is_member_function_pointer.hpp

来自「CGAL is a collaborative effort of severa」· HPP 代码 · 共 116 行

//  (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard
//  Hinnant & John Maddock 2000.  
//  Use, modification and distribution are subject to 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).
//
//  See http://www.boost.org/libs/type_traits for most recent version including documentation.


#ifndef BOOST_TT_IS_MEMBER_FUNCTION_POINTER_HPP_INCLUDED
#define BOOST_TT_IS_MEMBER_FUNCTION_POINTER_HPP_INCLUDED

#include "boost/type_traits/config.hpp"
#include "boost/detail/workaround.hpp"

#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !BOOST_WORKAROUND(__BORLANDC__, < 0x600)
#   include "boost/type_traits/detail/is_mem_fun_pointer_impl.hpp"
#else
#   include "boost/type_traits/is_reference.hpp"
#   include "boost/type_traits/is_array.hpp"
#   include "boost/type_traits/detail/is_mem_fun_pointer_tester.hpp"
#   include "boost/type_traits/detail/yes_no_type.hpp"
#   include "boost/type_traits/detail/false_result.hpp"
#   include "boost/type_traits/detail/ice_or.hpp"
#endif

// should be the last #include
#include "boost/type_traits/detail/bool_trait_def.hpp"

namespace boost {

#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !BOOST_WORKAROUND(__BORLANDC__, < 0x600)

BOOST_TT_AUX_BOOL_TRAIT_DEF1(
      is_member_function_pointer
    , T
    , ::boost::type_traits::is_mem_fun_pointer_impl<T>::value
    )

#else

namespace detail {

#ifndef __BORLANDC__

template <bool>
struct is_mem_fun_pointer_select
    : ::boost::type_traits::false_result
{
};

template <>
struct is_mem_fun_pointer_select<false>
{
    template <typename T> struct result_
    {
        static T& make_t;
        typedef result_<T> self_type;

        BOOST_STATIC_CONSTANT(
            bool, value = (
                1 == sizeof(::boost::type_traits::is_mem_fun_pointer_tester(self_type::make_t))
            ));
    };
};

template <typename T>
struct is_member_function_pointer_impl
    : is_mem_fun_pointer_select<
          ::boost::type_traits::ice_or<
              ::boost::is_reference<T>::value
            , ::boost::is_array<T>::value
            >::value
        >::template result_<T>
{
};

#else // Borland C++

template <typename T>
struct is_member_function_pointer_impl
{
   static T& m_t;
   BOOST_STATIC_CONSTANT(
              bool, value =
               (1 == sizeof(type_traits::is_mem_fun_pointer_tester(m_t))) );
};

template <typename T>
struct is_member_function_pointer_impl<T&>
{
   BOOST_STATIC_CONSTANT(bool, value = false);
};

#endif

BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_member_function_pointer,void,false)
#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_member_function_pointer,void const,false)
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_member_function_pointer,void volatile,false)
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_member_function_pointer,void const volatile,false)
#endif

} // namespace detail

BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_member_function_pointer,T,::boost::detail::is_member_function_pointer_impl<T>::value)

#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION

} // namespace boost

#include "boost/type_traits/detail/bool_trait_undef.hpp"

#endif // BOOST_TT_IS_MEMBER_FUNCTION_POINTER_HPP_INCLUDED