149 lines
5.2 KiB
C++
149 lines
5.2 KiB
C++
// 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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// 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(__BORLANDC__, BOOST_TESTED_AT(0x551))
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template<typename F BOOST_PP_COMMA_IF(BOOST_PP_ITERATION())
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BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct tr1_result_of<F(BOOST_RESULT_OF_ARGS)>
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: mpl::if_<
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mpl::or_< is_pointer<F>, is_member_function_pointer<F> >
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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::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::has_result_type<F>::value)> >::type { };
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#endif
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#if !defined(BOOST_NO_DECLTYPE) && defined(BOOST_RESULT_OF_USE_DECLTYPE)
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// As of N2588, C++0x result_of only supports function call
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// expressions of the form f(x). This precludes support for member
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// function pointers, which are invoked with expressions of the form
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// o->*f(x). This implementation supports both.
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template<typename F BOOST_PP_COMMA_IF(BOOST_PP_ITERATION())
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BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),typename T)>
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struct result_of<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T))>
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: mpl::if_<
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mpl::or_< is_pointer<F>, is_member_function_pointer<F> >
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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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namespace detail {
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# define BOOST_RESULT_OF_STATIC_MEMBERS(z, n, _) \
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static T ## n t ## n; \
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/**/
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template<typename F BOOST_PP_COMMA_IF(BOOST_PP_ITERATION())
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BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),typename T)>
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class cpp0x_result_of_impl<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T))>
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{
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static F f;
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BOOST_PP_REPEAT(BOOST_PP_ITERATION(), BOOST_RESULT_OF_STATIC_MEMBERS, _)
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public:
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typedef decltype(f(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),t))) type;
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};
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} // namespace detail
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#else // defined(BOOST_NO_DECLTYPE)
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#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
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template<typename F BOOST_PP_COMMA_IF(BOOST_PP_ITERATION())
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BOOST_PP_ENUM_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_NO_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_COMMA_IF(BOOST_PP_ITERATION())
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BOOST_PP_ENUM_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_COMMA_IF(BOOST_PP_ITERATION())
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BOOST_PP_ENUM_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(__BORLANDC__, BOOST_TESTED_AT(0x551))
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template<typename R, typename FArgs BOOST_PP_COMMA_IF(BOOST_PP_ITERATION())
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BOOST_PP_ENUM_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_COMMA_IF(BOOST_PP_ITERATION())
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BOOST_PP_ENUM_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_COMMA_IF(BOOST_PP_ITERATION())
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BOOST_PP_ENUM_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_COMMA_IF(BOOST_PP_ITERATION())
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BOOST_PP_ENUM_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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