ceph/src/boost/libs/spirit/include/boost/spirit/home/x3/operator/kleene.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2014 Joel de Guzman
   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(SPIRIT_KLEENE_JANUARY_07_2007_0818AM)
   9 #define SPIRIT_KLEENE_JANUARY_07_2007_0818AM
  10
  11 #include <boost/spirit/home/x3/core/parser.hpp>
  12 #include <boost/spirit/home/x3/support/traits/container_traits.hpp>
  13 #include <boost/spirit/home/x3/support/traits/attribute_of.hpp>
  14 #include <boost/spirit/home/x3/core/detail/parse_into_container.hpp>
  15
  16 namespace boost { namespace spirit { namespace x3
  17 {
  18     template <typename Subject>
  19     struct kleene : unary_parser<Subject, kleene<Subject>>
  20     {
  21         typedef unary_parser<Subject, kleene<Subject>> base_type;
  22         static bool const handles_container = true;
  23
  24         kleene(Subject const& subject)
  25           : base_type(subject) {}
  26
  27         template <typename Iterator, typename Context
  28           , typename RContext, typename Attribute>
  29         bool parse(Iterator& first, Iterator const& last
  30           , Context const& context, RContext& rcontext, Attribute& attr) const
  31         {
  32             while (detail::parse_into_container(
  33                 this->subject, first, last, context, rcontext, attr))
  34                 ;
  35             return true;
  36         }
  37     };
  38
  39     template <typename Subject>
  40     inline kleene<typename extension::as_parser<Subject>::value_type>
  41     operator*(Subject const& subject)
  42     {
  43         return { as_parser(subject) };
  44     }
  45 }}}
  46
  47 namespace boost { namespace spirit { namespace x3 { namespace traits
  48 {
  49     template <typename Subject, typename Context>
  50     struct attribute_of<x3::kleene<Subject>, Context>
  51         : build_container<
  52             typename attribute_of<Subject, Context>::type> {};
  53 }}}}
  54
  55 #endif