libstdc++
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00001 // class template regex -*- C++ -*- 00002 00003 // Copyright (C) 2010-2014 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_syntax_last 00067 }; 00068 00069 /** 00070 * @brief This is a bitmask type indicating how to interpret the regex. 00071 * 00072 * The @c syntax_option_type is implementation defined but it is valid to 00073 * perform bitwise operations on these values and expect the right thing to 00074 * happen. 00075 * 00076 * A valid value of type syntax_option_type shall have exactly one of the 00077 * elements @c ECMAScript, @c basic, @c extended, @c awk, @c grep, @c egrep 00078 * %set. 00079 */ 00080 enum syntax_option_type : unsigned int 00081 { 00082 /** 00083 * Specifies that the matching of regular expressions against a character 00084 * sequence shall be performed without regard to case. 00085 */ 00086 icase = 1 << _S_icase, 00087 00088 /** 00089 * Specifies that when a regular expression is matched against a character 00090 * container sequence, no sub-expression matches are to be stored in the 00091 * supplied match_results structure. 00092 */ 00093 nosubs = 1 << _S_nosubs, 00094 00095 /** 00096 * Specifies that the regular expression engine should pay more attention to 00097 * the speed with which regular expressions are matched, and less to the 00098 * speed with which regular expression objects are constructed. Otherwise 00099 * it has no detectable effect on the program output. 00100 */ 00101 optimize = 1 << _S_optimize, 00102 00103 /** 00104 * Specifies that character ranges of the form [a-b] should be locale 00105 * sensitive. 00106 */ 00107 collate = 1 << _S_collate, 00108 00109 /** 00110 * Specifies that the grammar recognized by the regular expression engine is 00111 * that used by ECMAScript in ECMA-262 [Ecma International, ECMAScript 00112 * Language Specification, Standard Ecma-262, third edition, 1999], as 00113 * modified in section [28.13]. This grammar is similar to that defined 00114 * in the PERL scripting language but extended with elements found in the 00115 * POSIX regular expression grammar. 00116 */ 00117 ECMAScript = 1 << _S_ECMAScript, 00118 00119 /** 00120 * Specifies that the grammar recognized by the regular expression engine is 00121 * that used by POSIX basic regular expressions in IEEE Std 1003.1-2001, 00122 * Portable Operating System Interface (POSIX), Base Definitions and 00123 * Headers, Section 9, Regular Expressions [IEEE, Information Technology -- 00124 * Portable Operating System Interface (POSIX), IEEE Standard 1003.1-2001]. 00125 */ 00126 basic = 1 << _S_basic, 00127 00128 /** 00129 * Specifies that the grammar recognized by the regular expression engine is 00130 * that used by POSIX extended regular expressions in IEEE Std 1003.1-2001, 00131 * Portable Operating System Interface (POSIX), Base Definitions and 00132 * Headers, Section 9, Regular Expressions. 00133 */ 00134 extended = 1 << _S_extended, 00135 00136 /** 00137 * Specifies that the grammar recognized by the regular expression engine is 00138 * that used by POSIX utility awk in IEEE Std 1003.1-2001. This option is 00139 * identical to syntax_option_type extended, except that C-style escape 00140 * sequences are supported. These sequences are: 00141 * \\\\, \\a, \\b, \\f, \\n, \\r, \\t , \\v, \\&apos,, &apos,, 00142 * and \\ddd (where ddd is one, two, or three octal digits). 00143 */ 00144 awk = 1 << _S_awk, 00145 00146 /** 00147 * Specifies that the grammar recognized by the regular expression engine is 00148 * that used by POSIX utility grep in IEEE Std 1003.1-2001. This option is 00149 * identical to syntax_option_type basic, except that newlines are treated 00150 * as whitespace. 