ceph/src/boost/libs/spirit/include/boost/spirit/home/lex/qi/plain_tokenid.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_TOKENID_NOV_26_2010_0944AM)
   7 #define BOOST_SPIRIT_LEX_PLAIN_TOKENID_NOV_26_2010_0944AM
   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/mpl/and.hpp>
  27 #include <boost/type_traits/is_integral.hpp>
  28 #include <boost/type_traits/is_enum.hpp>
  29 #include <boost/lexical_cast.hpp>
  30
  31 namespace boost { namespace spirit
  32 {
  33     ///////////////////////////////////////////////////////////////////////////
  34     // Enablers
  35     ///////////////////////////////////////////////////////////////////////////
  36
  37     // enables tokenid
  38     template <>
  39     struct use_terminal<qi::domain, tag::tokenid>
  40       : mpl::true_ {};
  41
  42     // enables tokenid(id)
  43     template <typename A0>
  44     struct use_terminal<qi::domain
  45       , terminal_ex<tag::tokenid, fusion::vector1<A0> >
  46     > : mpl::or_<is_integral<A0>, is_enum<A0> > {};
  47
  48     // enables tokenid(idmin, idmax)
  49     template <typename A0, typename A1>
  50     struct use_terminal<qi::domain
  51       , terminal_ex<tag::tokenid, fusion::vector2<A0, A1> >
  52     > : mpl::and_<
  53             mpl::or_<is_integral<A0>, is_enum<A0> >
  54           , mpl::or_<is_integral<A1>, is_enum<A1> >
  55         > {};
  56
  57     // enables *lazy* tokenid(id)
  58     template <>
  59     struct use_lazy_terminal<
  60         qi::domain, tag::tokenid, 1
  61     > : mpl::true_ {};
  62
  63     // enables *lazy* tokenid(idmin, idmax)
  64     template <>
  65     struct use_lazy_terminal<
  66         qi::domain, tag::tokenid, 2
  67     > : mpl::true_ {};
  68 }}
  69
  70 namespace boost { namespace spirit { namespace qi
  71 {
  72 #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
  73     using spirit::tokenid;
  74 #endif
  75     using spirit::tokenid_type;
  76
  77     ///////////////////////////////////////////////////////////////////////////
  78     // The plain_tokenid represents a simple token defined by the lexer inside
  79     // a Qi grammar. The difference to plain_token is that it exposes the
  80     // matched token id instead of the iterator_range of the matched input.
  81     template <typename TokenId>
  82     struct plain_tokenid
  83       : primitive_parser<plain_tokenid<TokenId> >
  84     {
  85         template <typename Context, typename Iterator>
  86         struct attribute
  87         {
  88             typedef TokenId type;
  89         };
  90
  91         plain_tokenid(TokenId const& id)
  92           : id(id) {}
  93
  94         template <typename Iterator, typename Context
  95           , typename Skipper, typename Attribute>
  96         bool parse(Iterator& first, Iterator const& last
  97           , Context& /*context*/, Skipper const& skipper
  98           , Attribute& attr) const
  99         {
 100             qi::skip_over(first, last, skipper);   // always do a pre-skip
 101
 102             if (first != last) {
 103                 // simply match the token id with the id this component has
 104                 // been initialized with
 105
 106                 typedef typename
 107                     boost::detail::iterator_traits<Iterator>::value_type
 108                 token_type;
 109                 typedef typename token_type::id_type id_type;
 110
 111                 token_type const& t = *first;
 112                 if (id_type(~0) == id_type(id) || id_type(id) == t.id()) {
 113                     spirit::traits::assign_to(id, attr);
 114                     ++first;
 115                     return true;
 116                 }
 117             }
 118             return false;
 119         }
 120
 121         template <typename Context>
 122         info what(Context& /*context*/) const
 123         {
 124             return info("tokenid",
 125                 "tokenid(" + boost::lexical_cast<utf8_string>(id) + ")");
 126         }
 127
 128         TokenId id;
 129     };
 130
 131     ///////////////////////////////////////////////////////////////////////////
 132     template <typename TokenId>
