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78 lines
2.8 KiB
78 lines
2.8 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_REQUIRES_DWA2006430_HPP |
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# define BOOST_CONCEPT_REQUIRES_DWA2006430_HPP |
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# include <boost/config.hpp> |
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# include <boost/parameter/aux_/parenthesized_type.hpp> |
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# include <boost/concept/assert.hpp> |
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# include <boost/preprocessor/seq/for_each.hpp> |
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namespace boost { |
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// Template for use in handwritten assertions |
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template <class Model, class More> |
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struct requires_ : More |
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{ |
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# if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) |
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typedef typename More::type type; |
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# endif |
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BOOST_CONCEPT_ASSERT((Model)); |
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}; |
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// Template for use by macros, where models must be wrapped in parens. |
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// This isn't in namespace detail to keep extra cruft out of resulting |
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// error messages. |
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template <class ModelFn> |
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struct _requires_ |
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{ |
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enum { value = 0 }; |
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BOOST_CONCEPT_ASSERT_FN(ModelFn); |
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}; |
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template <int check, class Result> |
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struct Requires_ : ::boost::parameter::aux::unaryfunptr_arg_type<Result> |
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{ |
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# if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) |
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typedef typename ::boost::parameter::aux::unaryfunptr_arg_type<Result>::type type; |
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# endif |
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}; |
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# if BOOST_WORKAROUND(BOOST_INTEL_WIN, BOOST_TESTED_AT(1010)) |
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# define BOOST_CONCEPT_REQUIRES_(r,data,t) | (::boost::_requires_<void(*)t>::value) |
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# else |
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# define BOOST_CONCEPT_REQUIRES_(r,data,t) + (::boost::_requires_<void(*)t>::value) |
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# endif |
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#if defined(NDEBUG) || BOOST_WORKAROUND(BOOST_MSVC, < 1300) |
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# define BOOST_CONCEPT_REQUIRES(models, result) \ |
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typename ::boost::parameter::aux::unaryfunptr_arg_type<void(*)result>::type |
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#elif BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) |
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// Same thing as below without the initial typename |
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# define BOOST_CONCEPT_REQUIRES(models, result) \ |
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::boost::Requires_< \ |
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(0 BOOST_PP_SEQ_FOR_EACH(BOOST_CONCEPT_REQUIRES_, ~, models)), \ |
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::boost::parameter::aux::unaryfunptr_arg_type<void(*)result> \ |
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>::type |
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#else |
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// This just ICEs on MSVC6 :( |
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# define BOOST_CONCEPT_REQUIRES(models, result) \ |
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typename ::boost::Requires_< \ |
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(0 BOOST_PP_SEQ_FOR_EACH(BOOST_CONCEPT_REQUIRES_, ~, models)), \ |
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void(*)result \ |
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>::type |
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#endif |
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// C++0x proposed syntax changed. This supports an older usage |
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#define BOOST_CONCEPT_WHERE(models,result) BOOST_CONCEPT_REQUIRES(models,result) |
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} // namespace boost::concept_check |
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#endif // BOOST_CONCEPT_REQUIRES_DWA2006430_HPP
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