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// 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_LEXER_TYPE_APR_20_2009_0759PM) #define BOOST_SPIRIT_LEXER_TYPE_APR_20_2009_0759PM #if defined(_MSC_VER) #pragma once #endif #include <boost/mpl/has_xxx.hpp> #include <boost/spirit/home/lex/domain.hpp> namespace boost { namespace spirit { namespace lex { template <typename Derived> struct lexer_type { struct lexer_id; typedef Derived derived_type; typedef lex::domain domain; // Requirement: l.collect(def, state, targetstate) -> void // // l: a lexer component // def: token definition container // state: lexer state this token definition needs to be added to // targetstate: an optional lexer state the lexer should be switched // into after matching this token Derived const& derived() const { return *static_cast<Derived const*>(this); } }; template <typename Derived> struct primitive_lexer : lexer_type<Derived> { struct primitive_lexer_id; }; template <typename Derived> struct unary_lexer : lexer_type<Derived> { struct unary_lexer_id; // Requirement: l.subject -> subject lexer component // // l: a unary lexer component // Requirement: L::subject_type -> subject lexer component type // // L: a unary lexer component type }; template <typename Derived> struct nary_lexer : lexer_type<Derived> { struct nary_lexer_id; // Requirement: l.elements -> fusion sequence // // l: a composite lexer component // Requirement: L::elements_type -> fusion sequence // // L: a composite lexer component type }; }}} namespace boost { namespace spirit { namespace traits // classification { namespace detail { BOOST_MPL_HAS_XXX_TRAIT_DEF(lexer_id) BOOST_MPL_HAS_XXX_TRAIT_DEF(primitive_lexer_id) BOOST_MPL_HAS_XXX_TRAIT_DEF(unary_lexer_id) BOOST_MPL_HAS_XXX_TRAIT_DEF(nary_lexer_id) } template <typename T> struct is_lexer : detail::has_lexer_id<T> {}; template <typename T> struct is_primitive_lexer : detail::has_primitive_lexer_id<T> {}; template <typename T> struct is_unary_lexer : detail::has_unary_lexer_id<T> {}; template <typename T> struct is_nary_lexer : detail::has_nary_lexer_id<T> {}; }}} #endif
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