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
|
/*
*
* Copyright (c) 1998-2002
* John Maddock
*
* Use, modification and distribution are 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)
*
*/
/*
* LOCATION: see http://www.boost.org for most recent version.
* FILE regex_split.hpp
* VERSION see <boost/version.hpp>
* DESCRIPTION: Implements regex_split and associated functions.
* Note this is an internal header file included
* by regex.hpp, do not include on its own.
*/
#ifndef BOOST_REGEX_SPLIT_HPP
#define BOOST_REGEX_SPLIT_HPP
namespace boost{
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable: 4103)
#endif
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
#ifdef BOOST_MSVC
# pragma warning(push)
# pragma warning(disable: 4800)
#endif
namespace re_detail{
template <class charT>
const basic_regex<charT>& get_default_expression(charT)
{
static const charT expression_text[4] = { '\\', 's', '+', '\00', };
static const basic_regex<charT> e(expression_text);
return e;
}
template <class OutputIterator, class charT, class Traits1, class Alloc1>
class split_pred
{
typedef std::basic_string<charT, Traits1, Alloc1> string_type;
typedef typename string_type::const_iterator iterator_type;
iterator_type* p_last;
OutputIterator* p_out;
std::size_t* p_max;
std::size_t initial_max;
public:
split_pred(iterator_type* a, OutputIterator* b, std::size_t* c)
: p_last(a), p_out(b), p_max(c), initial_max(*c) {}
bool operator()(const match_results<iterator_type>& what);
};
template <class OutputIterator, class charT, class Traits1, class Alloc1>
bool split_pred<OutputIterator, charT, Traits1, Alloc1>::operator()
(const match_results<iterator_type>& what)
{
*p_last = what[0].second;
if(what.size() > 1)
{
// output sub-expressions only:
for(unsigned i = 1; i < what.size(); ++i)
{
*(*p_out) = what.str(i);
++(*p_out);
if(0 == --*p_max) return false;
}
return *p_max != 0;
}
else
{
// output $` only if it's not-null or not at the start of the input:
const sub_match<iterator_type>& sub = what[-1];
if((sub.first != sub.second) || (*p_max != initial_max))
{
*(*p_out) = sub.str();
++(*p_out);
return --*p_max;
}
}
//
// initial null, do nothing:
return true;
}
} // namespace re_detail
template <class OutputIterator, class charT, class Traits1, class Alloc1, class Traits2>
std::size_t regex_split(OutputIterator out,
std::basic_string<charT, Traits1, Alloc1>& s,
const basic_regex<charT, Traits2>& e,
match_flag_type flags,
std::size_t max_split)
{
typedef typename std::basic_string<charT, Traits1, Alloc1>::const_iterator ci_t;
//typedef typename match_results<ci_t>::allocator_type match_allocator;
ci_t last = s.begin();
std::size_t init_size = max_split;
re_detail::split_pred<OutputIterator, charT, Traits1, Alloc1> pred(&last, &out, &max_split);
ci_t i, j;
i = s.begin();
j = s.end();
regex_grep(pred, i, j, e, flags);
//
// if there is still input left, do a final push as long as max_split
// is not exhausted, and we're not splitting sub-expressions rather
// than whitespace:
if(max_split && (last != s.end()) && (e.mark_count() == 0))
{
*out = std::basic_string<charT, Traits1, Alloc1>((ci_t)last, (ci_t)s.end());
++out;
last = s.end();
--max_split;
}
//
// delete from the string everything that has been processed so far:
s.erase(0, last - s.begin());
//
// return the number of new records pushed:
return init_size - max_split;
}
template <class OutputIterator, class charT, class Traits1, class Alloc1, class Traits2>
inline std::size_t regex_split(OutputIterator out,
std::basic_string<charT, Traits1, Alloc1>& s,
const basic_regex<charT, Traits2>& e,
match_flag_type flags = match_default)
{
return regex_split(out, s, e, flags, UINT_MAX);
}
template <class OutputIterator, class charT, class Traits1, class Alloc1>
inline std::size_t regex_split(OutputIterator out,
std::basic_string<charT, Traits1, Alloc1>& s)
{
return regex_split(out, s, re_detail::get_default_expression(charT(0)), match_default, UINT_MAX);
}
#ifdef BOOST_MSVC
# pragma warning(pop)
#endif
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable: 4103)
#endif
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
} // namespace boost
#endif
|
Swift