| 1 |
// class template regex -*- C++ -*- |
| 2 |
|
| 3 |
// Copyright (C) 2013-2021 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_scanner.tcc |
| 27 |
* This is an internal header file, included by other library headers. |
| 28 |
* Do not attempt to use it directly. @headername{regex} |
| 29 |
*/ |
| 30 |
|
| 31 |
// FIXME make comments doxygen format. |
| 32 |
|
| 33 |
// N3376 specified 6 regex styles: ECMAScript, basic, extended, grep, egrep |
| 34 |
// and awk |
| 35 |
// 1) grep is basic except '\n' is treated as '|' |
| 36 |
// 2) egrep is extended except '\n' is treated as '|' |
| 37 |
// 3) awk is extended except special escaping rules, and there's no |
| 38 |
// back-reference. |
| 39 |
// |
| 40 |
// References: |
| 41 |
// |
| 42 |
// ECMAScript: ECMA-262 15.10 |
| 43 |
// |
| 44 |
// basic, extended: |
| 45 |
// http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap09.html |
| 46 |
// |
| 47 |
// awk: http://pubs.opengroup.org/onlinepubs/000095399/utilities/awk.html |
| 48 |
|
| 49 |
namespace std _GLIBCXX_VISIBILITY(default) |
| 50 |
{ |
| 51 |
_GLIBCXX_BEGIN_NAMESPACE_VERSION |
| 52 |
|
| 53 |
namespace __detail |
| 54 |
{ |
| 55 |
template<typename _CharT> |
| 56 |
_Scanner<_CharT>:: |
| 57 |
_Scanner(typename _Scanner::_IterT __begin, |
| 58 |
typename _Scanner::_IterT __end, |
| 59 |
_FlagT __flags, std::locale __loc) |
| 60 |
: _ScannerBase(__flags), |
| 61 |
_M_current(__begin), _M_end(__end), |
| 62 |
_M_ctype(std::use_facet<_CtypeT>(__loc)), |
| 63 |
_M_eat_escape(_M_is_ecma() |
| 64 |
? &_Scanner::_M_eat_escape_ecma |
| 65 |
: &_Scanner::_M_eat_escape_posix) |
| 66 |
{ _M_advance(); } |
| 67 |
|
| 68 |
template<typename _CharT> |
| 69 |
void |
| 70 |
_Scanner<_CharT>:: |
| 71 |
_M_advance() |
| 72 |
{ |
| 73 |
if (_M_current == _M_end) |
| 74 |
{ |
| 75 |
_M_token = _S_token_eof; |
| 76 |
return; |
| 77 |
} |
| 78 |
|
| 79 |
if (_M_state == _S_state_normal) |
| 80 |
_M_scan_normal(); |
| 81 |
else if (_M_state == _S_state_in_bracket) |
| 82 |
_M_scan_in_bracket(); |
| 83 |
else if (_M_state == _S_state_in_brace) |
| 84 |
_M_scan_in_brace(); |
| 85 |
else |
| 86 |
{ |
| 87 |
__glibcxx_assert(false); |
| 88 |
} |
| 89 |
} |
| 90 |
|
| 91 |
// Differences between styles: |
| 92 |
// 1) "\(", "\)", "\{" in basic. It's not escaping. |
| 93 |
// 2) "(?:", "(?=", "(?!" in ECMAScript. |
| 94 |
template<typename _CharT> |
| 95 |
void |
| 96 |
_Scanner<_CharT>:: |
| 97 |
_M_scan_normal() |
| 98 |
{ |
| 99 |
auto __c = *_M_current++; |
| 100 |
|
| 101 |
if (std::strchr(_M_spec_char, _M_ctype.narrow(__c, ' ')) == nullptr) |
| 102 |
{ |
| 103 |
_M_token = _S_token_ord_char; |
| 104 |
_M_value.assign(1, __c); |
| 105 |
return; |
| 106 |
} |
| 107 |
if (__c == '\\') |
| 108 |
{ |
| 109 |
if (_M_current == _M_end) |
| 110 |
__throw_regex_error( |
| 111 |
regex_constants::error_escape, |
| 112 |
"Unexpected end of regex when escaping."); |
| 113 |
|
| 114 |
if (!_M_is_basic() |
