Boost C++ Libraries of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for an old version of Boost. Click here to view this page for the latest version.


// (C) Copyright Tobias Schwinger
// Use modification and distribution are subject to the boost Software License,
// Version 1.0. (See



#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