1 /*============================================================================= 2 Copyright (c) 2014 Thomas Bernard 3 4 Distributed under the Boost Software License, Version 1.0. (See accompanying 5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 6 =============================================================================*/ 7 #if !defined(BOOST_SPIRIT_X3_NO_CASE_SEPT_16_2014_0912PM) 8 #define BOOST_SPIRIT_X3_NO_CASE_SEPT_16_2014_0912PM 9 10 #include <boost/spirit/home/x3/support/context.hpp> 11 #include <boost/spirit/home/x3/support/unused.hpp> 12 #include <boost/spirit/home/x3/support/no_case.hpp> 13 #include <boost/spirit/home/x3/core/parser.hpp> 14 15 namespace boost { namespace spirit { namespace x3 16 { 17 // propagate no_case information through the context 18 template <typename Subject> 19 struct no_case_directive : unary_parser<Subject, no_case_directive<Subject>> 20 { 21 typedef unary_parser<Subject, no_case_directive<Subject> > base_type; 22 static bool const is_pass_through_unary = true; 23 static bool const handles_container = Subject::handles_container; 24 no_case_directiveboost::spirit::x3::no_case_directive25 constexpr no_case_directive(Subject const& subject) 26 : base_type(subject) {} 27 28 template <typename Iterator, typename Context 29 , typename RContext, typename Attribute> parseboost::spirit::x3::no_case_directive30 bool parse(Iterator& first, Iterator const& last 31 , Context const& context, RContext& rcontext, Attribute& attr) const 32 { 33 return this->subject.parse( 34 first, last 35 , make_context<no_case_tag>(no_case_compare_, context) 36 , rcontext 37 , attr); 38 } 39 }; 40 41 struct no_case_gen 42 { 43 template <typename Subject> 44 constexpr no_case_directive<typename extension::as_parser<Subject>::value_type> operator []boost::spirit::x3::no_case_gen45 operator[](Subject const& subject) const 46 { 47 return { as_parser(subject) }; 48 } 49 }; 50 51 constexpr auto no_case = no_case_gen{}; 52 }}} 53 54 #endif 55