libstdc++
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00001 // class template regex -*- C++ -*- 00002 00003 // Copyright (C) 2010-2017 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 3, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 /** 00026 * @file bits/regex_constants.h 00027 * @brief Constant definitions for the std regex library. 00028 * 00029 * This is an internal header file, included by other library headers. 00030 * Do not attempt to use it directly. @headername{regex} 00031 */ 00032 00033 namespace std _GLIBCXX_VISIBILITY(default) 00034 { 00035 /** 00036 * @defgroup regex Regular Expressions 00037 * 00038 * A facility for performing regular expression pattern matching. 00039 * @{ 00040 */ 00041 00042 /** 00043 * @namespace std::regex_constants 00044 * @brief ISO C++-0x entities sub namespace for regex. 00045 */ 00046 namespace regex_constants 00047 { 00048 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00049 00050 /** 00051 * @name 5.1 Regular Expression Syntax Options 00052 */ 00053 //@{ 00054 enum __syntax_option 00055 { 00056 _S_icase, 00057 _S_nosubs, 00058 _S_optimize, 00059 _S_collate, 00060 _S_ECMAScript, 00061 _S_basic, 00062 _S_extended, 00063 _S_awk, 00064 _S_grep, 00065 _S_egrep, 00066 _S_polynomial, 00067 _S_syntax_last 00068 }; 00069 00070 /** 00071 * @brief This is a bitmask type indicating how to interpret the regex. 00072 * 00073 * The @c syntax_option_type is implementation defined but it is valid to 00074 * perform bitwise operations on these values and expect the right thing to 00075 * happen. 00076 * 00077 * A valid value of type syntax_option_type shall have exactly one of the 00078 * elements @c ECMAScript, @c basic, @c extended, @c awk, @c grep, @c egrep 00079 * %set. 00080 */ 00081 enum syntax_option_type : unsigned int { }; 00082 00083 /** 00084 * Specifies that the matching of regular expressions against a character 00085 * sequence shall be performed without regard to case. 00086 */ 00087 _GLIBCXX17_INLINE constexpr syntax_option_type icase = 00088 static_cast<syntax_option_type>(1 << _S_icase); 00089 00090 /** 00091 * Specifies that when a regular expression is matched against a character 00092 * container sequence, no sub-expression matches are to be stored in the 00093 * supplied match_results structure. 00094 */ 00095 _GLIBCXX17_INLINE constexpr syntax_option_type nosubs = 00096 static_cast<syntax_option_type>(1 << _S_nosubs); 00097 00098 /** 00099 * Specifies that the regular expression engine should pay more attention to 00100 * the speed with which regular expressions are matched, and less to the 00101 * speed with which regular expression objects are constructed. Otherwise 00102 * it has no detectable effect on the program output. 00103 */ 00104 _GLIBCXX17_INLINE constexpr syntax_option_type optimize = 00105 static_cast<syntax_option_type>(1 << _S_optimize); 00106 00107 /** 00108 * Specifies that character ranges of the form [a-b] should be locale 00109 * sensitive. 00110 */ 00111 _GLIBCXX17_INLINE constexpr syntax_option_type collate = 00112 static_cast<syntax_option_type>(1 << _S_collate); 00113 00114 /** 00115 * Specifies that the grammar recognized by the regular expression engine is 00116 * that used by ECMAScript in ECMA-262 [Ecma International, ECMAScript 00117 * Language Specification, Standard Ecma-262, third edition, 1999], as 00118 * modified in section [28.13]. This grammar is similar to that defined 00119 * in the PERL scripting language but extended with elements found in the 00120 * POSIX regular expression grammar. 