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 #include <iterator> // for std::iterator_traits
  31
  32 namespace boost { namespace spirit
  33 {
  34     ///////////////////////////////////////////////////////////////////////////
  35     // Enablers
  36     ///////////////////////////////////////////////////////////////////////////
  37
  38     // enables token
  39     template <>
  40     struct use_terminal<qi::domain, tag::token>
  41       : mpl::true_ {};
  42
  43     // enables token(id)
  44     template <typename A0>
  45     struct use_terminal<qi::domain
  46       , terminal_ex<tag::token, fusion::vector1<A0> >
  47     > : mpl::or_<is_integral<A0>, is_enum<A0> > {};
  48
  49     // enables token(idmin, idmax)
  50     template <typename A0, typename A1>
  51     struct use_terminal<qi::domain
  52       , terminal_ex<tag::token, fusion::vector2<A0, A1> >
  53     > : mpl::and_<
  54             mpl::or_<is_integral<A0>, is_enum<A0> >
  55           , mpl::or_<is_integral<A1>, is_enum<A1> >
  56         > {};
  57
  58     // enables *lazy* token(id)
  59     template <>
  60     struct use_lazy_terminal<
  61         qi::domain, tag::token, 1
  62     > : mpl::true_ {};
  63
  64     // enables *lazy* token(idmin, idmax)
  65     template <>
  66     struct use_lazy_terminal<
  67         qi::domain, tag::token, 2
  68     > : mpl::true_ {};
  69 }}
  70
  71 namespace boost { namespace spirit { namespace qi
  72 {
  73 #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
  74     using spirit::token;
  75 #endif
  76     using spirit::token_type;
  77
  78     ///////////////////////////////////////////////////////////////////////////
  79     template <typename TokenId>
  80     struct plain_token
  81       : primitive_parser<plain_token<TokenId> >
  82     {
  83         template <typename Context, typename Iterator>
  84         struct attribute
  85         {
  86             typedef typename Iterator::base_iterator_type iterator_type;
  87             typedef iterator_range<iterator_type> type;
  88         };
  89
  90         plain_token(TokenId const& id)
  91           : id(id) {}
  92
  93         template <typename Iterator, typename Context
  94           , typename Skipper, typename Attribute>
  95         bool parse(Iterator& first, Iterator const& last
  96           , Context& /*context*/, Skipper const& skipper
  97           , Attribute& attr) const
  98         {
  99             qi::skip_over(first, last, skipper);   // always do a pre-skip
 100
 101             if (first != last) {
 102                 // simply match the token id with the id this component has
 103                 // been initialized with
 104
 105                 typedef typename
 106                     std::iterator_traits<Iterator>::value_type
 107                 token_type;
 108                 typedef typename token_type::id_type id_type;
 109
 110                 token_type const& t = *first;
 111                 if (id_type(~0) == id_type(id) || id_type(id) == t.id()) {
 112                     spirit::traits::assign_to(t, attr);
 113                     ++first;
 114                     return true;
 115                 }
 116             }
 117             return false;
 118         }
 119
 120         template <typename Context>
 121         info what(Context& /*context*/) const
 122         {
 123             return info("token",
 124                 "token(" + boost::lexical_cast<utf8_string>(id) + ")");
 125         }
 126
 127         TokenId id;
 128     };
 129
 130     ///////////////////////////////////////////////////////////////////////////
 131     template <typename TokenId>
 132     struct plain_token_range
 133       : primitive_parser<plain_token_range<TokenId> >
 134     {
 135         template <typename Context, typename Iterator>
 136         struct attribute
 137         {
 138             typedef typename Iterator::base_iterator_type iterator_type;
 139             typedef iterator_range<iterator_type> type;
 140         };
 141
 142         plain_token_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                     std::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(idmax) >= t.id() && id_type(idmin) <= t.id())
 164                 {
 165                     spirit::traits::assign_to(t, 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("token_range"
 177               , "token(" +
 178                     boost::lexical_cast<utf8_string>(idmin) + ", " +
 179                     boost::lexical_cast<utf8_string>(idmax) + ")"
 180             );
 181             return info("token_range");
 182         }
 183
 184         TokenId idmin, idmax;
 185     };
 186
 187     ///////////////////////////////////////////////////////////////////////////
 188     // Parser generators: make_xxx function (objects)
 189     ///////////////////////////////////////////////////////////////////////////
 190     template <typename Modifiers>
 191     struct make_primitive<tag::token, Modifiers>
 192     {
 193         typedef plain_token<std::size_t> result_type;
 194
 195         result_type operator()(unused_type, unused_type) const
 196         {
 197             return result_type(std::size_t(~0));
 198         }
 199     };
 200
 201     template <typename Modifiers, typename TokenId>
 202     struct make_primitive<terminal_ex<tag::token, fusion::vector1<TokenId> >
 203       , Modifiers>
 204     {
 205         typedef plain_token<TokenId> result_type;
 206
 207         template <typename Terminal>
 208         result_type operator()(Terminal const& term, unused_type) const
 209         {
 210             return result_type(fusion::at_c<0>(term.args));
 211         }
 212     };
 213
 214     template <typename Modifiers, typename TokenId>
 215     struct make_primitive<terminal_ex<tag::token, fusion::vector2<TokenId, TokenId> >
 216       , Modifiers>
 217     {
 218         typedef plain_token_range<TokenId> result_type;
 219
 220         template <typename Terminal>
 221         result_type operator()(Terminal const& term, unused_type) const
 222         {
 223             return result_type(fusion::at_c<0>(term.args)
 224               , fusion::at_c<1>(term.args));
 225         }
 226     };
 227 }}}
 228
 229 namespace boost { namespace spirit { namespace traits
 230 {
 231     ///////////////////////////////////////////////////////////////////////////
 232     template<typename Idtype, typename Attr, typename Context, typename Iterator>
 233     struct handles_container<qi::plain_token<Idtype>, Attr, Context, Iterator>
 234       : mpl::true_
 235     {};
 236
 237     template<typename Idtype, typename Attr, typename Context, typename Iterator>
 238     struct handles_container<qi::plain_token_range<Idtype>, Attr, Context, Iterator>
 239       : mpl::true_
 240     {};
 241 }}}
 242
 243 #endif