You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and dots ('.'), can be up to 35 characters long. Letters must be lowercase.
100 lines
2.7 KiB
100 lines
2.7 KiB
// Boost result_of library |
|
|
|
// Copyright Douglas Gregor 2004. Use, modification and |
|
// distribution is 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) |
|
|
|
// For more information, see http://www.boost.org/libs/utility |
|
#ifndef BOOST_RESULT_OF_HPP |
|
#define BOOST_RESULT_OF_HPP |
|
|
|
#include <boost/config.hpp> |
|
#include <boost/preprocessor/iteration/iterate.hpp> |
|
#include <boost/preprocessor/punctuation/comma_if.hpp> |
|
#include <boost/preprocessor/repetition/enum_params.hpp> |
|
#include <boost/preprocessor/repetition/enum_shifted_params.hpp> |
|
#include <boost/detail/workaround.hpp> |
|
#include <boost/mpl/has_xxx.hpp> |
|
#include <boost/mpl/if.hpp> |
|
#include <boost/mpl/bool.hpp> |
|
#include <boost/mpl/or.hpp> |
|
#include <boost/type_traits/is_pointer.hpp> |
|
#include <boost/type_traits/is_member_function_pointer.hpp> |
|
#include <boost/type_traits/remove_cv.hpp> |
|
|
|
#ifndef BOOST_RESULT_OF_NUM_ARGS |
|
# define BOOST_RESULT_OF_NUM_ARGS 10 |
|
#endif |
|
|
|
namespace boost { |
|
|
|
template<typename F> struct result_of; |
|
template<typename F> struct tr1_result_of; // a TR1-style implementation of result_of |
|
|
|
#if !defined(BOOST_NO_SFINAE) && !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) |
|
namespace detail { |
|
|
|
BOOST_MPL_HAS_XXX_TRAIT_DEF(result_type) |
|
|
|
template<typename F, typename FArgs, bool HasResultType> struct tr1_result_of_impl; |
|
template<typename F> struct cpp0x_result_of_impl; |
|
|
|
template<typename F> |
|
struct result_of_void_impl |
|
{ |
|
typedef void type; |
|
}; |
|
|
|
template<typename R> |
|
struct result_of_void_impl<R (*)(void)> |
|
{ |
|
typedef R type; |
|
}; |
|
|
|
template<typename R> |
|
struct result_of_void_impl<R (&)(void)> |
|
{ |
|
typedef R type; |
|
}; |
|
|
|
// Determine the return type of a function pointer or pointer to member. |
|
template<typename F, typename FArgs> |
|
struct result_of_pointer |
|
: tr1_result_of_impl<typename remove_cv<F>::type, FArgs, false> { }; |
|
|
|
template<typename F, typename FArgs> |
|
struct tr1_result_of_impl<F, FArgs, true> |
|
{ |
|
typedef typename F::result_type type; |
|
}; |
|
|
|
template<typename FArgs> |
|
struct is_function_with_no_args : mpl::false_ {}; |
|
|
|
template<typename F> |
|
struct is_function_with_no_args<F(void)> : mpl::true_ {}; |
|
|
|
template<typename F, typename FArgs> |
|
struct result_of_nested_result : F::template result<FArgs> |
|
{}; |
|
|
|
template<typename F, typename FArgs> |
|
struct tr1_result_of_impl<F, FArgs, false> |
|
: mpl::if_<is_function_with_no_args<FArgs>, |
|
result_of_void_impl<F>, |
|
result_of_nested_result<F, FArgs> >::type |
|
{}; |
|
|
|
} // end namespace detail |
|
|
|
#define BOOST_PP_ITERATION_PARAMS_1 (3,(0,BOOST_RESULT_OF_NUM_ARGS,<boost/utility/detail/result_of_iterate.hpp>)) |
|
#include BOOST_PP_ITERATE() |
|
|
|
#else |
|
# define BOOST_NO_RESULT_OF 1 |
|
#endif |
|
|
|
} |
|
|
|
#endif // BOOST_RESULT_OF_HPP
|
|
|