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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 #if !defined(BOOST_SPIRIT_LEX_PLAIN_RAW_TOKEN_JUN_03_2011_0853PM)
0007 #define BOOST_SPIRIT_LEX_PLAIN_RAW_TOKEN_JUN_03_2011_0853PM
0008 
0009 #if defined(_MSC_VER)
0010 #pragma once
0011 #endif
0012 
0013 #include <boost/spirit/home/support/info.hpp>
0014 #include <boost/spirit/home/qi/detail/attributes.hpp>
0015 #include <boost/spirit/home/support/common_terminals.hpp>
0016 #include <boost/spirit/home/support/handles_container.hpp>
0017 #include <boost/spirit/home/qi/skip_over.hpp>
0018 #include <boost/spirit/home/qi/domain.hpp>
0019 #include <boost/spirit/home/qi/parser.hpp>
0020 #include <boost/spirit/home/qi/meta_compiler.hpp>
0021 #include <boost/spirit/home/qi/detail/assign_to.hpp>
0022 #include <boost/fusion/include/vector.hpp>
0023 #include <boost/fusion/include/at.hpp>
0024 #include <boost/mpl/or.hpp>
0025 #include <boost/type_traits/is_integral.hpp>
0026 #include <boost/type_traits/is_enum.hpp>
0027 #include <iterator> // for std::iterator_traits
0028 #include <sstream>
0029 
0030 namespace boost { namespace spirit
0031 {
0032     ///////////////////////////////////////////////////////////////////////////
0033     // Enablers
0034     ///////////////////////////////////////////////////////////////////////////
0035 
0036     // enables raw_token
0037     template <>
0038     struct use_terminal<qi::domain, tag::raw_token>
0039       : mpl::true_ {};
0040 
0041     // enables raw_token(id)
0042     template <typename A0>
0043     struct use_terminal<qi::domain
0044       , terminal_ex<tag::raw_token, fusion::vector1<A0> >
0045     > : mpl::or_<is_integral<A0>, is_enum<A0> > {};
0046 
0047     // enables *lazy* raw_token(id)
0048     template <>
0049     struct use_lazy_terminal<
0050         qi::domain, tag::raw_token, 1
0051     > : mpl::true_ {};
0052 }}
0053 
0054 namespace boost { namespace spirit { namespace qi
0055 {
0056 #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
0057     using spirit::raw_token;
0058 #endif
0059     using spirit::raw_token_type;
0060 
0061     ///////////////////////////////////////////////////////////////////////////
0062     template <typename TokenId>
0063     struct plain_raw_token
0064       : primitive_parser<plain_raw_token<TokenId> >
0065     {
0066         template <typename Context, typename Iterator>
0067         struct attribute
0068         {
0069             typedef unused_type type;
0070         };
0071 
0072         plain_raw_token(TokenId const& id)
0073           : id(id) {}
0074 
0075         template <typename Iterator, typename Context
0076           , typename Skipper, typename Attribute>
0077         bool parse(Iterator& first, Iterator const& last
0078           , Context& /*context*/, Skipper const& skipper
0079           , Attribute& attr) const
0080         {
0081             qi::skip_over(first, last, skipper);   // always do a pre-skip
0082 
0083             if (first != last) {
0084                 // simply match the token id with the id this component has
0085                 // been initialized with
0086 
0087                 typedef typename
0088                     std::iterator_traits<Iterator>::value_type
0089                 token_type;
0090                 typedef typename token_type::id_type id_type;
0091 
0092                 token_type const& t = *first;
0093                 if (id_type(~0) == id_type(id) || id_type(id) == t.id()) {
0094                     spirit::traits::assign_to(t, attr);
0095                     ++first;
0096                     return true;
0097                 }
0098             }
0099             return false;
0100         }
0101 
0102         template <typename Context>
0103         info what(Context& /*context*/) const
0104         {
0105             std::stringstream ss;
0106             ss << "raw_token(" << id << ")";
0107             return info("raw_token", ss.str());
0108         }
0109 
0110         TokenId id;
0111     };
0112 
0113     ///////////////////////////////////////////////////////////////////////////
0114     // Parser generators: make_xxx function (objects)
0115     ///////////////////////////////////////////////////////////////////////////
0116     template <typename Modifiers>
0117     struct make_primitive<tag::raw_token, Modifiers>
0118     {
0119         typedef plain_raw_token<std::size_t> result_type;
0120 
0121         result_type operator()(unused_type, unused_type) const
0122         {
0123             return result_type(std::size_t(~0));
0124         }
0125     };
0126 
0127     template <typename Modifiers, typename TokenId>
0128     struct make_primitive<terminal_ex<tag::raw_token, fusion::vector1<TokenId> >
0129       , Modifiers>
0130     {
0131         typedef plain_raw_token<TokenId> result_type;
0132 
0133         template <typename Terminal>
0134         result_type operator()(Terminal const& term, unused_type) const
0135         {
0136             return result_type(fusion::at_c<0>(term.args));
0137         }
0138     };
0139 }}}
0140 
0141 namespace boost { namespace spirit { namespace traits
0142 {
0143     ///////////////////////////////////////////////////////////////////////////
0144     template<typename Idtype, typename Attr, typename Context, typename Iterator>
0145     struct handles_container<qi::plain_raw_token<Idtype>, Attr, Context, Iterator>
0146       : mpl::true_
0147     {};
0148 }}}
0149 
0150 #endif