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File: not_predicate.hpp
/*============================================================================= Copyright (c) 2001-2014 Joel de Guzman Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) =============================================================================*/ #if !defined(BOOST_SPIRIT_X3_NOT_PREDICATE_MARCH_23_2007_0618PM) #define BOOST_SPIRIT_X3_NOT_PREDICATE_MARCH_23_2007_0618PM #include <boost/spirit/home/x3/core/parser.hpp> namespace boost { namespace spirit { namespace x3 { template <typename Subject> struct not_predicate : unary_parser<Subject, not_predicate<Subject>> { typedef unary_parser<Subject, not_predicate<Subject>> base_type; typedef unused_type attribute_type; static bool const has_attribute = false; constexpr not_predicate(Subject const& subject) : base_type(subject) {} template <typename Iterator, typename Context , typename RContext, typename Attribute> bool parse(Iterator& first, Iterator const& last , Context const& context, RContext& rcontext, Attribute& /*attr*/) const { Iterator i = first; return !this->subject.parse(i, last, context, rcontext, unused); } }; template <typename Subject> constexpr not_predicate<typename extension::as_parser<Subject>::value_type> operator!(Subject const& subject) { return { as_parser(subject) }; } }}} #endif