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75 lines
1.8 KiB
75 lines
1.8 KiB
// 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_DETAIL_GENERAL_DWA2006429_HPP |
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# define BOOST_CONCEPT_DETAIL_GENERAL_DWA2006429_HPP |
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# include <boost/preprocessor/cat.hpp> |
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# include <boost/concept/detail/backward_compatibility.hpp> |
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# ifdef BOOST_OLD_CONCEPT_SUPPORT |
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# include <boost/concept/detail/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 Comeau and GCC, all the way back to |
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// 2.95 |
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namespace boost { namespace concepts { |
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template <class ModelFn> |
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struct requirement_; |
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namespace detail |
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{ |
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template <void(*)()> struct instantiate {}; |
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} |
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template <class Model> |
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struct requirement |
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{ |
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static void failed() { ((Model*)0)->~Model(); } |
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}; |
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struct failed {}; |
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template <class Model> |
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struct requirement<failed ************ Model::************> |
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{ |
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static void failed() { ((Model*)0)->~Model(); } |
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}; |
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# ifdef BOOST_OLD_CONCEPT_SUPPORT |
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template <class Model> |
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struct constraint |
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{ |
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static void failed() { ((Model*)0)->constraints(); } |
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}; |
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template <class Model> |
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struct requirement_<void(*)(Model)> |
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: mpl::if_< |
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concepts::not_satisfied<Model> |
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, constraint<Model> |
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, requirement<failed ************ Model::************> |
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>::type |
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{}; |
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# else |
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// For GCC-2.x, these can't have exactly the same name |
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template <class Model> |
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struct requirement_<void(*)(Model)> |
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: requirement<failed ************ Model::************> |
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{}; |
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# endif |
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# define BOOST_CONCEPT_ASSERT_FN( ModelFnPtr ) \ |
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typedef ::boost::concepts::detail::instantiate< \ |
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&::boost::concepts::requirement_<ModelFnPtr>::failed> \ |
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BOOST_PP_CAT(boost_concept_check,__LINE__) |
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}} |
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#endif // BOOST_CONCEPT_DETAIL_GENERAL_DWA2006429_HPP
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