1// class template regex -*- C++ -*-
2
3// Copyright (C) 2010-2022 Free Software Foundation, Inc.
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/**
26 * @file bits/regex_error.h
27 * @brief Error and exception objects for the std regex library.
28 *
29 * This is an internal header file, included by other library headers.
30 * Do not attempt to use it directly. @headername{regex}
31 */
32
33namespace std _GLIBCXX_VISIBILITY(default)
34{
35_GLIBCXX_BEGIN_NAMESPACE_VERSION
36
37/**
38 * @addtogroup regex
39 * @{
40 */
41
42namespace regex_constants
43{
44 /**
45 * @name 5.3 Error Types
46 */
47 ///@{
48
49 enum error_type
50 {
51 _S_error_collate, // XXX should have been a non-zero value
52 _S_error_ctype,
53 _S_error_escape,
54 _S_error_backref,
55 _S_error_brack,
56 _S_error_paren,
57 _S_error_brace,
58 _S_error_badbrace,
59 _S_error_range,
60 _S_error_space,
61 _S_error_badrepeat,
62 _S_error_complexity,
63 _S_error_stack,
64 _S_null,
65 _S_grammar
66 };
67
68 /** The expression contained an invalid collating element name. */
69 _GLIBCXX17_INLINE constexpr error_type error_collate(_S_error_collate);
70
71 /** The expression contained an invalid character class name. */
72 _GLIBCXX17_INLINE constexpr error_type error_ctype(_S_error_ctype);
73
74 /**
75 * The expression contained an invalid escaped character, or a trailing
76 * escape.
77 */
78 _GLIBCXX17_INLINE constexpr error_type error_escape(_S_error_escape);
79
80 /** The expression contained an invalid back reference. */
81 _GLIBCXX17_INLINE constexpr error_type error_backref(_S_error_backref);
82
83 /** The expression contained mismatched [ and ]. */
84 _GLIBCXX17_INLINE constexpr error_type error_brack(_S_error_brack);
85
86 /** The expression contained mismatched ( and ). */
87 _GLIBCXX17_INLINE constexpr error_type error_paren(_S_error_paren);
88
89 /** The expression contained mismatched { and } */
90 _GLIBCXX17_INLINE constexpr error_type error_brace(_S_error_brace);
91
92 /** The expression contained an invalid range in a {} expression. */
93 _GLIBCXX17_INLINE constexpr error_type error_badbrace(_S_error_badbrace);
94
95 /**
96 * The expression contained an invalid character range,
97 * such as [b-a] in most encodings.
98 */
99 _GLIBCXX17_INLINE constexpr error_type error_range(_S_error_range);
100
101 /**
102 * There was insufficient memory to convert the expression into a
103 * finite state machine.
104 */
105 _GLIBCXX17_INLINE constexpr error_type error_space(_S_error_space);
106
107 /**
108 * One of <em>*?+{</em> was not preceded by a valid regular expression.
109 */
110 _GLIBCXX17_INLINE constexpr error_type error_badrepeat(_S_error_badrepeat);
111
112 /**
113 * The complexity of an attempted match against a regular expression
114 * exceeded a pre-set level.
115 */
116 _GLIBCXX17_INLINE constexpr error_type error_complexity(_S_error_complexity);
117
118 /**
119 * There was insufficient memory to determine whether the
120 * regular expression could match the specified character sequence.
121 */
122 _GLIBCXX17_INLINE constexpr error_type error_stack(_S_error_stack);
123
124 ///@}
125} // namespace regex_constants
126
127 // [7.8] Class regex_error
128 /**
129 * @brief A regular expression exception class.
130 * @ingroup exceptions
131 *
132 * The regular expression library throws objects of this class on error.
133 */
134 class regex_error : public std::runtime_error
135 {
136 using error_type = regex_constants::error_type;
137
138 error_type _M_code;
139
140 public:
141 /**
142 * @brief Constructs a regex_error object.
143 *
144 * @param __ecode the regex error code.
145 */
146 explicit
147 regex_error(error_type __ecode);
148
149 virtual ~regex_error() throw();
150
151 /**
152 * @brief Gets the regex error code.
153 *
154 * @returns the regex error code.
155 */
156 regex_constants::error_type
157 code() const noexcept
158 { return _M_code; }
159
160 private:
161 regex_error(error_type __ecode, const char* __what)
162 : std::runtime_error(__what), _M_code(__ecode)
163 { }
164
165 [[__noreturn__]]
166 friend void
167 __throw_regex_error(error_type __ecode __attribute__((__unused__)),
168 const char* __what __attribute__((__unused__)))
169 { _GLIBCXX_THROW_OR_ABORT(regex_error(__ecode, __what)); }
170 };
171
172 /// @cond undocumented
173
174 [[__noreturn__]]
175 void
176 __throw_regex_error(regex_constants::error_type __ecode);
177
178 [[__noreturn__]]
179 inline void
180 __throw_regex_error(regex_constants::error_type __ecode, const char* __what);
181
182 /// @endcond
183
184 ///@} // group regex
185
186_GLIBCXX_END_NAMESPACE_VERSION
187} // namespace std
188