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1 | // class template regex -*- C++ -*- |
2 | ||
bf6319b9 | 3 | // Copyright (C) 2010, 2011 Free Software Foundation, Inc. |
849cab7b SW |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
9 | // any later version. | |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // Under Section 7 of GPL version 3, you are granted additional | |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | // You should have received a copy of the GNU General Public License and | |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
24 | ||
25 | /** | |
f910786b BK |
26 | * @file bits/regex_cursor.h |
27 | * This is an internal header file, included by other library headers. | |
28 | * Do not attempt to use it directly. @headername{regex} | |
849cab7b SW |
29 | */ |
30 | ||
12ffa228 BK |
31 | namespace std _GLIBCXX_VISIBILITY(default) |
32 | { | |
849cab7b SW |
33 | namespace __regex |
34 | { | |
e9599233 BK |
35 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
36 | ||
849cab7b SW |
37 | // ABC for pattern matching |
38 | struct _PatternCursor | |
39 | { | |
40 | virtual ~_PatternCursor() { }; | |
41 | virtual void _M_next() = 0; | |
42 | virtual bool _M_at_end() const = 0; | |
43 | }; | |
44 | ||
45 | // Provides a cursor into the specific target string. | |
46 | template<typename _FwdIterT> | |
47 | class _SpecializedCursor | |
48 | : public _PatternCursor | |
49 | { | |
50 | public: | |
51 | _SpecializedCursor(const _FwdIterT& __b, const _FwdIterT __e) | |
52 | : _M_b(__b), _M_c(__b), _M_e(__e) | |
53 | { } | |
54 | ||
55 | typename std::iterator_traits<_FwdIterT>::value_type | |
56 | _M_current() const | |
57 | { return *_M_c; } | |
58 | ||
59 | void | |
60 | _M_next() | |
61 | { ++_M_c; } | |
62 | ||
63 | _FwdIterT | |
64 | _M_pos() const | |
65 | { return _M_c; } | |
66 | ||
67 | const _FwdIterT& | |
68 | _M_begin() const | |
d860c842 | 69 | { return _M_b; } |
849cab7b SW |
70 | |
71 | const _FwdIterT& | |
72 | _M_end() const | |
d860c842 | 73 | { return _M_e; } |
849cab7b SW |
74 | |
75 | bool | |
76 | _M_at_end() const | |
77 | { return _M_c == _M_e; } | |
78 | ||
79 | private: | |
80 | _FwdIterT _M_b; | |
81 | _FwdIterT _M_c; | |
82 | _FwdIterT _M_e; | |
83 | }; | |
84 | ||
bf6319b9 | 85 | // Helper function to create a cursor specialized for an iterator class. |
849cab7b | 86 | template<typename _FwdIterT> |
d860c842 PC |
87 | inline _SpecializedCursor<_FwdIterT> |
88 | __cursor(const _FwdIterT& __b, const _FwdIterT __e) | |
89 | { return _SpecializedCursor<_FwdIterT>(__b, __e); } | |
849cab7b | 90 | |
12ffa228 | 91 | _GLIBCXX_END_NAMESPACE_VERSION |
e9599233 | 92 | } // namespace __regex |
12ffa228 | 93 | } // namespace |