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
14namespace 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 {
23 constexpr negated_char_parser(Positive const& positive)
24 : positive(positive) {}
25
26 template <typename CharParam, typename Context>
27 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>
37 operator~(char_parser<Positive> const& cp)
38 {
39 return { cp.derived() };
40 }
41
42 template <typename Positive>
43 constexpr Positive const&
44 operator~(negated_char_parser<Positive> const& cp)
45 {
46 return cp.positive;
47 }
48}}}
49
50namespace 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

source code of boost/libs/spirit/include/boost/spirit/home/x3/char/negated_char_parser.hpp