ceph/src/boost/libs/tti/include/boost/tti/detail/dplaceholder.hpp

   1
   2 //  (C) Copyright Edward Diener 2012,2013
   3 //  Use, modification and distribution are subject to the Boost Software License,
   4 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   5 //  http://www.boost.org/LICENSE_1_0.txt).
   6
   7 #if !defined(BOOST_TTI_DETAIL_PLACEHOLDER_HPP)
   8 #define BOOST_TTI_DETAIL_PLACEHOLDER_HPP
   9
  10 #include <boost/mpl/lambda.hpp>
  11 #include <boost/mpl/not.hpp>
  12 #include <boost/type_traits/is_same.hpp>
  13
  14 namespace boost
  15   {
  16   namespace tti
  17     {
  18     namespace detail
  19       {
  20       template <class BOOST_TTI_DETAIL_TP_T>
  21       struct is_placeholder_expression :
  22         boost::mpl::not_
  23           <
  24           boost::is_same
  25             <
  26             typename boost::mpl::lambda<BOOST_TTI_DETAIL_TP_T>::type,
  27             BOOST_TTI_DETAIL_TP_T
  28             >
  29           >
  30         {
  31         };
  32       }
  33     }
  34   }
  35
  36 #endif // BOOST_TTI_DETAIL_PLACEHOLDER_HPP