| 115 |
|| (*_M_current != '(' |
| 116 |
&& *_M_current != ')' |
| 117 |
&& *_M_current != '{')) |
| 118 |
{ |
| 119 |
(this->*_M_eat_escape)(); |
| 120 |
return; |
| 121 |
} |
| 122 |
__c = *_M_current++; |
| 123 |
} |
| 124 |
if (__c == '(') |
| 125 |
{ |
| 126 |
if (_M_is_ecma() && *_M_current == '?') |
| 127 |
{ |
| 128 |
if (++_M_current == _M_end) |
| 129 |
__throw_regex_error( |
| 130 |
regex_constants::error_paren, |
| 131 |
"Unexpected end of regex when in an open parenthesis."); |
| 132 |
|
| 133 |
if (*_M_current == ':') |
| 134 |
{ |
| 135 |
++_M_current; |
| 136 |
_M_token = _S_token_subexpr_no_group_begin; |
| 137 |
} |
| 138 |
else if (*_M_current == '=') |
| 139 |
{ |
| 140 |
++_M_current; |
| 141 |
_M_token = _S_token_subexpr_lookahead_begin; |
| 142 |
_M_value.assign(1, 'p'); |
| 143 |
} |
| 144 |
else if (*_M_current == '!') |
| 145 |
{ |
| 146 |
++_M_current; |
| 147 |
_M_token = _S_token_subexpr_lookahead_begin; |
| 148 |
_M_value.assign(1, 'n'); |
| 149 |
} |
| 150 |
else |
| 151 |
__throw_regex_error( |
| 152 |
regex_constants::error_paren, |
| 153 |
"Invalid special open parenthesis."); |
| 154 |
} |
| 155 |
else if (_M_flags & regex_constants::nosubs) |
| 156 |
_M_token = _S_token_subexpr_no_group_begin; |
| 157 |
else |
| 158 |
_M_token = _S_token_subexpr_begin; |
| 159 |
} |
| 160 |
else if (__c == ')') |
| 161 |
_M_token = _S_token_subexpr_end; |
| 162 |
else if (__c == '[') |
| 163 |
{ |
| 164 |
_M_state = _S_state_in_bracket; |
| 165 |
_M_at_bracket_start = true; |
| 166 |
if (_M_current != _M_end && *_M_current == '^') |
| 167 |
{ |
| 168 |
_M_token = _S_token_bracket_neg_begin; |
| 169 |
++_M_current; |
| 170 |
} |
| 171 |
else |
| 172 |
_M_token = _S_token_bracket_begin; |
| 173 |
} |
| 174 |
else if (__c == '{') |
| 175 |
{ |
| 176 |
_M_state = _S_state_in_brace; |
| 177 |
_M_token = _S_token_interval_begin; |
| 178 |
} |
| 179 |
else if (__c != ']' && __c != '}') |
| 180 |
{ |
| 181 |
auto __it = _M_token_tbl; |
| 182 |
auto __narrowc = _M_ctype.narrow(__c, '\0'); |
| 183 |
for (; __it->first != '\0'; ++__it) |
| 184 |
if (__it->first == __narrowc) |
| 185 |
{ |
| 186 |
_M_token = __it->second; |
| 187 |
return; |
| 188 |
} |
| 189 |
__glibcxx_assert(false); |
| 190 |
} |
| 191 |
else |
| 192 |
{ |
| 193 |
_M_token = _S_token_ord_char; |
| 194 |
_M_value.assign(1, __c); |
| 195 |
} |
| 196 |
} |
| 197 |
|
| 198 |
// Differences between styles: |
| 199 |
// 1) different semantics of "[]" and "[^]". |
| 200 |
// 2) Escaping in bracket expr. |
| 201 |
template<typename _CharT> |
| 202 |
void |
| 203 |
_Scanner<_CharT>:: |
| 204 |
_M_scan_in_bracket() |
| 205 |
{ |
| 206 |
if (_M_current == _M_end) |
| 207 |
__throw_regex_error( |
| 208 |
regex_constants::error_brack, |
| 209 |
"Unexpected end of regex when in bracket expression."); |
| 210 |
|
| 211 |
auto __c = *_M_current++; |
| 212 |
|
| 213 |
if (__c == '-') |
| 214 |
_M_token = _S_token_bracket_dash; |
| 215 |