00121 */ 00122 _GLIBCXX17_INLINE constexpr syntax_option_type ECMAScript = 00123 static_cast<syntax_option_type>(1 << _S_ECMAScript); 00124 00125 /** 00126 * Specifies that the grammar recognized by the regular expression engine is 00127 * that used by POSIX basic regular expressions in IEEE Std 1003.1-2001, 00128 * Portable Operating System Interface (POSIX), Base Definitions and 00129 * Headers, Section 9, Regular Expressions [IEEE, Information Technology -- 00130 * Portable Operating System Interface (POSIX), IEEE Standard 1003.1-2001]. 00131 */ 00132 _GLIBCXX17_INLINE constexpr syntax_option_type basic = 00133 static_cast<syntax_option_type>(1 << _S_basic); 00134 00135 /** 00136 * Specifies that the grammar recognized by the regular expression engine is 00137 * that used by POSIX extended regular expressions in IEEE Std 1003.1-2001, 00138 * Portable Operating System Interface (POSIX), Base Definitions and 00139 * Headers, Section 9, Regular Expressions. 00140 */ 00141 _GLIBCXX17_INLINE constexpr syntax_option_type extended = 00142 static_cast<syntax_option_type>(1 << _S_extended); 00143 00144 /** 00145 * Specifies that the grammar recognized by the regular expression engine is 00146 * that used by POSIX utility awk in IEEE Std 1003.1-2001. This option is 00147 * identical to syntax_option_type extended, except that C-style escape 00148 * sequences are supported. These sequences are: 00149 * \\\\, \\a, \\b, \\f, \\n, \\r, \\t , \\v, \\&apos,, &apos,, 00150 * and \\ddd (where ddd is one, two, or three octal digits). 00151 */ 00152 _GLIBCXX17_INLINE constexpr syntax_option_type awk = 00153 static_cast<syntax_option_type>(1 << _S_awk); 00154 00155 /** 00156 * Specifies that the grammar recognized by the regular expression engine is 00157 * that used by POSIX utility grep in IEEE Std 1003.1-2001. This option is 00158 * identical to syntax_option_type basic, except that newlines are treated 00159 * as whitespace. 00160 */ 00161 _GLIBCXX17_INLINE constexpr syntax_option_type grep = 00162 static_cast<syntax_option_type>(1 << _S_grep); 00163 00164 /** 00165 * Specifies that the grammar recognized by the regular expression engine is 00166 * that used by POSIX utility grep when given the -E option in 00167 * IEEE Std 1003.1-2001. This option is identical to syntax_option_type 00168 * extended, except that newlines are treated as whitespace. 00169 */ 00170 _GLIBCXX17_INLINE constexpr syntax_option_type egrep = 00171 static_cast<syntax_option_type>(1 << _S_egrep); 00172 00173 /** 00174 * Extension: Ensure both space complexity of compiled regex and 00175 * time complexity execution are not exponential. 00176 * If specified in a regex with back-references, the exception 00177 * regex_constants::error_complexity will be thrown. 00178 */ 00179 _GLIBCXX17_INLINE constexpr syntax_option_type __polynomial = 00180 static_cast<syntax_option_type>(1 << _S_polynomial); 00181 00182 constexpr inline syntax_option_type 00183 operator&(syntax_option_type __a, syntax_option_type __b) 00184 { 00185 return (syntax_option_type)(static_cast<unsigned int>(__a) 00186 & static_cast<unsigned int>(__b)); 00187 } 00188 00189 constexpr inline syntax_option_type 00190 operator|(syntax_option_type __a, syntax_option_type __b) 00191 { 00192 return (syntax_option_type)(static_cast<unsigned int>(__a) 00193 | static_cast<unsigned int>(__b)); 00194 } 00195 00196 constexpr inline syntax_option_type 00197 operator^(syntax_option_type __a, syntax_option_type __b) 00198 { 00199 return (syntax_option_type)(static_cast<unsigned int>(__a) 00200 ^ static_cast<unsigned int>(__b)); 00201 } 00202 00203 constexpr inline syntax_option_type 00204 operator~(syntax_option_type __a) 00205 { return (syntax_option_type)(~static_cast<unsigned int>(__a)); } 00206 00207 inline syntax_option_type& 00208 operator&=(syntax_option_type& __a, syntax_option_type __b) 00209 { return __a = __a & __b; } 00210 00211 inline syntax_option_type& 00212 operator|=(syntax_option_type& __a, syntax_option_type __b) 00213 { return __a = __a | __b; } 