1 /*============================================================================= 2 Copyright (c) 2001-2014 Joel de Guzman 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_NEGATED_CHAR_PARSER_APR_16_2006_0906AM) 8 #define BOOST_SPIRIT_X3_NEGATED_CHAR_PARSER_APR_16_2006_0906AM 9 10 #include <boost/spirit/home/x3/support/traits/attribute_of.hpp> 11 #include <boost/spirit/home/x3/support/traits/has_attribute.hpp> 12 #include <boost/spirit/home/x3/char/char_parser.hpp> 13 14 namespace boost { namespace spirit { namespace x3 15 { 16 /////////////////////////////////////////////////////////////////////////// 17 // negated_char_parser handles ~cp expressions (cp is a char_parser) 18 /////////////////////////////////////////////////////////////////////////// 19 template <typename Positive> 20 struct negated_char_parser : 21 char_parser<negated_char_parser<Positive>> 22 { negated_char_parserboost::spirit::x3::negated_char_parser23 constexpr negated_char_parser(Positive const& positive) 24 : positive(positive) {} 25 26 template <typename CharParam, typename Context> testboost::spirit::x3::negated_char_parser27 bool test(CharParam ch, Context const& context) const 28 { 29 return !positive.test(ch, context); 30 } 31 32 Positive positive; 33 }; 34 35 template <typename Positive> 36 constexpr negated_char_parser<Positive> operator ~(char_parser<Positive> const & cp)37 operator~(char_parser<Positive> const& cp) 38 { 39 return { cp.derived() }; 40 } 41 42 template <typename Positive> 43 constexpr Positive const& operator ~(negated_char_parser<Positive> const & cp)44 operator~(negated_char_parser<Positive> const& cp) 45 { 46 return cp.positive; 47 } 48 }}} 49 50 namespace boost { namespace spirit { namespace x3 { namespace traits 51 { 52 template <typename Positive, typename Context> 53 struct attribute_of<x3::negated_char_parser<Positive>, Context> 54 : attribute_of<Positive, Context> {}; 55 56 template <typename Positive, typename Context> 57 struct has_attribute<x3::negated_char_parser<Positive>, Context> 58 : has_attribute<Positive, Context> {}; 59 }}}} 60 61 #endif 62