63e88f80
 Hu Chunming
提交三方库
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// Copyright David Abrahams 2006. Distributed under the Boost
// Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_CONCEPT_CHECK_MSVC_DWA2006429_HPP
# define BOOST_CONCEPT_CHECK_MSVC_DWA2006429_HPP
# ifdef BOOST_OLD_CONCEPT_SUPPORT
# include <boost/concept_check/has_constraints.hpp>
# include <boost/type_traits/conditional.hpp>
# endif
// This implementation works on GCC and Comeau, but has actually been
// fairly carefully tuned to work on GCC versions starting with
// gcc-2.95.x. If you're trying to get an additional compiler to pass
// the tests you might consider breaking out a separate gcc.hpp and
// starting over on the general case.
namespace boost
{
namespace concept_checking
{
template <void(*)()> struct instantiate {};
}
template <class ModelFn> struct concept_check_;
template <class Model>
void concept_check_failed()
{
((Model*)0)->~Model();
}
template <class Model>
struct concept_check
{
concept_checking::instantiate<concept_check_failed<Model> > x;
enum { instantiate = 1 };
};
# ifdef BOOST_OLD_CONCEPT_SUPPORT
template <class Model>
void constraint_check_failed()
{
((Model*)0)->constraints();
}
template <class Model>
struct constraint_check
{
concept_checking::instantiate<constraint_check_failed<Model> > x;
enum { instantiate = 1 };
};
template <class Model>
struct concept_check_<void(*)(Model)>
: conditional<
concept_checking::has_constraints<Model>::value
, constraint_check<Model>
, concept_check<Model>
>::type
{};
# else
template <class Model>
struct concept_check_<void(*)(Model)>
: concept_check<Model>
{};
# endif
// Usage, in class or function context:
//
// BOOST_CONCEPT_ASSERT((UnaryFunctionConcept<F,bool,int>));
# define BOOST_CONCEPT_ASSERT( ModelInParens ) \
enum { BOOST_PP_CAT(boost_concept_check,__LINE__) = \
::boost::concept_check_<void(*) ModelInParens>::instantiate \
}
}
#endif // BOOST_CONCEPT_CHECK_MSVC_DWA2006429_HPP
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