/*=============================================================================
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Copyright (c) 2011 Jamboree
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Copyright (c) 2014 Lee Clagett
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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_SEEK_APRIL_13_2014_1920PM)
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#define BOOST_SPIRIT_X3_SEEK_APRIL_13_2014_1920PM
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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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template<typename Subject>
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struct seek_directive : unary_parser<Subject, seek_directive<Subject>>
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{
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typedef unary_parser<Subject, seek_directive<Subject>> base_type;
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static bool const is_pass_through_unary = true;
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static bool const handles_container = Subject::handles_container;
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constexpr seek_directive(Subject const& subject) :
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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(
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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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Iterator current(first);
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for (/**/; current != last; ++current)
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{
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if (this->subject.parse(current, last, context, rcontext, attr))
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{
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first = current;
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return true;
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}
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}
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// Test for when subjects match on input empty. Example:
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// comment = "//" >> seek[eol | eoi]
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if (this->subject.parse(current, last, context, rcontext, attr))
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{
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first = current;
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return true;
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}
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return false;
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}
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};
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struct seek_gen
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{
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template<typename Subject>
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constexpr seek_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 seek = seek_gen{};
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}}}
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#endif
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