else if (__c == '[') |
| 216 |
{ |
| 217 |
if (_M_current == _M_end) |
| 218 |
__throw_regex_error(regex_constants::error_brack, |
| 219 |
"Unexpected character class open bracket."); |
| 220 |
|
| 221 |
if (*_M_current == '.') |
| 222 |
{ |
| 223 |
_M_token = _S_token_collsymbol; |
| 224 |
_M_eat_class(*_M_current++); |
| 225 |
} |
| 226 |
else if (*_M_current == ':') |
| 227 |
{ |
| 228 |
_M_token = _S_token_char_class_name; |
| 229 |
_M_eat_class(*_M_current++); |
| 230 |
} |
| 231 |
else if (*_M_current == '=') |
| 232 |
{ |
| 233 |
_M_token = _S_token_equiv_class_name; |
| 234 |
_M_eat_class(*_M_current++); |
| 235 |
} |
| 236 |
else |
| 237 |
{ |
| 238 |
_M_token = _S_token_ord_char; |
| 239 |
_M_value.assign(1, __c); |
| 240 |
} |
| 241 |
} |
| 242 |
// In POSIX, when encountering "[]" or "[^]", the ']' is interpreted |
| 243 |
// literally. So "[]]" and "[^]]" are valid regexes. See the testcases |
| 244 |
// `*/empty_range.cc`. |
| 245 |
else if (__c == ']' && (_M_is_ecma() || !_M_at_bracket_start)) |
| 246 |
{ |
| 247 |
_M_token = _S_token_bracket_end; |
| 248 |
_M_state = _S_state_normal; |
| 249 |
} |
| 250 |
// ECMAScript and awk permits escaping in bracket. |
| 251 |
else if (__c == '\\' && (_M_is_ecma() || _M_is_awk())) |
| 252 |
(this->*_M_eat_escape)(); |
| 253 |
else |
| 254 |
{ |
| 255 |
_M_token = _S_token_ord_char; |
| 256 |
_M_value.assign(1, __c); |
| 257 |
} |
| 258 |
_M_at_bracket_start = false; |
| 259 |
} |
| 260 |
|
| 261 |
// Differences between styles: |
| 262 |
// 1) "\}" in basic style. |
| 263 |
template<typename _CharT> |
| 264 |
void |
| 265 |
_Scanner<_CharT>:: |
| 266 |
_M_scan_in_brace() |
| 267 |
{ |
| 268 |
if (_M_current == _M_end) |
| 269 |
__throw_regex_error( |
| 270 |
regex_constants::error_brace, |
| 271 |
"Unexpected end of regex when in brace expression."); |
| 272 |
|
| 273 |
auto __c = *_M_current++; |
| 274 |
|
| 275 |
if (_M_ctype.is(_CtypeT::digit, __c)) |
| 276 |
{ |
| 277 |
_M_token = _S_token_dup_count; |
| 278 |
_M_value.assign(1, __c); |
| 279 |
while (_M_current != _M_end |
| 280 |
&& _M_ctype.is(_CtypeT::digit, *_M_current)) |
| 281 |
_M_value += *_M_current++; |
| 282 |
} |
| 283 |
else if (__c == ',') |
| 284 |
_M_token = _S_token_comma; |
| 285 |
// basic use \}. |
| 286 |
else if (_M_is_basic()) |
| 287 |
{ |
| 288 |
if (__c == '\\' && _M_current != _M_end && *_M_current == '}') |
| 289 |
{ |
| 290 |
_M_state = _S_state_normal; |
| 291 |
_M_token = _S_token_interval_end; |
| 292 |
++_M_current; |
| 293 |
} |
| 294 |
else |
| 295 |
__throw_regex_error(regex_constants::error_badbrace, |
| 296 |
"Unexpected character in brace expression."); |
| 297 |
} |
| 298 |
else if (__c == '}') |
| 299 |
{ |
| 300 |
_M_state = _S_state_normal; |
| 301 |
_M_token = _S_token_interval_end; |
| 302 |
} |
| 303 |
else |
| 304 |
__throw_regex_error(regex_constants::error_badbrace, |
| 305 |
"Unexpected character in brace expression."); |
| 306 |
} |
| 307 |
