lex/lexer/sequence.hpp

0001 //  Copyright (c) 2001-2011 Hartmut Kaiser
0002 //
0003 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
0004 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0005
0006 #ifndef BOOST_SPIRIT_LEX_LEXER_SEQUENCE_HPP
0007 #define BOOST_SPIRIT_LEX_LEXER_SEQUENCE_HPP
0008
0009 #if defined(_MSC_VER)
0010 #pragma once
0011 #endif
0012
0013 #include <boost/spirit/home/lex/domain.hpp>
0014 #include <boost/spirit/home/lex/lexer_type.hpp>
0015 #include <boost/spirit/home/lex/meta_compiler.hpp>
0016 #include <boost/spirit/home/lex/detail/sequence_function.hpp>
0017 #include <boost/fusion/include/any.hpp>
0018 #include <boost/proto/operators.hpp>
0019 #include <boost/proto/tags.hpp>
0020
0021 namespace boost { namespace spirit
0022 {
0023     ///////////////////////////////////////////////////////////////////////////
0024     // Enablers
0025     ///////////////////////////////////////////////////////////////////////////
0026     template <>
0027     struct use_operator<lex::domain, proto::tag::bitwise_or>  // enables |
0028       : mpl::true_ {};
0029
0030     template <>
0031     struct flatten_tree<lex::domain, proto::tag::bitwise_or>  // flattens |
0032       : mpl::true_ {};
0033
0034 }}
0035
0036 namespace boost { namespace spirit { namespace lex
0037 {
0038     template <typename Elements>
0039     struct sequence : nary_lexer<sequence<Elements> >
0040     {
0041         sequence(Elements const& elements)
0042           : elements(elements) {}
0043
0044         template <typename LexerDef, typename String>
0045         void collect(LexerDef& lexdef, String const& state
0046           , String const& targetstate) const
0047         {
0048             typedef detail::sequence_collect_function<LexerDef, String>
0049                 collect_function_type;
0050             collect_function_type f (lexdef, state, targetstate);
0051             fusion::any(elements, f);
0052         }
0053
0054         template <typename LexerDef>
0055         void add_actions(LexerDef& lexdef) const
0056         {
0057             detail::sequence_add_actions_function<LexerDef> f (lexdef);
0058             fusion::any(elements, f);
0059         }
0060
0061         Elements elements;
0062     };
0063
0064     ///////////////////////////////////////////////////////////////////////////
0065     // Lexer generator: make_xxx function (objects)
0066     ///////////////////////////////////////////////////////////////////////////
0067     template <typename Elements, typename Modifiers>
0068     struct make_composite<proto::tag::bitwise_or, Elements, Modifiers>
0069       : make_nary_composite<Elements, sequence>
0070     {};
0071
0072 }}} // namespace boost::spirit::lex
0073
0074 #endif