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219 lines
8.3 KiB
219 lines
8.3 KiB
3 years ago
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// Boost result_of library
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// Copyright Douglas Gregor 2004. Use, modification and
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// distribution is subject to the Boost Software License, Version
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// Copyright Daniel Walker, Eric Niebler, Michel Morin 2008-2012.
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or
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// copy at http://www.boost.org/LICENSE_1_0.txt)
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// For more information, see http://www.boost.org/libs/utility
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#if !defined(BOOST_PP_IS_ITERATING)
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# error Boost result_of - do not include this file!
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#endif
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// CWPro8 requires an argument in a function type specialization
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#if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3002)) && BOOST_PP_ITERATION() == 0
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# define BOOST_RESULT_OF_ARGS void
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#else
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# define BOOST_RESULT_OF_ARGS BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)
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#endif
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#if !BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x551))
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template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct tr1_result_of<F(BOOST_RESULT_OF_ARGS)>
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: conditional<
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is_pointer<F>::value || is_member_function_pointer<F>::value
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, boost::detail::tr1_result_of_impl<
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typename remove_cv<F>::type,
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typename remove_cv<F>::type(BOOST_RESULT_OF_ARGS),
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(boost::detail::result_of_has_result_type<F>::value)>
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, boost::detail::tr1_result_of_impl<
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F,
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F(BOOST_RESULT_OF_ARGS),
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(boost::detail::result_of_has_result_type<F>::value)> >::type { };
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#endif
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#ifdef BOOST_RESULT_OF_USE_DECLTYPE
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template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct result_of<F(BOOST_RESULT_OF_ARGS)>
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: detail::cpp0x_result_of<F(BOOST_RESULT_OF_ARGS)> { };
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#endif // BOOST_RESULT_OF_USE_DECLTYPE
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#ifdef BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK
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template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct result_of<F(BOOST_RESULT_OF_ARGS)>
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: conditional<detail::result_of_has_result_type<F>::value || detail::result_of_has_result<F>::value,
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tr1_result_of<F(BOOST_RESULT_OF_ARGS)>,
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detail::cpp0x_result_of<F(BOOST_RESULT_OF_ARGS)> >::type { };
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#endif // BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK
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#if defined(BOOST_RESULT_OF_USE_DECLTYPE) || defined(BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK)
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namespace detail {
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template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct cpp0x_result_of<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T))>
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: conditional<
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is_member_function_pointer<F>::value
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, detail::tr1_result_of_impl<
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typename remove_cv<F>::type,
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typename remove_cv<F>::type(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), false
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>
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, detail::cpp0x_result_of_impl<
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F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T))
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>
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>::type
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{};
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#ifdef BOOST_NO_SFINAE_EXPR
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template<typename F>
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struct BOOST_PP_CAT(result_of_callable_fun_2_, BOOST_PP_ITERATION());
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template<typename R BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(), typename T)>
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struct BOOST_PP_CAT(result_of_callable_fun_2_, BOOST_PP_ITERATION())<R(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), T))> {
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R operator()(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), T)) const;
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typedef result_of_private_type const &(*pfn_t)(...);
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operator pfn_t() const volatile;
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};
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template<typename F>
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struct BOOST_PP_CAT(result_of_callable_fun_, BOOST_PP_ITERATION())
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: BOOST_PP_CAT(result_of_callable_fun_2_, BOOST_PP_ITERATION())<F>
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{};
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template<typename F>
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struct BOOST_PP_CAT(result_of_callable_fun_, BOOST_PP_ITERATION())<F *>
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: BOOST_PP_CAT(result_of_callable_fun_2_, BOOST_PP_ITERATION())<F>
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{};
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template<typename F>
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struct BOOST_PP_CAT(result_of_select_call_wrapper_type_, BOOST_PP_ITERATION())
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: conditional<
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is_class<typename remove_reference<F>::type>::value,
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result_of_wrap_callable_class<F>,
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type_identity<BOOST_PP_CAT(result_of_callable_fun_, BOOST_PP_ITERATION())<typename remove_cv<typename remove_reference<F>::type>::type> >
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>::type
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{};
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template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(), typename T)>
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struct BOOST_PP_CAT(result_of_is_callable_, BOOST_PP_ITERATION()) {
