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