ceph/src/boost/libs/parameter/include/boost/parameter/aux_/result_of0.hpp

   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