ceph/src/boost/libs/spirit/include/boost/spirit/home/lex/qi/plain_raw_token.hpp

   1 //  Copyright (c) 2001-2011 Hartmut Kaiser
   2 //
   3 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #if !defined(BOOST_SPIRIT_LEX_PLAIN_RAW_TOKEN_JUN_03_2011_0853PM)
   7 #define BOOST_SPIRIT_LEX_PLAIN_RAW_TOKEN_JUN_03_2011_0853PM
   8
   9 #if defined(_MSC_VER)
  10 #pragma once
  11 #endif
  12
  13 #include <boost/spirit/home/support/info.hpp>
  14 #include <boost/spirit/home/qi/detail/attributes.hpp>
  15 #include <boost/spirit/home/support/common_terminals.hpp>
  16 #include <boost/spirit/home/support/handles_container.hpp>
  17 #include <boost/spirit/home/qi/skip_over.hpp>
  18 #include <boost/spirit/home/qi/domain.hpp>
  19 #include <boost/spirit/home/qi/parser.hpp>
  20 #include <boost/spirit/home/qi/meta_compiler.hpp>
  21 #include <boost/spirit/home/qi/detail/assign_to.hpp>
  22 #include <boost/range/iterator_range.hpp>
  23 #include <boost/fusion/include/vector.hpp>
  24 #include <boost/fusion/include/at.hpp>
  25 #include <boost/mpl/or.hpp>
  26 #include <boost/type_traits/is_integral.hpp>
  27 #include <boost/type_traits/is_enum.hpp>
  28 #include <boost/lexical_cast.hpp>
  29
  30 namespace boost { namespace spirit
  31 {
  32     ///////////////////////////////////////////////////////////////////////////
  33     // Enablers
  34     ///////////////////////////////////////////////////////////////////////////
  35
  36     // enables raw_token
  37     template <>
  38     struct use_terminal<qi::domain, tag::raw_token>
  39       : mpl::true_ {};
  40
  41     // enables raw_token(id)
  42     template <typename A0>
  43     struct use_terminal<qi::domain
  44       , terminal_ex<tag::raw_token, fusion::vector1<A0> >
  45     > : mpl::or_<is_integral<A0>, is_enum<A0> > {};
  46
  47     // enables *lazy* raw_token(id)
  48     template <>
  49     struct use_lazy_terminal<
  50         qi::domain, tag::raw_token, 1
  51     > : mpl::true_ {};
  52 }}
  53
  54 namespace boost { namespace spirit { namespace qi
  55 {
  56 #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
  57     using spirit::raw_token;
  58 #endif
  59     using spirit::raw_token_type;
  60
  61     ///////////////////////////////////////////////////////////////////////////
  62     template <typename TokenId>
  63     struct plain_raw_token
  64       : primitive_parser<plain_raw_token<TokenId> >
  65     {
  66         template <typename Context, typename Iterator>
  67         struct attribute
  68         {
  69             typedef unused_type type;
  70         };
  71
  72         plain_raw_token(TokenId const& id)
  73           : id(id) {}
  74
  75         template <typename Iterator, typename Context
  76           , typename Skipper, typename Attribute>
  77         bool parse(Iterator& first, Iterator const& last
  78           , Context& /*context*/, Skipper const& skipper
  79           , Attribute& attr) const
  80         {
  81             qi::skip_over(first, last, skipper);   // always do a pre-skip
  82
  83             if (first != last) {
  84                 // simply match the token id with the id this component has
  85                 // been initialized with
  86
  87                 typedef typename
  88                     boost::detail::iterator_traits<Iterator>::value_type
  89                 token_type;
  90                 typedef typename token_type::id_type id_type;
  91
  92                 token_type const& t = *first;
  93                 if (id_type(~0) == id_type(id) || id_type(id) == t.id()) {
  94                     spirit::traits::assign_to(t, attr);
  95                     ++first;
  96                     return true;
  97                 }
  98             }
  99             return false;
 100         }
 101
 102         template <typename Context>
 103         info what(Context& /*context*/) const
 104         {
 105             return info("raw_token",
 106                 "raw_token(" + boost::lexical_cast<utf8_string>(id) + ")");
 107         }
 108
 109         TokenId id;
 110     };
 111
 112     ///////////////////////////////////////////////////////////////////////////
 113     // Parser generators: make_xxx function (objects)
 114     ///////////////////////////////////////////////////////////////////////////
 115     template <typename Modifiers>
 116     struct make_primitive<tag::raw_token, Modifiers>
 117     {
 118         typedef plain_raw_token<std::size_t> result_type;
 119
 120         result_type operator()(unused_type, unused_type) const
 121         {
 122             return result_type(std::size_t(~0));
 123         }
 124     };
 125
 126     template <typename Modifiers, typename TokenId>
 127     struct make_primitive<terminal_ex<tag::raw_token, fusion::vector1<TokenId> >
 128       , Modifiers>
 129     {
 130         typedef plain_raw_token<TokenId> result_type;
 131
 132         template <typename Terminal>
 133         result_type operator()(Terminal const& term, unused_type) const
 134         {
 135             return result_type(fusion::at_c<0>(term.args));
 136         }
 137     };
 138 }}}
 139
 140 namespace boost { namespace spirit { namespace traits
 141 {
 142     ///////////////////////////////////////////////////////////////////////////
 143     template<typename Idtype, typename Attr, typename Context, typename Iterator>
 144     struct handles_container<qi::plain_raw_token<Idtype>, Attr, Context, Iterator>
 145       : mpl::true_
 146     {};
 147 }}}
 148
 149 #endif