 133     struct plain_tokenid_range
 134       : primitive_parser<plain_tokenid_range<TokenId> >
 135     {
 136         template <typename Context, typename Iterator>
 137         struct attribute
 138         {
 139             typedef TokenId type;
 140         };
 141
 142         plain_tokenid_range(TokenId const& idmin, TokenId const& idmax)
 143           : idmin(idmin), idmax(idmax) {}
 144
 145         template <typename Iterator, typename Context
 146           , typename Skipper, typename Attribute>
 147         bool parse(Iterator& first, Iterator const& last
 148           , Context& /*context*/, Skipper const& skipper
 149           , Attribute& attr) const
 150         {
 151             qi::skip_over(first, last, skipper);   // always do a pre-skip
 152
 153             if (first != last) {
 154                 // simply match the token id with the id this component has
 155                 // been initialized with
 156
 157                 typedef typename
 158                     boost::detail::iterator_traits<Iterator>::value_type
 159                 token_type;
 160                 typedef typename token_type::id_type id_type;
 161
 162                 token_type const& t = *first;
 163                 if (id_type(idmin) >= t.id() && id_type(idmin) <= t.id())
 164                 {
 165                     spirit::traits::assign_to(t.id(), attr);
 166                     ++first;
 167                     return true;
 168                 }
 169             }
 170             return false;
 171         }
 172
 173         template <typename Context>
 174         info what(Context& /*context*/) const
 175         {
 176             return info("tokenid_range"
 177               , "token(" +
 178                     boost::lexical_cast<utf8_string>(idmin) + ", " +
 179                     boost::lexical_cast<utf8_string>(idmax) + ")"
 180             );
 181         }
 182
 183         TokenId idmin, idmax;
 184     };
 185
 186     ///////////////////////////////////////////////////////////////////////////
 187     // Parser generators: make_xxx function (objects)
 188     ///////////////////////////////////////////////////////////////////////////
 189     template <typename Modifiers>
 190     struct make_primitive<tag::tokenid, Modifiers>
 191     {
 192         typedef plain_tokenid<std::size_t> result_type;
 193
 194         result_type operator()(unused_type, unused_type) const
 195         {
 196             return result_type(std::size_t(~0));
 197         }
 198     };
 199
 200     template <typename Modifiers, typename TokenId>
 201     struct make_primitive<terminal_ex<tag::tokenid, fusion::vector1<TokenId> >
 202       , Modifiers>
 203     {
 204         typedef plain_tokenid<TokenId> result_type;
 205
 206         template <typename Terminal>
 207         result_type operator()(Terminal const& term, unused_type) const
 208         {
 209             return result_type(fusion::at_c<0>(term.args));
 210         }
 211     };
 212
 213     template <typename Modifiers, typename TokenId>
 214     struct make_primitive<terminal_ex<tag::tokenid, fusion::vector2<TokenId, TokenId> >
 215       , Modifiers>
 216     {
 217         typedef plain_tokenid_range<TokenId> result_type;
 218
 219         template <typename Terminal>
 220         result_type operator()(Terminal const& term, unused_type) const
 221         {
 222             return result_type(fusion::at_c<0>(term.args)
 223               , fusion::at_c<1>(term.args));
 224         }
 225     };
 226 }}}
 227
 228 namespace boost { namespace spirit { namespace traits
 229 {
 230     ///////////////////////////////////////////////////////////////////////////
 231     template<typename Idtype, typename Attr, typename Context, typename Iterator>
 232     struct handles_container<qi::plain_tokenid<Idtype>, Attr, Context, Iterator>
 233       : mpl::true_
 234     {};
 235
 236     template<typename Idtype, typename Attr, typename Context, typename Iterator>
 237     struct handles_container<qi::plain_tokenid_range<Idtype>, Attr, Context, Iterator>
 238       : mpl::true_
 239     {};
 240 }}}
 241
 242 #endif