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typedef typename BOOST_PP_CAT(result_of_select_call_wrapper_type_, BOOST_PP_ITERATION())<F>::type wrapper_t;
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static const bool value = (
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sizeof(result_of_no_type) == sizeof(detail::result_of_is_private_type(
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(boost::declval<wrapper_t>()(BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_ITERATION(), boost::declval<T, >() BOOST_PP_INTERCEPT)), result_of_weird_type())
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))
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);
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typedef integral_constant<bool, value> type;
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};
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template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct cpp0x_result_of_impl<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), true>
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: lazy_enable_if<
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BOOST_PP_CAT(result_of_is_callable_, BOOST_PP_ITERATION())<F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(), T)>
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, cpp0x_result_of_impl<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), false>
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>
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{};
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template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct cpp0x_result_of_impl<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), false>
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{
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typedef decltype(
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boost::declval<F>()(
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BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_ITERATION(), boost::declval<T, >() BOOST_PP_INTERCEPT)
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)
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) type;
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};
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#else // BOOST_NO_SFINAE_EXPR
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template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct cpp0x_result_of_impl<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)),
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typename result_of_always_void<decltype(
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boost::declval<F>()(
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BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_ITERATION(), boost::declval<T, >() BOOST_PP_INTERCEPT)
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)
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)>::type> {
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typedef decltype(
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boost::declval<F>()(
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BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_ITERATION(), boost::declval<T, >() BOOST_PP_INTERCEPT)
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)
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) type;
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};
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#endif // BOOST_NO_SFINAE_EXPR
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} // namespace detail
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#else // defined(BOOST_RESULT_OF_USE_DECLTYPE) || defined(BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK)
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#if !BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x551))
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template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct result_of<F(BOOST_RESULT_OF_ARGS)>
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: tr1_result_of<F(BOOST_RESULT_OF_ARGS)> { };
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#endif
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#endif // defined(BOOST_RESULT_OF_USE_DECLTYPE)
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#undef BOOST_RESULT_OF_ARGS
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#if BOOST_PP_ITERATION() >= 1
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namespace detail {
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template<typename R, typename FArgs BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct tr1_result_of_impl<R (*)(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), FArgs, false>
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{
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typedef R type;
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};
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template<typename R, typename FArgs BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct tr1_result_of_impl<R (&)(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), FArgs, false>
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{
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typedef R type;
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};
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#if !BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x551))
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template<typename R, typename FArgs BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct tr1_result_of_impl<R (T0::*)
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(BOOST_PP_ENUM_SHIFTED_PARAMS(BOOST_PP_ITERATION(),T)),
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FArgs, false>
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{
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typedef R type;
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};
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template<typename R, typename FArgs BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct tr1_result_of_impl<R (T0::*)
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(BOOST_PP_ENUM_SHIFTED_PARAMS(BOOST_PP_ITERATION(),T))
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const,
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FArgs, false>
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{
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typedef R type;
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};
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template<typename R, typename FArgs BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct tr1_result_of_impl<R (T0::*)
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(BOOST_PP_ENUM_SHIFTED_PARAMS(BOOST_PP_ITERATION(),T))
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volatile,
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FArgs, false>
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{
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typedef R type;
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};
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template<typename R, typename FArgs BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct tr1_result_of_impl<R (T0::*)
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(BOOST_PP_ENUM_SHIFTED_PARAMS(BOOST_PP_ITERATION(),T))
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const volatile,
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FArgs, false>
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{
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typedef R type;
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};
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#endif
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}
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#endif
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