blob: 2ad3f709c6708dd65e79582673a7ce0aeba10bf0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/*=============================================================================
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_SUPPORT_NO_CASE_SEPT_24_2014_1125PM)
#define BOOST_SPIRIT_X3_SUPPORT_NO_CASE_SEPT_24_2014_1125PM
#include <boost/spirit/home/x3/support/unused.hpp>
#include <boost/spirit/home/x3/support/context.hpp>
#include <boost/spirit/home/x3/char/char_class_tags.hpp>
namespace boost { namespace spirit { namespace x3
{
struct no_case_tag {};
template <typename Encoding>
struct case_compare
{
template < template <typename> class basic_charset>
typename Encoding::char_type
in_set( typename Encoding::char_type const ch
, basic_charset<typename Encoding::char_type> const &set)
{
return set.test(ch);
}
int32_t operator()(
typename Encoding::char_type const lc
, typename Encoding::char_type const rc) const
{
return lc - rc;
}
template <typename CharClassTag>
CharClassTag get_char_class_tag(CharClassTag tag) const
{
return tag;
}
};
template <typename Encoding>
struct no_case_compare
{
template < template <typename> class basic_charset>
typename Encoding::char_type
in_set( typename Encoding::char_type const ch
, basic_charset<typename Encoding::char_type> const &set)
{
return set.test(ch)
|| set.test(Encoding::islower(ch) ? Encoding::toupper(ch) : Encoding::tolower(ch));
}
int32_t operator()(
typename Encoding::char_type const lc
, typename Encoding::char_type const rc) const
{
return Encoding::islower(rc) ? Encoding::tolower(lc) - rc : Encoding::toupper(lc) - rc;
}
template <typename CharClassTag>
CharClassTag get_char_class_tag(CharClassTag tag) const
{
return tag;
}
alpha_tag get_char_class_tag(lower_tag ) const
{
return {};
}
alpha_tag get_char_class_tag(upper_tag ) const
{
return {};
}
};
template <typename Encoding>
case_compare<Encoding> get_case_compare_impl(unused_type const&)
{
return {};
}
template <typename Encoding>
no_case_compare<Encoding> get_case_compare_impl(no_case_tag const&)
{
return {};
}
template <typename Encoding, typename Context>
inline decltype(auto) get_case_compare(Context const& context)
{
return get_case_compare_impl<Encoding>(x3::get<no_case_tag>(context));
}
auto const no_case_compare_ = no_case_tag{};
}}}
#endif
|
