ceph/src/boost/boost/spirit/home/lex/qi/plain_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_TOKEN_NOV_11_2007_0451PM)
   7 #define BOOST_SPIRIT_LEX_PLAIN_TOKEN_NOV_11_2007_0451PM
   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 token
  38     template <>
  39     struct use_terminal<qi::domain, tag::token>
  40       : mpl::true_ {};
  41
  42     // enables token(id)
  43     template <typename A0>
  44     struct use_terminal<qi::domain
  45       , terminal_ex<tag::token, fusion::vector1<A0> >
  46     > : mpl::or_<is_integral<A0>, is_enum<A0> > {};
  47
  48     // enables token(idmin, idmax)
  49     template <typename A0, typename A1>
  50     struct use_terminal<qi::domain
  51       , terminal_ex<tag::token, 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* token(id)
  58     template <>
  59     struct use_lazy_terminal<
  60         qi::domain, tag::token, 1
  61     > : mpl::true_ {};
  62
  63     // enables *lazy* token(idmin, idmax)
  64     template <>
  65     struct use_lazy_terminal<
  66         qi::domain, tag::token, 2
  67     > : mpl::true_ {};
  68 }}
  69
  70 namespace boost { namespace spirit { namespace qi
  71 {
  72 #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
  73     using spirit::token;
  74 #endif
  75     using spirit::token_type;
  76
  77     ///////////////////////////////////////////////////////////////////////////
  78     template <typename TokenId>
  79     struct plain_token
  80       : primitive_parser<plain_token<TokenId> >
  81     {
  82         template <typename Context, typename Iterator>
  83         struct attribute
  84         {
  85             typedef typename Iterator::base_iterator_type iterator_type;
  86             typedef iterator_range<iterator_type> type;
  87         };
  88
  89         plain_token(TokenId const& id)
  90           : id(id) {}
  91
  92         template <typename Iterator, typename Context
  93           , typename Skipper, typename Attribute>
  94         bool parse(Iterator& first, Iterator const& last
  95           , Context& /*context*/, Skipper const& skipper
  96           , Attribute& attr) const
  97         {
  98             qi::skip_over(first, last, skipper);   // always do a pre-skip
  99
 100             if (first != last) {
 101                 // simply match the token id with the id this component has
 102                 // been initialized with
 103
 104                 typedef typename
 105                     boost::detail::iterator_traits<Iterator>::value_type
 106                 token_type;
 107                 typedef typename token_type::id_type id_type;
 108
 109                 token_type const& t = *first;
 110                 if (id_type(~0) == id_type(id) || id_type(id) == t.id()) {
 111                     spirit::traits::assign_to(t, attr);
 112                     ++first;
 113                     return true;
 114                 }
 115             }
 116             return false;
 117         }
 118
 119         template <typename Context>
 120         info what(Context& /*context*/) const
 121         {
 122             return info("token",
 123                 "token(" + boost::lexical_cast<utf8_string>(id) + ")");
 124         }
 125
 126         TokenId id;
 127     };
 128
 129     ///////////////////////////////////////////////////////////////////////////
 130     template <typename TokenId>
 131     struct plain_token_range
 132       : primitive_parser<plain_token_range<TokenId> >
 133     {
 134         template <typename Context, typename Iterator>
 135         struct attribute
 136         {
 137             typedef typename Iterator::base_iterator_type iterator_type;
 138             typedef iterator_range<iterator_type> type;
 139         };
 140
 141         plain_token_range(TokenId const& idmin, TokenId const& idmax)
 142           : idmin(idmin), idmax(idmax) {}
 143
 144         template <typename Iterator, typename Context
 145           , typename Skipper, typename Attribute>
 146         bool parse(Iterator& first, Iterator const& last
 147           , Context& /*context*/, Skipper const& skipper
 148           , Attribute& attr) const
 149         {
 150             qi::skip_over(first, last, skipper);   // always do a pre-skip
 151
 152             if (first != last) {
 153                 // simply match the token id with the id this component has
 154                 // been initialized with
 155
 156                 typedef typename
 157                     boost::detail::iterator_traits<Iterator>::value_type
 158                 token_type;
 159                 typedef typename token_type::id_type id_type;
 160
 161                 token_type const& t = *first;
 162                 if (id_type(idmax) >= t.id() && id_type(idmin) <= t.id())
 163                 {
 164                     spirit::traits::assign_to(t, attr);
 165                     ++first;
 166                     return true;
 167                 }
 168             }
 169             return false;
 170         }
 171
 172         template <typename Context>
 173         info what(Context& /*context*/) const
 174         {
 175             return info("token_range"
 176               , "token(" +
 177                     boost::lexical_cast<utf8_string>(idmin) + ", " +
 178                     boost::lexical_cast<utf8_string>(idmax) + ")"
 179             );
 180             return info("token_range");
 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::token, Modifiers>
 191     {
 192         typedef plain_token<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::token, fusion::vector1<TokenId> >
 202       , Modifiers>
 203     {
 204         typedef plain_token<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::token, fusion::vector2<TokenId, TokenId> >
 215       , Modifiers>
 216     {
 217         typedef plain_token_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_token<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_token_range<Idtype>, Attr, Context, Iterator>
 238       : mpl::true_
 239     {};
 240 }}}
 241
 242 #endif