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Diffstat (limited to 'libstdc++-v3/include/bits/regex_constants.h')
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diff --git a/libstdc++-v3/include/bits/regex_constants.h b/libstdc++-v3/include/bits/regex_constants.h new file mode 100644 index 000000000..bddef3a26 --- /dev/null +++ b/libstdc++-v3/include/bits/regex_constants.h @@ -0,0 +1,301 @@ +// class template regex -*- C++ -*- + +// Copyright (C) 2010, 2011 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// Under Section 7 of GPL version 3, you are granted additional +// permissions described in the GCC Runtime Library Exception, version +// 3.1, as published by the Free Software Foundation. + +// You should have received a copy of the GNU General Public License and +// a copy of the GCC Runtime Library Exception along with this program; +// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +// <http://www.gnu.org/licenses/>. + +/** + * @file bits/regex_constants.h + * @brief Constant definitions for the std regex library. + * + * This is an internal header file, included by other library headers. + * Do not attempt to use it directly. @headername{regex} + */ + +namespace std _GLIBCXX_VISIBILITY(default) +{ +/** + * @namespace std::regex_constants + * @brief ISO C++-0x entities sub namespace for regex. + */ +namespace regex_constants +{ +_GLIBCXX_BEGIN_NAMESPACE_VERSION + + /** + * @name 5.1 Regular Expression Syntax Options + */ + //@{ + enum __syntax_option + { + _S_icase, + _S_nosubs, + _S_optimize, + _S_collate, + _S_ECMAScript, + _S_basic, + _S_extended, + _S_awk, + _S_grep, + _S_egrep, + _S_syntax_last + }; + + /** + * @brief This is a bitmask type indicating how to interpret the regex. + * + * The @c syntax_option_type is implementation defined but it is valid to + * perform bitwise operations on these values and expect the right thing to + * happen. + * + * A valid value of type syntax_option_type shall have exactly one of the + * elements @c ECMAScript, @c basic, @c extended, @c awk, @c grep, @c egrep + * %set. + */ + typedef unsigned int syntax_option_type; + + /** + * Specifies that the matching of regular expressions against a character + * sequence shall be performed without regard to case. + */ + static constexpr syntax_option_type icase = 1 << _S_icase; + + /** + * Specifies that when a regular expression is matched against a character + * container sequence, no sub-expression matches are to be stored in the + * supplied match_results structure. + */ + static constexpr syntax_option_type nosubs = 1 << _S_nosubs; + + /** + * Specifies that the regular expression engine should pay more attention to + * the speed with which regular expressions are matched, and less to the + * speed with which regular expression objects are constructed. Otherwise + * it has no detectable effect on the program output. + */ + static constexpr syntax_option_type optimize = 1 << _S_optimize; + + /** + * Specifies that character ranges of the form [a-b] should be locale + * sensitive. + */ + static constexpr syntax_option_type collate = 1 << _S_collate; + + /** + * Specifies that the grammar recognized by the regular expression engine is + * that used by ECMAScript in ECMA-262 [Ecma International, ECMAScript + * Language Specification, Standard Ecma-262, third edition, 1999], as + * modified in section [28.13]. This grammar is similar to that defined + * in the PERL scripting language but extended with elements found in the + * POSIX regular expression grammar. + */ + static constexpr syntax_option_type ECMAScript = 1 << _S_ECMAScript; + + /** + * Specifies that the grammar recognized by the regular expression engine is + * that used by POSIX basic regular expressions in IEEE Std 1003.1-2001, + * Portable Operating System Interface (POSIX), Base Definitions and + * Headers, Section 9, Regular Expressions [IEEE, Information Technology -- + * Portable Operating System Interface (POSIX), IEEE Standard 1003.1-2001]. + */ + static constexpr syntax_option_type basic = 1 << _S_basic; + + /** + * Specifies that the grammar recognized by the regular expression engine is + * that used by POSIX extended regular expressions in IEEE Std 1003.1-2001, + * Portable Operating System Interface (POSIX), Base Definitions and Headers, + * Section 9, Regular Expressions. + */ + static constexpr syntax_option_type extended = 1 << _S_extended; + + /** + * Specifies that the grammar recognized by the regular expression engine is + * that used by POSIX utility awk in IEEE Std 1003.1-2001. This option is + * identical to syntax_option_type extended, except that C-style escape + * sequences are supported. These sequences are: + * \\\\, \\a, \\b, \\f, \\n, \\r, \\t , \\v, \\', ', + * and \\ddd (where ddd is one, two, or three octal digits). + */ + static constexpr syntax_option_type awk = 1 << _S_awk; + + /** + * Specifies that the grammar recognized by the regular expression engine is + * that used by POSIX utility grep in IEEE Std 1003.1-2001. This option is + * identical to syntax_option_type basic, except that newlines are treated + * as whitespace. + */ + static constexpr syntax_option_type grep = 1 << _S_grep; + + /** + * Specifies that the grammar recognized by the regular expression engine is + * that