| /*============================================================================= |
| 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>> |
| { |
| constexpr 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> |
| constexpr negated_char_parser<Positive> |
| operator~(char_parser<Positive> const& cp) |
| { |
| return { cp.derived() }; |
| } |
| |
| template <typename Positive> |
| constexpr 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 |