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 // For more information, see http://www.boost.org/libs/utility
9 #ifndef BOOST_RESULT_OF_HPP
10 #define BOOST_RESULT_OF_HPP
12 #include <boost/config.hpp>
13 #include <boost/type_traits/ice.hpp>
14 #include <boost/type.hpp>
15 #include <boost/preprocessor.hpp>
16 #include <boost/detail/workaround.hpp>
17 #include <boost/mpl/has_xxx.hpp>
19 #ifndef BOOST_RESULT_OF_NUM_ARGS
20 # define BOOST_RESULT_OF_NUM_ARGS 10
25 template<typename F> struct result_of;
27 #if !defined(BOOST_NO_SFINAE) && !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
30 BOOST_MPL_HAS_XXX_TRAIT_DEF(result_type)
32 template<typename F, typename FArgs, bool HasResultType> struct get_result_of;
34 template<typename F, typename FArgs>
35 struct get_result_of<F, FArgs, true>
37 typedef typename F::result_type type;
40 template<typename F, typename FArgs>
41 struct get_result_of<F, FArgs, false>
43 typedef typename F::template result<FArgs>::type type;
47 struct get_result_of<F, F(void), false>
52 template<typename F, typename FArgs>
53 struct result_of : get_result_of<F, FArgs, (has_result_type<F>::value)> {};
55 } // end namespace detail
57 #define BOOST_PP_ITERATION_PARAMS_1 (3,(0,BOOST_RESULT_OF_NUM_ARGS,<boost/utility/detail/result_of_iterate.hpp>))
58 #include BOOST_PP_ITERATE()
61 # define BOOST_NO_RESULT_OF 1
66 #endif // BOOST_RESULT_OF_HPP