1 // Errors for std::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
_GLIBCXX_VISIBILITY(default)33 namespace std _GLIBCXX_VISIBILITY(default)
34 {
35 _GLIBCXX_BEGIN_NAMESPACE_VERSION
36
37 /**
38 * @addtogroup regex
39 * @{
40 */
41
42 namespace 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 * @headerfile regex
135 * @since C++11
136 */
137 class regex_error : public std::runtime_error
138 {
139 using error_type = regex_constants::error_type;
140
141 error_type _M_code;
142
143 public:
144 /**
145 * @brief Constructs a regex_error object.
146 *
147 * @param __ecode the regex error code.
148 */
149 explicit
150 regex_error(error_type __ecode);
151
152 virtual ~regex_error() throw();
153
154 /**
155 * @brief Gets the regex error code.
156 *
157 * @returns the regex error code.
158 */
159 regex_constants::error_type
160 code() const noexcept
161 { return _M_code; }
162
163 private:
164 /// @cond undocumented
165 regex_error(error_type __ecode, const char* __what)
166 : std::runtime_error(__what), _M_code(__ecode)
167 { }
168
169 [[__noreturn__]]
170 friend void
171 __throw_regex_error(error_type __ecode __attribute__((__unused__)),
172 const char* __what __attribute__((__unused__)))
173 { _GLIBCXX_THROW_OR_ABORT(regex_error(__ecode, __what)); }
174 /// @endcond
175 };
176
177 /// @cond undocumented
178
179 [[__noreturn__]]
180 void
181 __throw_regex_error(regex_constants::error_type __ecode);
182
183 [[__noreturn__]]
184 inline void
185 __throw_regex_error(regex_constants::error_type __ecode, const char* __what);
186
187 /// @endcond
188
189 ///@} // group regex
190
191 _GLIBCXX_END_NAMESPACE_VERSION
192 } // namespace std
193