|
| 308 |
template<typename _CharT> |
| 309 |
void |
| 310 |
_Scanner<_CharT>:: |
| 311 |
_M_eat_escape_ecma() |
| 312 |
{ |
| 313 |
if (_M_current == _M_end) |
| 314 |
__throw_regex_error(regex_constants::error_escape, |
| 315 |
"Unexpected end of regex when escaping."); |
| 316 |
|
| 317 |
auto __c = *_M_current++; |
| 318 |
auto __pos = _M_find_escape(_M_ctype.narrow(__c, '\0')); |
| 319 |
|
| 320 |
if (__pos != nullptr && (__c != 'b' || _M_state == _S_state_in_bracket)) |
| 321 |
{ |
| 322 |
_M_token = _S_token_ord_char; |
| 323 |
_M_value.assign(1, *__pos); |
| 324 |
} |
| 325 |
else if (__c == 'b') |
| 326 |
{ |
| 327 |
_M_token = _S_token_word_bound; |
| 328 |
_M_value.assign(1, 'p'); |
| 329 |
} |
| 330 |
else if (__c == 'B') |
| 331 |
{ |
| 332 |
_M_token = _S_token_word_bound; |
| 333 |
_M_value.assign(1, 'n'); |
| 334 |
} |
| 335 |
// N3376 28.13 |
| 336 |
else if (__c == 'd' |
| 337 |
|| __c == 'D' |
| 338 |
|| __c == 's' |
| 339 |
|| __c == 'S' |
| 340 |
|| __c == 'w' |
| 341 |
|| __c == 'W') |
| 342 |
{ |
| 343 |
_M_token = _S_token_quoted_class; |
| 344 |
_M_value.assign(1, __c); |
| 345 |
} |
| 346 |
else if (__c == 'c') |
| 347 |
{ |
| 348 |
if (_M_current == _M_end) |
| 349 |
__throw_regex_error( |
| 350 |
regex_constants::error_escape, |
| 351 |
"Unexpected end of regex when reading control code."); |
| 352 |
_M_token = _S_token_ord_char; |
| 353 |
_M_value.assign(1, *_M_current++); |
| 354 |
} |
| 355 |
else if (__c == 'x' || __c == 'u') |
| 356 |
{ |
| 357 |
_M_value.erase(); |
| 358 |
for (int __i = 0; __i < (__c == 'x' ? 2 : 4); __i++) |
| 359 |
{ |
| 360 |
if (_M_current == _M_end |
| 361 |
|| !_M_ctype.is(_CtypeT::xdigit, *_M_current)) |
| 362 |
__throw_regex_error( |
| 363 |
regex_constants::error_escape, |
| 364 |
"Unexpected end of regex when ascii character."); |
| 365 |
_M_value += *_M_current++; |
| 366 |
} |
| 367 |
_M_token = _S_token_hex_num; |
| 368 |
} |
| 369 |
// ECMAScript recognizes multi-digit back-references. |
| 370 |
else if (_M_ctype.is(_CtypeT::digit, __c)) |
| 371 |
{ |
| 372 |
_M_value.assign(1, __c); |
| 373 |
while (_M_current != _M_end |
| 374 |
&& _M_ctype.is(_CtypeT::digit, *_M_current)) |
| 375 |
_M_value += *_M_current++; |
| 376 |
_M_token = _S_token_backref; |
| 377 |
} |
| 378 |
else |
| 379 |
{ |
| 380 |
_M_token = _S_token_ord_char; |
| 381 |
_M_value.assign(1, __c); |
| 382 |
} |
| 383 |
} |
| 384 |
|
| 385 |
// Differences between styles: |
| 386 |
// 1) Extended doesn't support backref, but basic does. |
| 387 |
template<typename _CharT> |
| 388 |
void |
| 389 |
_Scanner<_CharT>:: |
| 390 |
_M_eat_escape_posix() |
| 391 |
{ |
| 392 |
if (_M_current == _M_end) |
| 393 |
__throw_regex_error(regex_constants::error_escape, |
| 394 |
"Unexpected end of regex when escaping."); |
| 395 |
|
| 396 |
auto __c = *_M_current; |
| 397 |
auto __pos = std::strchr(_M_spec_char, _M_ctype.narrow(__c, '\0')); |
| 398 |
|
| 399 |
if (__pos != nullptr && *__pos != '\0') |
