
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# endif
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// Usage, in class or function context:
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//
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// BOOST_CONCEPT_ASSERT((UnaryFunctionConcept<F,bool,int>));
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# define BOOST_CONCEPT_ASSERT( ModelInParens ) \
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enum { BOOST_PP_CAT(boost_concept_check,__LINE__) = \
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::boost::concept_check_<void(*) ModelInParens>::instantiate \
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}
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}
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#endif // BOOST_CONCEPT_CHECK_MSVC_DWA2006429_HPP
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