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

   1 /*=============================================================================
   2     Copyright (c) 2015 Mario Lang
   3     Copyright (c) 2001-2011 Hartmut Kaiser
   4
   5     Distributed under the Boost Software License, Version 1.0. (See accompanying
   6     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7 =============================================================================*/
   8 #if !defined(BOOST_SPIRIT_HOME_X3_EXTENSIONS_MATCHES_HPP)
   9 #define BOOST_SPIRIT_HOME_X3_EXTENSIONS_MATCHES_HPP
  10
  11 #include <boost/spirit/home/x3/core/parser.hpp>
  12 #include <boost/spirit/home/x3/support/traits/move_to.hpp>
  13 #include <boost/spirit/home/x3/support/unused.hpp>
  14
  15 namespace boost { namespace spirit { namespace x3
  16 {
  17     template <typename Subject>
  18     struct matches_directive : unary_parser<Subject, matches_directive<Subject>>
  19     {
  20         using base_type = unary_parser<Subject, matches_directive<Subject>>;
  21         static bool const has_attribute = true;
  22         using attribute_type = bool;
  23
  24         matches_directive(Subject const& subject) : base_type(subject) {}
  25
  26         template <typename Iterator, typename Context
  27           , typename RContext, typename Attribute>
  28         bool parse(Iterator& first, Iterator const& last
  29           , Context const& context, RContext& rcontext, Attribute& attr) const
  30         {
  31             bool const result = this->subject.parse(
  32                     first, last, context, rcontext, unused);
  33             traits::move_to(result, attr);
  34             return true;
  35         }
  36     };
  37
  38     struct matches_gen
  39     {
  40         template <typename Subject>
  41         matches_directive<typename extension::as_parser<Subject>::value_type>
  42         operator[](Subject const& subject) const
  43         {
  44             return { as_parser(subject) };
  45         }
  46     };
  47
  48     auto const matches = matches_gen{};
  49 }}}
  50
  51 #endif