55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
/*=============================================================================
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Copyright (c) 2014 Thomas Bernard
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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_NO_CASE_SEPT_16_2014_0912PM)
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#define BOOST_SPIRIT_X3_NO_CASE_SEPT_16_2014_0912PM
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#include <boost/spirit/home/x3/support/context.hpp>
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#include <boost/spirit/home/x3/support/unused.hpp>
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#include <boost/spirit/home/x3/support/no_case.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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// propagate no_case information through the context
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template <typename Subject>
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struct no_case_directive : unary_parser<Subject, no_case_directive<Subject>>
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{
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typedef unary_parser<Subject, no_case_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 no_case_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(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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return this->subject.parse(
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first, last
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, make_context<no_case_tag>(no_case_compare_, context)
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, rcontext
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, attr);
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}
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};
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struct no_case_gen
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{
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template <typename Subject>
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constexpr no_case_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 no_case = no_case_gen{};
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}}}
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#endif
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