/*=============================================================================
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Copyright (c) 2001-2014 Joel de Guzman
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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_NEGATED_CHAR_PARSER_APR_16_2006_0906AM)
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#define BOOST_SPIRIT_X3_NEGATED_CHAR_PARSER_APR_16_2006_0906AM
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#include <boost/spirit/home/x3/support/traits/attribute_of.hpp>
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#include <boost/spirit/home/x3/support/traits/has_attribute.hpp>
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#include <boost/spirit/home/x3/char/char_parser.hpp>
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namespace boost { namespace spirit { namespace x3
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{
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///////////////////////////////////////////////////////////////////////////
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// negated_char_parser handles ~cp expressions (cp is a char_parser)
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///////////////////////////////////////////////////////////////////////////
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template <typename Positive>
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struct negated_char_parser :
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char_parser<negated_char_parser<Positive>>
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{
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constexpr negated_char_parser(Positive const& positive)
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: positive(positive) {}
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template <typename CharParam, typename Context>
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bool test(CharParam ch, Context const& context) const
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{
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return !positive.test(ch, context);
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}
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Positive positive;
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};
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template <typename Positive>
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constexpr negated_char_parser<Positive>
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operator~(char_parser<Positive> const& cp)
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{
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return { cp.derived() };
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}
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template <typename Positive>
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constexpr Positive const&
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operator~(negated_char_parser<Positive> const& cp)
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{
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return cp.positive;
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}
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}}}
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namespace boost { namespace spirit { namespace x3 { namespace traits
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{
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template <typename Positive, typename Context>
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struct attribute_of<x3::negated_char_parser<Positive>, Context>
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: attribute_of<Positive, Context> {};
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template <typename Positive, typename Context>
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struct has_attribute<x3::negated_char_parser<Positive>, Context>
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: has_attribute<Positive, Context> {};
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}}}}
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#endif
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