libstdc++
stdexcept
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1 // Standard exception classes -*- C++ -*-
2 
3 // Copyright (C) 2001-2019 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 /** @file include/stdexcept
26  * This is a Standard C++ Library header.
27  */
28 
29 //
30 // ISO C++ 19.1 Exception classes
31 //
32 
33 #ifndef _GLIBCXX_STDEXCEPT
34 #define _GLIBCXX_STDEXCEPT 1
35 
36 #pragma GCC system_header
37 
38 #include <exception>
39 #include <string>
40 
41 namespace std _GLIBCXX_VISIBILITY(default)
42 {
43 _GLIBCXX_BEGIN_NAMESPACE_VERSION
44 
45 #if _GLIBCXX_USE_DUAL_ABI
46 #if _GLIBCXX_USE_CXX11_ABI
47  // Emulates an old COW string when the new std::string is in use.
48  struct __cow_string
49  {
50  union {
51  const char* _M_p;
52  char _M_bytes[sizeof(const char*)];
53  };
54 
55  __cow_string();
56  __cow_string(const std::string&);
57  __cow_string(const char*, size_t);
58  __cow_string(const __cow_string&) _GLIBCXX_NOTHROW;
59  __cow_string& operator=(const __cow_string&) _GLIBCXX_NOTHROW;
60  ~__cow_string();
61 #if __cplusplus >= 201103L
62  __cow_string(__cow_string&&) noexcept;
63  __cow_string& operator=(__cow_string&&) noexcept;
64 #endif
65  };
66 
67  typedef basic_string<char> __sso_string;
68 #else // _GLIBCXX_USE_CXX11_ABI
69  typedef basic_string<char> __cow_string;
70 
71  // Emulates a new SSO string when the old std::string is in use.
72  struct __sso_string
73  {
74  struct __str
75  {
76  const char* _M_p;
77  size_t _M_string_length;
78  char _M_local_buf[16];
79  };
80 
81  union {
82  __str _M_s;
83  char _M_bytes[sizeof(__str)];
84  };
85 
86  __sso_string() _GLIBCXX_NOTHROW;
87  __sso_string(const std::string&);
88  __sso_string(const char*, size_t);
89  __sso_string(const __sso_string&);
90  __sso_string& operator=(const __sso_string&);
91  ~__sso_string();
92 #if __cplusplus >= 201103L
93  __sso_string(__sso_string&&) noexcept;
94  __sso_string& operator=(__sso_string&&) noexcept;
95 #endif
96  };
97 #endif // _GLIBCXX_USE_CXX11_ABI
98 #else // _GLIBCXX_USE_DUAL_ABI
99  typedef basic_string<char> __sso_string;
100  typedef basic_string<char> __cow_string;
101 #endif
102 
103  /**
104  * @addtogroup exceptions
105  * @{
106  */
107 
108  /** Logic errors represent problems in the internal logic of a program;
109  * in theory, these are preventable, and even detectable before the
110  * program runs (e.g., violations of class invariants).
111  * @brief One of two subclasses of exception.
112  */
113  class logic_error : public exception
114  {
115  __cow_string _M_msg;
116 
117  public:
118  /** Takes a character string describing the error. */
119  explicit
120  logic_error(const string& __arg) _GLIBCXX_TXN_SAFE;
121 
122 #if __cplusplus >= 201103L
123  explicit
124  logic_error(const char*) _GLIBCXX_TXN_SAFE;
125 
126  logic_error(logic_error&&) noexcept;
127  logic_error& operator=(logic_error&&) noexcept;
128 #endif
129 
130 #if _GLIBCXX_USE_CXX11_ABI || _GLIBCXX_DEFINE_STDEXCEPT_COPY_OPS
131  logic_error(const logic_error&) _GLIBCXX_NOTHROW;
132  logic_error& operator=(const logic_error&) _GLIBCXX_NOTHROW;
133 #elif __cplusplus >= 201103L
134  logic_error(const logic_error&) = default;
135  logic_error& operator=(const logic_error&) = default;
136 #endif
137 
138  virtual ~logic_error() _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_NOTHROW;
139 
140  /** Returns a C-style character string describing the general cause of
141  * the current error (the same string passed to the ctor). */
142  virtual const char*
143  what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_NOTHROW;
144 
145 # ifdef _GLIBCXX_TM_TS_INTERNAL
146  friend void*
147  ::_txnal_logic_error_get_msg(void* e);
148 # endif
149  };
150 
151  /** Thrown by the library, or by you, to report domain errors (domain in
152  * the mathematical sense). */
153  class domain_error : public logic_error
154  {
155  public:
156  explicit domain_error(const string& __arg) _GLIBCXX_TXN_SAFE;
157 #if __cplusplus >= 201103L
158  explicit domain_error(const char*) _GLIBCXX_TXN_SAFE;
159  domain_error(const domain_error&) = default;
160  domain_error& operator=(const domain_error&) = default;
161  domain_error(domain_error&&) = default;
162  domain_error& operator=(domain_error&&) = default;
163 #endif
164  virtual ~domain_error() _GLIBCXX_NOTHROW;
165  };
166 
167  /** Thrown to report invalid arguments to functions. */
168  class invalid_argument : public logic_error
169  {
170  public:
171  explicit invalid_argument(const string& __arg) _GLIBCXX_TXN_SAFE;
172 #if __cplusplus >= 201103L
173  explicit invalid_argument(const char*) _GLIBCXX_TXN_SAFE;
174  invalid_argument(const invalid_argument&) = default;
175  invalid_argument& operator=(const invalid_argument&) = default;
176  invalid_argument(invalid_argument&&) = default;
