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