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
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*=============================================================================
Copyright (c) 1998-2003 Joel de Guzman
http://spirit.sourceforge.net/
Use, modification and distribution is subject to 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_SKIPPER_IPP)
#define BOOST_SPIRIT_SKIPPER_IPP
///////////////////////////////////////////////////////////////////////////////
namespace boost { namespace spirit {
BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
struct space_parser;
template <typename BaseT>
struct no_skipper_iteration_policy;
namespace impl
{
template <typename ST, typename ScannerT, typename BaseT>
inline void
skipper_skip(
ST const& s,
ScannerT const& scan,
skipper_iteration_policy<BaseT> const&)
{
typedef scanner_policies<
no_skipper_iteration_policy<
BOOST_DEDUCED_TYPENAME ScannerT::iteration_policy_t>,
BOOST_DEDUCED_TYPENAME ScannerT::match_policy_t,
BOOST_DEDUCED_TYPENAME ScannerT::action_policy_t
> policies_t;
scanner<BOOST_DEDUCED_TYPENAME ScannerT::iterator_t, policies_t>
scan2(scan.first, scan.last, policies_t(scan));
typedef typename ScannerT::iterator_t iterator_t;
for (;;)
{
iterator_t save = scan.first;
if (!s.parse(scan2))
{
scan.first = save;
break;
}
}
}
template <typename ST, typename ScannerT, typename BaseT>
inline void
skipper_skip(
ST const& s,
ScannerT const& scan,
no_skipper_iteration_policy<BaseT> const&)
{
for (;;)
{
typedef typename ScannerT::iterator_t iterator_t;
iterator_t save = scan.first;
if (!s.parse(scan))
{
scan.first = save;
break;
}
}
}
template <typename ST, typename ScannerT>
inline void
skipper_skip(
ST const& s,
ScannerT const& scan,
iteration_policy const&)
{
for (;;)
{
typedef typename ScannerT::iterator_t iterator_t;
iterator_t save = scan.first;
if (!s.parse(scan))
{
scan.first = save;
break;
}
}
}
template <typename SkipT>
struct phrase_parser
{
template <typename IteratorT, typename ParserT>
static parse_info<IteratorT>
parse(
IteratorT const& first_,
IteratorT const& last,
ParserT const& p,
SkipT const& skip)
{
typedef skip_parser_iteration_policy<SkipT> iter_policy_t;
typedef scanner_policies<iter_policy_t> scanner_policies_t;
typedef scanner<IteratorT, scanner_policies_t> scanner_t;
iter_policy_t iter_policy(skip);
scanner_policies_t policies(iter_policy);
IteratorT first = first_;
scanner_t scan(first, last, policies);
match<nil_t> hit = p.parse(scan);
return parse_info<IteratorT>(
first, hit, hit && (first == last),
hit.length());
}
};
template <>
struct phrase_parser<space_parser>
{
template <typename IteratorT, typename ParserT>
static parse_info<IteratorT>
parse(
IteratorT const& first_,
IteratorT const& last,
ParserT const& p,
space_parser const&)
{
typedef skipper_iteration_policy<> iter_policy_t;
typedef scanner_policies<iter_policy_t> scanner_policies_t;
typedef scanner<IteratorT, scanner_policies_t> scanner_t;
IteratorT first = first_;
scanner_t scan(first, last);
match<nil_t> hit = p.parse(scan);
return parse_info<IteratorT>(
first, hit, hit && (first == last),
hit.length());
}
};
}
///////////////////////////////////////////////////////////////////////////
//
// Free parse functions using the skippers
//
///////////////////////////////////////////////////////////////////////////
template <typename IteratorT, typename ParserT, typename SkipT>
inline parse_info<IteratorT>
parse(
IteratorT const& first,
IteratorT const& last,
parser<ParserT> const& p,
parser<SkipT> const& skip)
{
return impl::phrase_parser<SkipT>::
parse(first, last, p.derived(), skip.derived());
}
///////////////////////////////////////////////////////////////////////////
//
// Parse function for null terminated strings using the skippers
//
///////////////////////////////////////////////////////////////////////////
template <typename CharT, typename ParserT, typename SkipT>
inline parse_info<CharT const*>
parse(
CharT const* str,
parser<ParserT> const& p,
parser<SkipT> const& skip)
{
CharT const* last = str;
while (*last)
last++;
return parse(str, last, p, skip);
}
BOOST_SPIRIT_CLASSIC_NAMESPACE_END
}} // namespace boost::spirit
#endif
|
Swift