1 // Copyright David Abrahams 2005. Distributed under the Boost

     2 // Software License, Version 1.0. (See accompanying

     3 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

     4 #ifndef BOOST_PARAMETER_AUX_RESULT_OF0_DWA2005511_HPP

     5 # define BOOST_PARAMETER_AUX_RESULT_OF0_DWA2005511_HPP

     6 

     7 # include <boost/utility/result_of.hpp>

     8 

     9 // A metafunction returning the result of invoking a nullary function

    10 // object of the given type.

    11 

    12 #ifndef BOOST_NO_RESULT_OF

    13 

    14 # include <boost/utility/result_of.hpp>

    15 namespace boost { namespace parameter { namespace aux { 

    16 template <class F>

    17 struct result_of0 : result_of<F()>

    18 {};

    19 

    20 }}} // namespace boost::parameter::aux_

    21 

    22 #else

    23 

    24 namespace boost { namespace parameter { namespace aux { 

    25 template <class F>

    26 struct result_of0

    27 {

    28     typedef typename F::result_type type;

    29 };

    30 

    31 }}} // namespace boost::parameter::aux_

    32 

    33 #endif 

    34 

    35 

    36 #endif // BOOST_PARAMETER_AUX_RESULT_OF0_DWA2005511_HPP