00151 */ 00152 grep = 1 << _S_grep, 00153 00154 /** 00155 * Specifies that the grammar recognized by the regular expression engine is 00156 * that used by POSIX utility grep when given the -E option in 00157 * IEEE Std 1003.1-2001. This option is identical to syntax_option_type 00158 * extended, except that newlines are treated as whitespace. 00159 */ 00160 egrep = 1 << _S_egrep, 00161 }; 00162 00163 constexpr inline syntax_option_type 00164 operator&(syntax_option_type __a, syntax_option_type __b) 00165 { 00166 return (syntax_option_type)(static_cast<unsigned int>(__a) 00167 & static_cast<unsigned int>(__b)); 00168 } 00169 00170 constexpr inline syntax_option_type 00171 operator|(syntax_option_type __a, syntax_option_type __b) 00172 { 00173 return (syntax_option_type)(static_cast<unsigned int>(__a) 00174 | static_cast<unsigned int>(__b)); 00175 } 00176 00177 constexpr inline syntax_option_type 00178 operator^(syntax_option_type __a, syntax_option_type __b) 00179 { 00180 return (syntax_option_type)(static_cast<unsigned int>(__a) 00181 ^ static_cast<unsigned int>(__b)); 00182 } 00183 00184 constexpr inline syntax_option_type 00185 operator~(syntax_option_type __a) 00186 { return (syntax_option_type)(~static_cast<unsigned int>(__a)); } 00187 00188 inline syntax_option_type& 00189 operator&=(syntax_option_type& __a, syntax_option_type __b) 00190 { return __a = __a & __b; } 00191 00192 inline syntax_option_type& 00193 operator|=(syntax_option_type& __a, syntax_option_type __b) 00194 { return __a = __a | __b; } 00195 00196 inline syntax_option_type& 00197 operator^=(syntax_option_type& __a, syntax_option_type __b) 00198 { return __a = __a ^ __b; } 00199 00200 //@} 00201 00202 /** 00203 * @name 5.2 Matching Rules 00204 * 00205 * Matching a regular expression against a sequence of characters [first, 00206 * last) proceeds according to the rules of the grammar specified for the 00207 * regular expression object, modified according to the effects listed 00208 * below for any bitmask elements set. 00209 * 00210 */ 00211 //@{ 00212 00213 enum __match_flag 00214 { 00215 _S_not_bol, 00216 _S_not_eol, 00217 _S_not_bow, 00218 _S_not_eow, 00219 _S_any, 00220 _S_not_null, 00221 _S_continuous, 00222 _S_prev_avail, 00223 _S_sed, 00224 _S_no_copy, 00225 _S_first_only, 00226 _S_match_flag_last 00227 }; 00228 00229 /** 00230 * @brief This is a bitmask type indicating regex matching rules. 00231 * 00232 * The @c match_flag_type is implementation defined but it is valid to 00233 * perform bitwise operations on these values and expect the right thing to 00234 * happen. 00235 */ 00236 enum match_flag_type : unsigned int 00237 { 00238 /** 00239 * The default matching rules. 00240 */ 00241 match_default = 0, 00242 00243 /** 00244 * The first character in the sequence [first, last) is treated as though it 00245 * is not at the beginning of a line, so the character (^) in the regular 00246 * expression shall not match [first, first). 00247 */ 00248 match_not_bol = 1 << _S_not_bol, 00249 00250 /** 00251 * The last character in the sequence [first, last) is treated as though it 00252 * is not at the end of a line, so the character ($) in the regular 00253 * expression shall not match [last, last). 00254 */ 00255 match_not_eol = 1 << _S_not_eol, 00256 00257 /** 00258 * The expression \\b is not matched against the sub-sequence 00259 * [first,first). 00260 */ 00261 match_not_bow = 1 << _S_not_bow, 00262 00263 /** 00264 * The expression \\b should not be matched against the sub-sequence 00265 * [last,last). 00266 */ 00267 match_not_eow = 1 << _S_not_eow, 00268 00269 /** 00270 * If more than one match is possible then any match is an acceptable 00271 * result. 00272 */ 00273 match_any = 1 << _S_any, 00274 00275 /** 00276 * The expression does not match an empty sequence. 00277 */ 00278 match_not_null = 1 << _S_not_null, 00279 00280 /** 00281 * The expression only matches a sub-sequence that begins at first . 