52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
/*=============================================================================
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Copyright (c) 2015 Mario Lang
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Copyright (c) 2001-2011 Hartmut Kaiser
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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_HOME_X3_EXTENSIONS_MATCHES_HPP)
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#define BOOST_SPIRIT_HOME_X3_EXTENSIONS_MATCHES_HPP
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#include <boost/spirit/home/x3/core/parser.hpp>
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#include <boost/spirit/home/x3/support/traits/move_to.hpp>
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#include <boost/spirit/home/x3/support/unused.hpp>
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namespace boost { namespace spirit { namespace x3
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{
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template <typename Subject>
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struct matches_directive : unary_parser<Subject, matches_directive<Subject>>
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{
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using base_type = unary_parser<Subject, matches_directive<Subject>>;
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static bool const has_attribute = true;
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using attribute_type = bool;
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constexpr matches_directive(Subject const& subject) : base_type(subject) {}
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template <typename Iterator, typename Context
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, typename RContext, typename Attribute>
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bool parse(Iterator& first, Iterator const& last
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, Context const& context, RContext& rcontext, Attribute& attr) const
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{
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bool const result = this->subject.parse(
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first, last, context, rcontext, unused);
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traits::move_to(result, attr);
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return true;
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}
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};
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struct matches_gen
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{
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template <typename Subject>
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constexpr matches_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 matches = matches_gen{};
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}}}
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#endif
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