Chris@16: 
Chris@16: //  (C) Copyright Edward Diener 2012,2013
Chris@16: //  Use, modification and distribution are subject to the Boost Software License,
Chris@16: //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: //  http://www.boost.org/LICENSE_1_0.txt).
Chris@16: 
Chris@16: #if !defined(BOOST_TTI_DETAIL_PLACEHOLDER_HPP)
Chris@16: #define BOOST_TTI_DETAIL_PLACEHOLDER_HPP
Chris@16: 
Chris@16: #include <boost/mpl/lambda.hpp>
Chris@16: #include <boost/mpl/not.hpp>
Chris@16: #include <boost/type_traits/is_same.hpp>
Chris@16: 
Chris@16: namespace boost
Chris@16:   {
Chris@16:   namespace tti
Chris@16:     {
Chris@16:     namespace detail
Chris@16:       {
Chris@16:       template <class BOOST_TTI_DETAIL_TP_T>
Chris@16:       struct is_placeholder_expression :
Chris@16:         boost::mpl::not_
Chris@16:           <
Chris@16:           boost::is_same
Chris@16:             <
Chris@16:             typename boost::mpl::lambda<BOOST_TTI_DETAIL_TP_T>::type,
Chris@16:             BOOST_TTI_DETAIL_TP_T
Chris@16:             >
Chris@16:           >
Chris@16:         {
Chris@16:         };
Chris@16:       }
Chris@16:     }
Chris@16:   }
Chris@16:   
Chris@16: #endif // BOOST_TTI_DETAIL_PLACEHOLDER_HPP