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).
7 #if !defined(BOOST_TTI_DETAIL_PLACEHOLDER_HPP)
8 #define BOOST_TTI_DETAIL_PLACEHOLDER_HPP
10 #include <boost/mpl/lambda.hpp>
11 #include <boost/mpl/not.hpp>
12 #include <boost/type_traits/is_same.hpp>
20 template <class BOOST_TTI_DETAIL_TP_T>
21 struct is_placeholder_expression :
26 typename boost::mpl::lambda<BOOST_TTI_DETAIL_TP_T>::type,
36 #endif // BOOST_TTI_DETAIL_PLACEHOLDER_HPP