| 400 |
{ |
| 401 |
_M_token = _S_token_ord_char; |
| 402 |
_M_value.assign(1, __c); |
| 403 |
} |
| 404 |
// We MUST judge awk before handling backrefs. There's no backref in awk. |
| 405 |
else if (_M_is_awk()) |
| 406 |
{ |
| 407 |
_M_eat_escape_awk(); |
| 408 |
return; |
| 409 |
} |
| 410 |
else if (_M_is_basic() && _M_ctype.is(_CtypeT::digit, __c) && __c != '0') |
| 411 |
{ |
| 412 |
_M_token = _S_token_backref; |
| 413 |
_M_value.assign(1, __c); |
| 414 |
} |
| 415 |
else |
| 416 |
{ |
| 417 |
#ifdef __STRICT_ANSI__ |
| 418 |
// POSIX says it is undefined to escape ordinary characters |
| 419 |
__throw_regex_error(regex_constants::error_escape, |
| 420 |
"Unexpected escape character."); |
| 421 |
#else |
| 422 |
_M_token = _S_token_ord_char; |
| 423 |
_M_value.assign(1, __c); |
| 424 |
#endif |
| 425 |
} |
| 426 |
++_M_current; |
| 427 |
} |
| 428 |
|
| 429 |
template<typename _CharT> |
| 430 |
void |
| 431 |
_Scanner<_CharT>:: |
| 432 |
_M_eat_escape_awk() |
| 433 |
{ |
| 434 |
auto __c = *_M_current++; |
| 435 |
auto __pos = _M_find_escape(_M_ctype.narrow(__c, '\0')); |
| 436 |
|
| 437 |
if (__pos != nullptr) |
| 438 |
{ |
| 439 |
_M_token = _S_token_ord_char; |
| 440 |
_M_value.assign(1, *__pos); |
| 441 |
} |
| 442 |
// \ddd for oct representation |
| 443 |
else if (_M_ctype.is(_CtypeT::digit, __c) |
| 444 |
&& __c != '8' |
| 445 |
&& __c != '9') |
| 446 |
{ |
| 447 |
_M_value.assign(1, __c); |
| 448 |
for (int __i = 0; |
| 449 |
__i < 2 |
| 450 |
&& _M_current != _M_end |
| 451 |
&& _M_ctype.is(_CtypeT::digit, *_M_current) |
| 452 |
&& *_M_current != '8' |
| 453 |
&& *_M_current != '9'; |
| 454 |
__i++) |
| 455 |
_M_value += *_M_current++; |
| 456 |
_M_token = _S_token_oct_num; |
| 457 |
return; |
| 458 |
} |
| 459 |
else |
| 460 |
__throw_regex_error(regex_constants::error_escape, |
| 461 |
"Unexpected escape character."); |
| 462 |
} |
| 463 |
|
| 464 |
// Eats a character class or throws an exception. |
| 465 |
// __ch could be ':', '.' or '=', _M_current is the char after ']' when |
| 466 |
// returning. |
| 467 |
template<typename _CharT> |
| 468 |
void |
| 469 |
_Scanner<_CharT>:: |
| 470 |
_M_eat_class(char __ch) |
| 471 |
{ |
| 472 |
for (_M_value.clear(); _M_current != _M_end && *_M_current != __ch;) |
| 473 |
_M_value += *_M_current++; |
| 474 |
if (_M_current == _M_end |
| 475 |
|| *_M_current++ != __ch |
| 476 |
|| _M_current == _M_end // skip __ch |
| 477 |
|| *_M_current++ != ']') // skip ']' |
| 478 |
{ |
| 479 |
if (__ch == ':') |
| 480 |
__throw_regex_error(regex_constants::error_ctype, |
| 481 |
"Unexpected end of character class."); |
| 482 |
else |
| 483 |
__throw_regex_error(regex_constants::error_collate, |
| 484 |
"Unexpected end of character class."); |
| 485 |
} |
| 486 |
} |
| 487 |
|
| 488 |
#ifdef _GLIBCXX_DEBUG |
| 489 |
template<typename _CharT> |
| 490 |
std::ostream& |
| 491 |
_Scanner<_CharT>:: |
| 492 |
_M_print(std::ostream& ostr) |
