forked from boostorg/concept_check
64 lines
2.2 KiB
C++
Executable File
64 lines
2.2 KiB
C++
Executable File
// 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_WHERE_DWA2006430_HPP
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# define BOOST_CONCEPT_WHERE_DWA2006430_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 where_ : 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, class More>
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struct _where_ : 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_FN(ModelFn);
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};
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#define BOOST_CONCEPT_WHERE_OPEN(r,data,t) ::boost::_where_<void(*)t,
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#define BOOST_CONCEPT_WHERE_CLOSE(r,data,t) >
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#if defined(NDEBUG) || BOOST_WORKAROUND(BOOST_MSVC, < 1300)
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# define BOOST_CONCEPT_WHERE(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_WHERE(models, result) \
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BOOST_PP_SEQ_FOR_EACH(BOOST_CONCEPT_WHERE_OPEN, ~, models) \
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::boost::parameter::aux::unaryfunptr_arg_type<void(*)result> \
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BOOST_PP_SEQ_FOR_EACH(BOOST_CONCEPT_WHERE_CLOSE, ~, models)::type
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#else
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// This just ICEs on MSVC6 :(
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# define BOOST_CONCEPT_WHERE(models, result) \
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typename BOOST_PP_SEQ_FOR_EACH(BOOST_CONCEPT_WHERE_OPEN, ~, models) \
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::boost::parameter::aux::unaryfunptr_arg_type<void(*)result> \
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BOOST_PP_SEQ_FOR_EACH(BOOST_CONCEPT_WHERE_CLOSE, ~, models)::type
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#endif
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} // namespace boost::concept_check
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#endif // BOOST_CONCEPT_WHERE_DWA2006430_HPP
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