00282 */ 00283 match_continuous = 1 << _S_continuous, 00284 00285 /** 00286 * --first is a valid iterator position. When this flag is set then the 00287 * flags match_not_bol and match_not_bow are ignored by the regular 00288 * expression algorithms 28.11 and iterators 28.12. 00289 */ 00290 match_prev_avail = 1 << _S_prev_avail, 00291 00292 /** 00293 * When a regular expression match is to be replaced by a new string, the 00294 * new string is constructed using the rules used by the ECMAScript replace 00295 * function in ECMA- 262 [Ecma International, ECMAScript Language 00296 * Specification, Standard Ecma-262, third edition, 1999], part 15.5.4.11 00297 * String.prototype.replace. In addition, during search and replace 00298 * operations all non-overlapping occurrences of the regular expression 00299 * are located and replaced, and sections of the input that did not match 00300 * the expression are copied unchanged to the output string. 00301 * 00302 * Format strings (from ECMA-262 [15.5.4.11]): 00303 * @li $$ The dollar-sign itself ($) 00304 * @li $& The matched substring. 00305 * @li $` The portion of @a string that precedes the matched substring. 00306 * This would be match_results::prefix(). 00307 * @li $' The portion of @a string that follows the matched substring. 00308 * This would be match_results::suffix(). 00309 * @li $n The nth capture, where n is in [1,9] and $n is not followed by a 00310 * decimal digit. If n <= match_results::size() and the nth capture 00311 * is undefined, use the empty string instead. If n > 00312 * match_results::size(), the result is implementation-defined. 00313 * @li $nn The nnth capture, where nn is a two-digit decimal number on 00314 * [01, 99]. If nn <= match_results::size() and the nth capture is 00315 * undefined, use the empty string instead. If 00316 * nn > match_results::size(), the result is implementation-defined. 00317 */ 00318 format_default = 0, 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 POSIX sed utility 00323 * in IEEE Std 1003.1- 2001 [IEEE, Information Technology -- Portable 00324 * Operating System Interface (POSIX), IEEE Standard 1003.1-2001]. 00325 */ 00326 format_sed = 1 << _S_sed, 00327 00328 /** 00329 * During a search and replace operation, sections of the character 00330 * container sequence being searched that do not match the regular 00331 * expression shall not be copied to the output string. 00332 */ 00333 format_no_copy = 1 << _S_no_copy, 00334 00335 /** 00336 * When specified during a search and replace operation, only the first 00337 * occurrence of the regular expression shall be replaced. 00338 */ 00339 format_first_only = 1 << _S_first_only, 00340 }; 00341 00342 constexpr inline match_flag_type 00343 operator&(match_flag_type __a, match_flag_type __b) 00344 { 00345 return (match_flag_type)(static_cast<unsigned int>(__a) 00346 & static_cast<unsigned int>(__b)); 00347 } 00348 00349 constexpr inline match_flag_type 00350 operator|(match_flag_type __a, match_flag_type __b) 00351 { 00352 return (match_flag_type)(static_cast<unsigned int>(__a) 00353 | static_cast<unsigned int>(__b)); 00354 } 00355 00356 constexpr inline match_flag_type 00357 operator^(match_flag_type __a, match_flag_type __b) 00358 { 00359 return (match_flag_type)(static_cast<unsigned int>(__a) 00360 ^ static_cast<unsigned int>(__b)); 00361 } 00362 00363 constexpr inline match_flag_type 00364 operator~(match_flag_type __a) 00365 { return (match_flag_type)(~static_cast<unsigned int>(__a)); } 00366 00367 inline match_flag_type& 00368 operator&=(match_flag_type& __a, match_flag_type __b) 00369 { return __a = __a & __b; } 00370 00371 inline match_flag_type& 00372 operator|=(match_flag_type& __a, match_flag_type __b) 00373 { return __a = __a | __b; } 00374 00375 inline match_flag_type& 00376 operator^=(match_flag_type& __a, match_flag_type __b) 00377 { return __a = __a ^ __b; } 00378 00379 //@} 00380 00381 _GLIBCXX_END_NAMESPACE_VERSION 00382 } // namespace regex_constants 00383 00384 /* @} */ // group regex 00385 } // namespace std 00386