Chris@102: /*=============================================================================
Chris@102:     Copyright (c) 2001-2014 Joel de Guzman
Chris@102: 
Chris@102:     Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@102:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@102: =============================================================================*/
Chris@102: #if !defined(SPIRIT_OMIT_MARCH_24_2007_0802AM)
Chris@102: #define SPIRIT_OMIT_MARCH_24_2007_0802AM
Chris@102: 
Chris@102: #if defined(_MSC_VER)
Chris@102: #pragma once
Chris@102: #endif
Chris@102: 
Chris@102: #include <boost/spirit/home/x3/support/unused.hpp>
Chris@102: #include <boost/spirit/home/x3/core/parser.hpp>
Chris@102: 
Chris@102: namespace boost { namespace spirit { namespace x3
Chris@102: {
Chris@102:     ///////////////////////////////////////////////////////////////////////////
Chris@102:     // omit_directive forces the attribute of subject parser
Chris@102:     // to be unused_type
Chris@102:     ///////////////////////////////////////////////////////////////////////////
Chris@102:     template <typename Subject>
Chris@102:     struct omit_directive : unary_parser<Subject, omit_directive<Subject>>
Chris@102:     {
Chris@102:         typedef unary_parser<Subject, omit_directive<Subject> > base_type;
Chris@102:         typedef unused_type attribute_type;
Chris@102:         static bool const has_attribute = false;
Chris@102: 
Chris@102:         typedef Subject subject_type;
Chris@102:         omit_directive(Subject const& subject)
Chris@102:           : base_type(subject) {}
Chris@102: 
Chris@102:         template <typename Iterator, typename Context, typename RContext>
Chris@102:         bool parse(Iterator& first, Iterator const& last
Chris@102:           , Context const& context, RContext& rcontext, unused_type) const
Chris@102:         {
Chris@102:             return this->subject.parse(first, last, context, rcontext, unused);
Chris@102:         }
Chris@102:     };
Chris@102: 
Chris@102:     struct omit_gen
Chris@102:     {
Chris@102:         template <typename Subject>
Chris@102:         omit_directive<typename extension::as_parser<Subject>::value_type>
Chris@102:         operator[](Subject const& subject) const
Chris@102:         {
Chris@102:             return {as_parser(subject)};
Chris@102:         }
Chris@102:     };
Chris@102: 
Chris@102:     omit_gen const omit = omit_gen();
Chris@102: }}}
Chris@102: 
Chris@102: #endif