1 /////////////////////////////////////////////////////////////////////////////// 2 // as_matcher.hpp 3 // 4 // Copyright 2008 Eric Niebler. Distributed under the Boost 5 // Software License, Version 1.0. (See accompanying file 6 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 7 8 #ifndef BOOST_XPRESSIVE_DETAIL_STATIC_TRANSFORMS_AS_MATCHER_HPP_EAN_04_01_2007 9 #define BOOST_XPRESSIVE_DETAIL_STATIC_TRANSFORMS_AS_MATCHER_HPP_EAN_04_01_2007 10 11 // MS compatible compilers support #pragma once 12 #if defined(_MSC_VER) 13 # pragma once 14 #endif 15 16 #include <boost/mpl/assert.hpp> 17 #include <boost/xpressive/detail/detail_fwd.hpp> 18 #include <boost/xpressive/detail/static/static.hpp> 19 20 namespace boost { namespace xpressive { namespace grammar_detail 21 { 22 struct as_matcher : proto::transform<as_matcher> 23 { 24 template<typename Expr, typename State, typename Data> 25 struct impl : proto::transform_impl<Expr, State, Data> 26 { 27 typedef typename impl::data data_type; 28 29 typedef 30 typename data_type::template apply< 31 typename proto::result_of::value<typename impl::expr>::type 32 >::type 33 result_type; 34 operator ()boost::xpressive::grammar_detail::as_matcher::impl35 result_type operator ()( 36 typename impl::expr_param expr 37 , typename impl::state_param 38 , typename impl::data_param data 39 ) const 40 { 41 return data.call(proto::value(expr)); 42 } 43 }; 44 }; 45 46 }}} 47 48 #endif 49