// Copyright (c) 2001-2011 Hartmut Kaiser // Copyright (c) 2001-2011 Joel de Guzman // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) #if !defined(BOOST_SPIRIT_LEX_META_COMPILER_APR_20_2009_0756PM) #define BOOST_SPIRIT_LEX_META_COMPILER_APR_20_2009_0756PM #if defined(_MSC_VER) #pragma once #endif #include #include #include #include #include namespace boost { namespace spirit { template struct use_terminal >::type> // enables lexers : mpl::true_ {}; namespace lex { template struct make_primitive // by default, return it as-is { typedef T result_type; template T_& operator()(T_& val, unused_type) const { return val; } template T_ const& operator()(T_ const& val, unused_type) const { return val; } }; template struct make_composite; } // Lex primitive meta-compiler template <> struct make_component { template struct result; template struct result { typedef typename lex::make_primitive< typename remove_const::type, typename remove_reference::type>::result_type type; }; template typename result::type operator()(Elements const& elements, Modifiers const& modifiers) const { typedef typename remove_const::type term; return lex::make_primitive()(elements.car, modifiers); } }; // Lex composite meta-compiler template struct make_component { template struct result; template struct result { typedef typename lex::make_composite::type>::result_type type; }; template typename result::type operator()(Elements const& elements, Modifiers const& modifiers) const { return lex::make_composite()( elements, modifiers); } }; }} #endif