00214 00215 inline syntax_option_type& 00216 operator^=(syntax_option_type& __a, syntax_option_type __b) 00217 { return __a = __a ^ __b; } 00218 00219 //@} 00220 00221 /** 00222 * @name 5.2 Matching Rules 00223 * 00224 * Matching a regular expression against a sequence of characters [first, 00225 * last) proceeds according to the rules of the grammar specified for the 00226 * regular expression object, modified according to the effects listed 00227 * below for any bitmask elements set. 00228 * 00229 */ 00230 //@{ 00231 00232 enum __match_flag 00233 { 00234 _S_not_bol, 00235 _S_not_eol, 00236 _S_not_bow, 00237 _S_not_eow, 00238 _S_any, 00239 _S_not_null, 00240 _S_continuous, 00241 _S_prev_avail, 00242 _S_sed, 00243 _S_no_copy, 00244 _S_first_only, 00245 _S_match_flag_last 00246 }; 00247 00248 /** 00249 * @brief This is a bitmask type indicating regex matching rules. 00250 * 00251 * The @c match_flag_type is implementation defined but it is valid to 00252 * perform bitwise operations on these values and expect the right thing to 00253 * happen. 00254 */ 00255 enum match_flag_type : unsigned int { }; 00256 00257 /** 00258 * The default matching rules. 00259 */ 00260 _GLIBCXX17_INLINE constexpr match_flag_type match_default = 00261 static_cast<match_flag_type>(0); 00262 00263 /** 00264 * The first character in the sequence [first, last) is treated as though it 00265 * is not at the beginning of a line, so the character (^) in the regular 00266 * expression shall not match [first, first). 00267 */ 00268 _GLIBCXX17_INLINE constexpr match_flag_type match_not_bol = 00269 static_cast<match_flag_type>(1 << _S_not_bol); 00270 00271 /** 00272 * The last character in the sequence [first, last) is treated as though it 00273 * is not at the end of a line, so the character ($) in the regular 00274 * expression shall not match [last, last). 00275 */ 00276 _GLIBCXX17_INLINE constexpr match_flag_type match_not_eol = 00277 static_cast<match_flag_type>(1 << _S_not_eol); 00278 00279 /** 00280 * The expression \\b is not matched against the sub-sequence 00281 * [first,first). 00282 */ 00283 _GLIBCXX17_INLINE constexpr match_flag_type match_not_bow = 00284 static_cast<match_flag_type>(1 << _S_not_bow); 00285 00286 /** 00287 * The expression \\b should not be matched against the sub-sequence 00288 * [last,last). 00289 */ 00290 _GLIBCXX17_INLINE constexpr match_flag_type match_not_eow = 00291 static_cast<match_flag_type>(1 << _S_not_eow); 00292 00293 /** 00294 * If more than one match is possible then any match is an acceptable 00295 * result. 00296 */ 00297 _GLIBCXX17_INLINE constexpr match_flag_type match_any = 00298 static_cast<match_flag_type>(1 << _S_any); 00299 00300 /** 00301 * The expression does not match an empty sequence. 00302 */ 00303 _GLIBCXX17_INLINE constexpr match_flag_type match_not_null = 00304 static_cast<match_flag_type>(1 << _S_not_null); 00305 00306 /** 00307 * The expression only matches a sub-sequence that begins at first . 00308 */ 00309 _GLIBCXX17_INLINE constexpr match_flag_type match_continuous = 00310 static_cast<match_flag_type>(1 << _S_continuous); 00311 00312 /** 00313 * --first is a valid iterator position. When this flag is set then the 00314 * flags match_not_bol and match_not_bow are ignored by the regular 00315 * expression algorithms 28.11 and iterators 28.12. 00316 */ 00317 _GLIBCXX17_INLINE constexpr match_flag_type match_prev_avail = 00318 static_cast<match_flag_type>(1 << _S_prev_avail); 00319 00320 /** 00321 * When a regular expression match is to be replaced by a new string, the 00322 * new string is constructed using the rules used by the ECMAScript replace 00323 * function in ECMA- 262 [Ecma International, ECMAScript Language 00324 * Specification, Standard Ecma-262, third edition, 1999], part 15.5.4.11 00325 * String.prototype.replace. In addition, during search and replace 00326 * operations all non-overlapping occurrences of the regular expression 00327 * are located and replaced, and sections of the input that did not match 00328 * the expression are copied unchanged to the output string. 