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148 lines
5.0 KiB
148 lines
5.0 KiB
// 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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