/*=============================================================================
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Copyright (c) 2001-2014 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#if !defined(BOOST_SPIRIT_X3_OMIT_MARCH_24_2007_0802AM)
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#define BOOST_SPIRIT_X3_OMIT_MARCH_24_2007_0802AM
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#include <boost/spirit/home/x3/support/unused.hpp>
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#include <boost/spirit/home/x3/core/parser.hpp>
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namespace boost { namespace spirit { namespace x3
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{
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///////////////////////////////////////////////////////////////////////////
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// omit_directive forces the attribute of subject parser
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// to be unused_type
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///////////////////////////////////////////////////////////////////////////
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template <typename Subject>
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struct omit_directive : unary_parser<Subject, omit_directive<Subject>>
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{
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typedef unary_parser<Subject, omit_directive<Subject> > base_type;
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typedef unused_type attribute_type;
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static bool const has_attribute = false;
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typedef Subject subject_type;
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constexpr omit_directive(Subject const& subject)
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: base_type(subject) {}
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template <typename Iterator, typename Context, typename RContext>
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bool parse(Iterator& first, Iterator const& last
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, Context const& context, RContext& rcontext, unused_type) const
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{
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return this->subject.parse(first, last, context, rcontext, unused);
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}
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};
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struct omit_gen
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{
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template <typename Subject>
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constexpr omit_directive<typename extension::as_parser<Subject>::value_type>
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operator[](Subject const& subject) const
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{
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return { as_parser(subject) };
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}
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};
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constexpr auto omit = omit_gen{};
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}}}
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#endif
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