| 493 |
{ |
| 494 |
switch (_M_token) |
| 495 |
{ |
| 496 |
case _S_token_anychar: |
| 497 |
ostr << "any-character\n"; |
| 498 |
break; |
| 499 |
case _S_token_backref: |
| 500 |
ostr << "backref\n"; |
| 501 |
break; |
| 502 |
case _S_token_bracket_begin: |
| 503 |
ostr << "bracket-begin\n"; |
| 504 |
break; |
| 505 |
case _S_token_bracket_neg_begin: |
| 506 |
ostr << "bracket-neg-begin\n"; |
| 507 |
break; |
| 508 |
case _S_token_bracket_end: |
| 509 |
ostr << "bracket-end\n"; |
| 510 |
break; |
| 511 |
case _S_token_char_class_name: |
| 512 |
ostr << "char-class-name \"" << _M_value << "\"\n"; |
| 513 |
break; |
| 514 |
case _S_token_closure0: |
| 515 |
ostr << "closure0\n"; |
| 516 |
break; |
| 517 |
case _S_token_closure1: |
| 518 |
ostr << "closure1\n"; |
| 519 |
break; |
| 520 |
case _S_token_collsymbol: |
| 521 |
ostr << "collsymbol \"" << _M_value << "\"\n"; |
| 522 |
break; |
| 523 |
case _S_token_comma: |
| 524 |
ostr << "comma\n"; |
| 525 |
break; |
| 526 |
case _S_token_dup_count: |
| 527 |
ostr << "dup count: " << _M_value << "\n"; |
| 528 |
break; |
| 529 |
case _S_token_eof: |
| 530 |
ostr << "EOF\n"; |
| 531 |
break; |
| 532 |
case _S_token_equiv_class_name: |
| 533 |
ostr << "equiv-class-name \"" << _M_value << "\"\n"; |
| 534 |
break; |
| 535 |
case _S_token_interval_begin: |
| 536 |
ostr << "interval begin\n"; |
| 537 |
break; |
| 538 |
case _S_token_interval_end: |
| 539 |
ostr << "interval end\n"; |
| 540 |
break; |
| 541 |
case _S_token_line_begin: |
| 542 |
ostr << "line begin\n"; |
| 543 |
break; |
| 544 |
case _S_token_line_end: |
| 545 |
ostr << "line end\n"; |
| 546 |
break; |
| 547 |
case _S_token_opt: |
| 548 |
ostr << "opt\n"; |
| 549 |
break; |
| 550 |
case _S_token_or: |
| 551 |
ostr << "or\n"; |
| 552 |
break; |
| 553 |
case _S_token_ord_char: |
| 554 |
ostr << "ordinary character: \"" << _M_value << "\"\n"; |
| 555 |
break; |
| 556 |
case _S_token_subexpr_begin: |
| 557 |
ostr << "subexpr begin\n"; |
| 558 |
break; |
| 559 |
case _S_token_subexpr_no_group_begin: |
| 560 |
ostr << "no grouping subexpr begin\n"; |
| 561 |
break; |
| 562 |
case _S_token_subexpr_lookahead_begin: |
| 563 |
ostr << "lookahead subexpr begin\n"; |
| 564 |
break; |
| 565 |
case _S_token_subexpr_end: |
| 566 |
ostr << "subexpr end\n"; |
| 567 |
break; |
| 568 |
case _S_token_unknown: |
| 569 |
ostr << "-- unknown token --\n"; |
| 570 |
break; |
| 571 |
case _S_token_oct_num: |
| 572 |
ostr << "oct number " << _M_value << "\n"; |
| 573 |
break; |
| 574 |
case _S_token_hex_num: |
| 575 |
ostr << "hex number " << _M_value << "\n"; |
| 576 |
break; |
| 577 |
case _S_token_quoted_class: |
| 578 |
ostr << "quoted class " << "\\" << _M_value << "\n"; |
| 579 |
break; |
| 580 |
default: |
| 581 |
_GLIBCXX_DEBUG_ASSERT(false); |
| 582 |
} |
| 583 |
return ostr; |
| 584 |
} |
| 585 |
#endif |
| 586 |
|
| 587 |
} // namespace __detail |
| 588 |
_GLIBCXX_END_NAMESPACE_VERSION |
| 589 |
} // namespace |
