1 // Boost result_of library
3 // Copyright Douglas Gregor 2004. Use, modification and
4 // distribution is subject to the Boost Software License, Version
5 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
6 // http://www.boost.org/LICENSE_1_0.txt)
8 // Copyright Daniel Walker, Eric Niebler, Michel Morin 2008-2012.
9 // Use, modification and distribution is subject to the Boost Software
10 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or
11 // copy at http://www.boost.org/LICENSE_1_0.txt)
13 // For more information, see http://www.boost.org/libs/utility
14 #if !defined(BOOST_PP_IS_ITERATING)
15 # error Boost result_of - do not include this file!
18 // CWPro8 requires an argument in a function type specialization
19 #if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3002)) && BOOST_PP_ITERATION() == 0
20 # define BOOST_RESULT_OF_ARGS void
22 # define BOOST_RESULT_OF_ARGS BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)
25 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
26 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
27 struct tr1_result_of<F(BOOST_RESULT_OF_ARGS)>
29 mpl::or_< is_pointer<F>, is_member_function_pointer<F> >
30 , boost::detail::tr1_result_of_impl<
31 typename remove_cv<F>::type,
32 typename remove_cv<F>::type(BOOST_RESULT_OF_ARGS),
33 (boost::detail::has_result_type<F>::value)>
34 , boost::detail::tr1_result_of_impl<
36 F(BOOST_RESULT_OF_ARGS),
37 (boost::detail::has_result_type<F>::value)> >::type { };
40 #ifdef BOOST_RESULT_OF_USE_DECLTYPE
41 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
42 struct result_of<F(BOOST_RESULT_OF_ARGS)>
43 : detail::cpp0x_result_of<F(BOOST_RESULT_OF_ARGS)> { };
44 #endif // BOOST_RESULT_OF_USE_DECLTYPE
46 #ifdef BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK
47 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
48 struct result_of<F(BOOST_RESULT_OF_ARGS)>
49 : mpl::if_<mpl::or_<detail::has_result_type<F>, detail::has_result<F> >,
50 tr1_result_of<F(BOOST_RESULT_OF_ARGS)>,
51 detail::cpp0x_result_of<F(BOOST_RESULT_OF_ARGS)> >::type { };
52 #endif // BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK
54 #if defined(BOOST_RESULT_OF_USE_DECLTYPE) || defined(BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK)
58 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
59 struct cpp0x_result_of<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T))>
61 is_member_function_pointer<F>
62 , detail::tr1_result_of_impl<
63 typename remove_cv<F>::type,
64 typename remove_cv<F>::type(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), false
66 , detail::cpp0x_result_of_impl<
67 F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T))
72 #ifdef BOOST_NO_SFINAE_EXPR
75 struct BOOST_PP_CAT(result_of_callable_fun_2_, BOOST_PP_ITERATION());
77 template<typename R BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(), typename T)>
78 struct BOOST_PP_CAT(result_of_callable_fun_2_, BOOST_PP_ITERATION())<R(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), T))> {
79 R operator()(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), T)) const;
80 typedef result_of_private_type const &(*pfn_t)(...);
81 operator pfn_t() const volatile;
85 struct BOOST_PP_CAT(result_of_callable_fun_, BOOST_PP_ITERATION());
88 struct BOOST_PP_CAT(result_of_callable_fun_, BOOST_PP_ITERATION())<F *>
89 : BOOST_PP_CAT(result_of_callable_fun_2_, BOOST_PP_ITERATION())<F>
93 struct BOOST_PP_CAT(result_of_callable_fun_, BOOST_PP_ITERATION())<F &>
94 : BOOST_PP_CAT(result_of_callable_fun_2_, BOOST_PP_ITERATION())<F>
98 struct BOOST_PP_CAT(result_of_select_call_wrapper_type_, BOOST_PP_ITERATION())
100 is_class<typename remove_reference<F>::type>,
101 result_of_wrap_callable_class<F>,
102 mpl::identity<BOOST_PP_CAT(result_of_callable_fun_, BOOST_PP_ITERATION())<typename remove_cv<F>::type> >
106 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(), typename T)>
107 struct BOOST_PP_CAT(result_of_is_callable_, BOOST_PP_ITERATION()) {
108 typedef typename BOOST_PP_CAT(result_of_select_call_wrapper_type_, BOOST_PP_ITERATION())<F>::type wrapper_t;
109 static const bool value = (
110 sizeof(result_of_no_type) == sizeof(detail::result_of_is_private_type(
111 (boost::declval<wrapper_t>()(BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_ITERATION(), boost::declval<T, >() BOOST_PP_INTERCEPT)), result_of_weird_type())
114 typedef mpl::bool_<value> type;
117 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
118 struct cpp0x_result_of_impl<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), true>
120 BOOST_PP_CAT(result_of_is_callable_, BOOST_PP_ITERATION())<F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(), T)>
121 , cpp0x_result_of_impl<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), false>
125 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
126 struct cpp0x_result_of_impl<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), false>
130 BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_ITERATION(), boost::declval<T, >() BOOST_PP_INTERCEPT)
135 #else // BOOST_NO_SFINAE_EXPR
137 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
138 struct cpp0x_result_of_impl<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)),
139 typename result_of_always_void<decltype(
141 BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_ITERATION(), boost::declval<T, >() BOOST_PP_INTERCEPT)
146 BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_ITERATION(), boost::declval<T, >() BOOST_PP_INTERCEPT)
151 #endif // BOOST_NO_SFINAE_EXPR
153 } // namespace detail
155 #else // defined(BOOST_RESULT_OF_USE_DECLTYPE) || defined(BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK)
157 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
158 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
159 struct result_of<F(BOOST_RESULT_OF_ARGS)>
160 : tr1_result_of<F(BOOST_RESULT_OF_ARGS)> { };
163 #endif // defined(BOOST_RESULT_OF_USE_DECLTYPE)
165 #undef BOOST_RESULT_OF_ARGS
167 #if BOOST_PP_ITERATION() >= 1
171 template<typename R, typename FArgs BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
172 struct tr1_result_of_impl<R (*)(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), FArgs, false>
177 template<typename R, typename FArgs BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
178 struct tr1_result_of_impl<R (&)(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), FArgs, false>
183 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
184 template<typename R, typename FArgs BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
185 struct tr1_result_of_impl<R (T0::*)
186 (BOOST_PP_ENUM_SHIFTED_PARAMS(BOOST_PP_ITERATION(),T)),
192 template<typename R, typename FArgs BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
193 struct tr1_result_of_impl<R (T0::*)
194 (BOOST_PP_ENUM_SHIFTED_PARAMS(BOOST_PP_ITERATION(),T))
201 template<typename R, typename FArgs BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
202 struct tr1_result_of_impl<R (T0::*)
203 (BOOST_PP_ENUM_SHIFTED_PARAMS(BOOST_PP_ITERATION(),T))
210 template<typename R, typename FArgs BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
211 struct tr1_result_of_impl<R (T0::*)
212 (BOOST_PP_ENUM_SHIFTED_PARAMS(BOOST_PP_ITERATION(),T))