177  invalid_argument& operator=(invalid_argument&&) = default;
178 #endif
179  virtual ~invalid_argument() _GLIBCXX_NOTHROW;
180  };
181 
182  /** Thrown when an object is constructed that would exceed its maximum
183  * permitted size (e.g., a basic_string instance). */
184  class length_error : public logic_error
185  {
186  public:
187  explicit length_error(const string& __arg) _GLIBCXX_TXN_SAFE;
188 #if __cplusplus >= 201103L
189  explicit length_error(const char*) _GLIBCXX_TXN_SAFE;
190  length_error(const length_error&) = default;
191  length_error& operator=(const length_error&) = default;
192  length_error(length_error&&) = default;
193  length_error& operator=(length_error&&) = default;
194 #endif
195  virtual ~length_error() _GLIBCXX_NOTHROW;
196  };
197 
198  /** This represents an argument whose value is not within the expected
199  * range (e.g., boundary checks in basic_string). */
200  class out_of_range : public logic_error
201  {
202  public:
203  explicit out_of_range(const string& __arg) _GLIBCXX_TXN_SAFE;
204 #if __cplusplus >= 201103L
205  explicit out_of_range(const char*) _GLIBCXX_TXN_SAFE;
206  out_of_range(const out_of_range&) = default;
207  out_of_range& operator=(const out_of_range&) = default;
208  out_of_range(out_of_range&&) = default;
209  out_of_range& operator=(out_of_range&&) = default;
210 #endif
211  virtual ~out_of_range() _GLIBCXX_NOTHROW;
212  };
213 
214  /** Runtime errors represent problems outside the scope of a program;
215  * they cannot be easily predicted and can generally only be caught as
216  * the program executes.
217  * @brief One of two subclasses of exception.
218  */
219  class runtime_error : public exception
220  {
221  __cow_string _M_msg;
222 
223  public:
224  /** Takes a character string describing the error. */
225  explicit
226  runtime_error(const string& __arg) _GLIBCXX_TXN_SAFE;
227 
228 #if __cplusplus >= 201103L
229  explicit
230  runtime_error(const char*) _GLIBCXX_TXN_SAFE;
231 
232  runtime_error(runtime_error&&) noexcept;
233  runtime_error& operator=(runtime_error&&) noexcept;
234 #endif
235 
236 #if _GLIBCXX_USE_CXX11_ABI || _GLIBCXX_DEFINE_STDEXCEPT_COPY_OPS
237  runtime_error(const runtime_error&) _GLIBCXX_NOTHROW;
238  runtime_error& operator=(const runtime_error&) _GLIBCXX_NOTHROW;
239 #elif __cplusplus >= 201103L
240  runtime_error(const runtime_error&) = default;
241  runtime_error& operator=(const runtime_error&) = default;
242 #endif
243 
244  virtual ~runtime_error() _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_NOTHROW;
245 
246  /** Returns a C-style character string describing the general cause of
247  * the current error (the same string passed to the ctor). */
248  virtual const char*
249  what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_NOTHROW;
250 
251 # ifdef _GLIBCXX_TM_TS_INTERNAL
252  friend void*
253  ::_txnal_runtime_error_get_msg(void* e);
254 # endif
255  };
256 
257  /** Thrown to indicate range errors in internal computations. */
258  class range_error : public runtime_error
259  {
260  public:
261  explicit range_error(const string& __arg) _GLIBCXX_TXN_SAFE;
262 #if __cplusplus >= 201103L
263  explicit range_error(const char*) _GLIBCXX_TXN_SAFE;
264  range_error(const range_error&) = default;
265  range_error& operator=(const range_error&) = default;
266  range_error(range_error&&) = default;
267  range_error& operator=(range_error&&) = default;
268 #endif
269  virtual ~range_error() _GLIBCXX_NOTHROW;
270  };
271 
272  /** Thrown to indicate arithmetic overflow. */
273  class overflow_error : public runtime_error
274  {
275  public:
276  explicit overflow_error(const string& __arg) _GLIBCXX_TXN_SAFE;
277 #if __cplusplus >= 201103L
278  explicit overflow_error(const char*) _GLIBCXX_TXN_SAFE;
279  overflow_error(const overflow_error&) = default;
280  overflow_error& operator=(const overflow_error&) = default;
281  overflow_error(overflow_error&&) = default;
282  overflow_error& operator=(overflow_error&&) = default;
283 #endif
284  virtual ~overflow_error() _GLIBCXX_NOTHROW;
285  };
286 
287  /** Thrown to indicate arithmetic underflow. */
288  class underflow_error : public runtime_error
289  {
290  public:
291  explicit underflow_error(const string& __arg) _GLIBCXX_TXN_SAFE;
292 #if __cplusplus >= 201103L
293  explicit underflow_error(const char*) _GLIBCXX_TXN_SAFE;
294  underflow_error(const underflow_error&) = default;
295  underflow_error& operator=(const underflow_error&) = default;
296  underflow_error(underflow_error&&) = default;
297  underflow_error& operator=(underflow_error&&) = default;
298 #endif
299  virtual ~underflow_error() _GLIBCXX_NOTHROW;
300  };
301 
302  // @} group exceptions
303 
304 _GLIBCXX_END_NAMESPACE_VERSION
305 } // namespace
306 
307 #endif /* _GLIBCXX_STDEXCEPT */