used by POSIX utility grep when given the -E option in + * IEEE Std 1003.1-2001. This option is identical to syntax_option_type + * extended, except that newlines are treated as whitespace. + */ + static constexpr syntax_option_type egrep = 1 << _S_egrep; + + //@} + + /** + * @name 5.2 Matching Rules + * + * Matching a regular expression against a sequence of characters [first, + * last) proceeds according to the rules of the grammar specified for the + * regular expression object, modified according to the effects listed + * below for any bitmask elements set. + * + */ + //@{ + + enum __match_flag + { + _S_not_bol, + _S_not_eol, + _S_not_bow, + _S_not_eow, + _S_any, + _S_not_null, + _S_continuous, + _S_prev_avail, + _S_sed, + _S_no_copy, + _S_first_only, + _S_match_flag_last + }; + + /** + * @brief This is a bitmask type indicating regex matching rules. + * + * The @c match_flag_type is implementation defined but it is valid to + * perform bitwise operations on these values and expect the right thing to + * happen. + */ + typedef std::bitset<_S_match_flag_last> match_flag_type; + + /** + * The default matching rules. + */ + static constexpr match_flag_type match_default = 0; + + /** + * The first character in the sequence [first, last) is treated as though it + * is not at the beginning of a line, so the character (^) in the regular + * expression shall not match [first, first). + */ + static constexpr match_flag_type match_not_bol = 1 << _S_not_bol; + + /** + * The last character in the sequence [first, last) is treated as though it + * is not at the end of a line, so the character ($) in the regular + * expression shall not match [last, last). + */ + static constexpr match_flag_type match_not_eol = 1 << _S_not_eol; + + /** + * The expression \\b is not matched against the sub-sequence + * [first,first). + */ + static constexpr match_flag_type match_not_bow = 1 << _S_not_bow; + + /** + * The expression \\b should not be matched against the sub-sequence + * [last,last). + */ + static constexpr match_flag_type match_not_eow = 1 << _S_not_eow; + + /** + * If more than one match is possible then any match is an acceptable + * result. + */ + static constexpr match_flag_type match_any = 1 << _S_any; + + /** + * The expression does not match an empty sequence. + */ + static constexpr match_flag_type match_not_null = 1 << _S_not_null; + + /** + * The expression only matches a sub-sequence that begins at first . + */ + static constexpr match_flag_type match_continuous = 1 << _S_continuous; + + /** + * --first is a valid iterator position. When this flag is set then the + * flags match_not_bol and match_not_bow are ignored by the regular + * expression algorithms 28.11 and iterators 28.12. + */ + static constexpr match_flag_type match_prev_avail = 1 << _S_prev_avail; + + /** + * When a regular expression match is to be replaced by a new string, the + * new string is constructed using the rules used by the ECMAScript replace + * function in ECMA- 262 [Ecma International, ECMAScript Language + * Specification, Standard Ecma-262, third edition, 1999], part 15.5.4.11 + * String.prototype.replace. In addition, during search and replace + * operations all non-overlapping occurrences of the regular expression + * are located and replaced, and sections of the input that did not match + * the expression are copied unchanged to the output string. + * + * Format strings (from ECMA-262 [15.5.4.11]): + * @li $$ The dollar-sign itself ($) + * @li $& The matched substring. + * @li $` The portion of @a string that precedes the matched substring. + * This would be match_results::prefix(). + * @li $' The portion of @a string that follows the matched substring. + * This would be match_results::suffix(). + * @li $n The nth capture, where n is in [1,9] and $n is not followed by a + * decimal digit. If n <= match_results::size() and the nth capture + * is undefined, use the empty string instead. If n > + * match_results::size(), the result is implementation-defined. + * @li $nn The nnth capture, where nn is a two-digit decimal number on + * [01, 99]. If nn <= match_results::size() and the nth capture is + * undefined, use the empty string instead. If + * nn > match_results::size(), the result is implementation-defined. + */ + static constexpr match_flag_type format_default = 0; + + /** + * When a regular expression match is to be replaced by a new string, the + * new string is constructed using the rules used by the POSIX sed utility + * in IEEE Std 1003.1- 2001 [IEEE, Information Technology -- Portable + * Operating System Interface (POSIX), IEEE Standard 1003.1-2001]. + */ + static constexpr match_flag_type format_sed = 1 << _S_sed; + + /** + * During a search and replace operation, sections of the character + * container sequence being searched that do not match the regular + * expression shall not be copied to the output string. + */ + static constexpr match_flag_type format_no_copy = 1 << _S_no_copy; + + /** + * When specified during a search and replace operation, only the first + * occurrence of the regular expression shall be replaced. + */ + static constexpr match_flag_type format_first_only = 1 << _S_first_only; + + //@} + +_GLIBCXX_END_NAMESPACE_VERSION +} // namespace regex_constants +} // namespace + |