00329 * 00330 * Format strings (from ECMA-262 [15.5.4.11]): 00331 * @li $$ The dollar-sign itself ($) 00332 * @li $& The matched substring. 00333 * @li $` The portion of @a string that precedes the matched substring. 00334 * This would be match_results::prefix(). 00335 * @li $' The portion of @a string that follows the matched substring. 00336 * This would be match_results::suffix(). 00337 * @li $n The nth capture, where n is in [1,9] and $n is not followed by a 00338 * decimal digit. If n <= match_results::size() and the nth capture 00339 * is undefined, use the empty string instead. If n > 00340 * match_results::size(), the result is implementation-defined. 00341 * @li $nn The nnth capture, where nn is a two-digit decimal number on 00342 * [01, 99]. If nn <= match_results::size() and the nth capture is 00343 * undefined, use the empty string instead. If 00344 * nn > match_results::size(), the result is implementation-defined. 00345 */ 00346 _GLIBCXX17_INLINE constexpr match_flag_type format_default = 00347 static_cast<match_flag_type>(0); 00348 00349 /** 00350 * When a regular expression match is to be replaced by a new string, the 00351 * new string is constructed using the rules used by the POSIX sed utility 00352 * in IEEE Std 1003.1- 2001 [IEEE, Information Technology -- Portable 00353 * Operating System Interface (POSIX), IEEE Standard 1003.1-2001]. 00354 */ 00355 _GLIBCXX17_INLINE constexpr match_flag_type format_sed = 00356 static_cast<match_flag_type>(1 << _S_sed); 00357 00358 /** 00359 * During a search and replace operation, sections of the character 00360 * container sequence being searched that do not match the regular 00361 * expression shall not be copied to the output string. 00362 */ 00363 _GLIBCXX17_INLINE constexpr match_flag_type format_no_copy = 00364 static_cast<match_flag_type>(1 << _S_no_copy); 00365 00366 /** 00367 * When specified during a search and replace operation, only the first 00368 * occurrence of the regular expression shall be replaced. 00369 */ 00370 _GLIBCXX17_INLINE constexpr match_flag_type format_first_only = 00371 static_cast<match_flag_type>(1 << _S_first_only); 00372 00373 constexpr inline match_flag_type 00374 operator&(match_flag_type __a, match_flag_type __b) 00375 { 00376 return (match_flag_type)(static_cast<unsigned int>(__a) 00377 & static_cast<unsigned int>(__b)); 00378 } 00379 00380 constexpr inline match_flag_type 00381 operator|(match_flag_type __a, match_flag_type __b) 00382 { 00383 return (match_flag_type)(static_cast<unsigned int>(__a) 00384 | static_cast<unsigned int>(__b)); 00385 } 00386 00387 constexpr inline match_flag_type 00388 operator^(match_flag_type __a, match_flag_type __b) 00389 { 00390 return (match_flag_type)(static_cast<unsigned int>(__a) 00391 ^ static_cast<unsigned int>(__b)); 00392 } 00393 00394 constexpr inline match_flag_type 00395 operator~(match_flag_type __a) 00396 { return (match_flag_type)(~static_cast<unsigned int>(__a)); } 00397 00398 inline match_flag_type& 00399 operator&=(match_flag_type& __a, match_flag_type __b) 00400 { return __a = __a & __b; } 00401 00402 inline match_flag_type& 00403 operator|=(match_flag_type& __a, match_flag_type __b) 00404 { return __a = __a | __b; } 00405 00406 inline match_flag_type& 00407 operator^=(match_flag_type& __a, match_flag_type __b) 00408 { return __a = __a ^ __b; } 00409 00410 //@} 00411 00412 _GLIBCXX_END_NAMESPACE_VERSION 00413 } // namespace regex_constants 00414 00415 /* @} */ // group regex 00416 } // namespace std 00417