ceph/src/boost/boost/spirit/home/x3/directive/no_case.hpp

   1 /*=============================================================================
   2     Copyright (c) 2014 Thomas Bernard
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 =============================================================================*/
   7 #if !defined(SPIRIT_NO_CASE_SEPT_16_2014_0912PM)
   8 #define SPIRIT_NO_CASE_SEPT_16_2014_0912PM
   9
  10 #include <boost/spirit/home/x3/support/context.hpp>
  11 #include <boost/spirit/home/x3/support/unused.hpp>
  12 #include <boost/spirit/home/x3/support/no_case.hpp>
  13 #include <boost/spirit/home/x3/core/parser.hpp>
  14
  15 namespace boost { namespace spirit { namespace x3
  16 {
  17     // propagate no_case information through the context
  18     template <typename Subject>
  19     struct no_case_directive : unary_parser<Subject, no_case_directive<Subject>>
  20     {
  21         typedef unary_parser<Subject, no_case_directive<Subject> > base_type;
  22         static bool const is_pass_through_unary = true;
  23         static bool const handles_container = Subject::handles_container;
  24
  25         no_case_directive(Subject const& subject)
  26           : base_type(subject) {}
  27
  28         template <typename Iterator, typename Context
  29           , typename RContext, typename Attribute>
  30         bool parse(Iterator& first, Iterator const& last
  31           , Context const& context, RContext& rcontext, Attribute& attr) const
  32         {
  33             return this->subject.parse(
  34                 first, last
  35               , make_context<no_case_tag>(no_case_compare_, context)
  36               , rcontext
  37               , attr);
  38         }
  39     };
  40
  41     struct no_case_gen
  42     {
  43         template <typename Subject>
  44         no_case_directive<typename extension::as_parser<Subject>::value_type>
  45         operator[](Subject const& subject) const
  46         {
  47             return { as_parser(subject) };
  48         }
  49     };
  50
  51     auto const no_case = no_case_gen{};
  52 }}}
  53
  54 #endif