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- // (C) Copyright Tobias Schwinger
- //
- // Use modification and distribution are subject to the boost Software License,
- // Version 1.0. (See http://www.boost.org/LICENSE_1_0.txt).
- //------------------------------------------------------------------------------
- #ifndef BOOST_FT_RESULT_TYPE_HPP_INCLUDED
- #define BOOST_FT_RESULT_TYPE_HPP_INCLUDED
- #include <boost/blank.hpp>
- #include <boost/mpl/if.hpp>
- #include <boost/mpl/aux_/lambda_support.hpp>
- #include <boost/mpl/at.hpp>
- #include <boost/function_types/is_callable_builtin.hpp>
- #include <boost/function_types/components.hpp>
- namespace boost
- {
- namespace function_types
- {
- template< typename T > struct result_type;
- namespace detail
- {
- template<typename T> struct result_type_impl
- : mpl::at_c
- < typename function_types::components<T>::types, 0 >
- { };
- }
- template<typename T> struct result_type
- : mpl::if_
- < function_types::is_callable_builtin<T>
- , detail::result_type_impl<T>, boost::blank
- >::type
- {
- BOOST_MPL_AUX_LAMBDA_SUPPORT(1,result_type,(T))
- };
- }
- }
- #endif
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