11.2.0/bits/regex_constants.h

// class template regex -*- C++ -*-

// Copyright (C) 2010-2021 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)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

/**
 * @defgroup regex Regular Expressions
 *
 * A facility for performing regular expression pattern matching.
 * @{
 */

/**
 * @namespace std::regex_constants
 * @brief ISO C++ 2011 namespace for options and flags used with std::regex
 */
namespace regex_constants
{
  /**
   * @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_polynomial,
    _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.
   */
  enum syntax_option_type : unsigned int { };

  /**
   * Specifies that the matching of regular expressions against a character
   * sequence shall be performed without regard to case.
   */
  _GLIBCXX17_INLINE constexpr syntax_option_type icase =
    static_cast<syntax_option_type>(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.
   */
  _GLIBCXX17_INLINE constexpr syntax_option_type nosubs =
    static_cast<syntax_option_type>(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.
   */
  _GLIBCXX17_INLINE constexpr syntax_option_type optimize =
    static_cast<syntax_option_type>(1 << _S_optimize);

  /**
   * Specifies that character ranges of the form [a-b] should be locale
   * sensitive.
   */
  _GLIBCXX17_INLINE constexpr syntax_option_type collate =
    static_cast<syntax_option_type>(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.
   */
  _GLIBCXX17_INLINE constexpr syntax_option_type ECMAScript =
    static_cast<syntax_option_type>(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].
   */
  _GLIBCXX17_INLINE constexpr syntax_option_type basic =
    static_cast<syntax_option_type>(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.
   */
  _GLIBCXX17_INLINE constexpr syntax_option_type extended =
    static_cast<syntax_option_type>(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, \\&apos,, &apos,,
   * and \\ddd (where ddd is one, two, or three octal digits).
   */
  _GLIBCXX17_INLINE constexpr syntax_option_type awk =
    static_cast<syntax_option_type>(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.
   */
  _GLIBCXX17_INLINE constexpr syntax_option_type grep =
    static_cast<syntax_option_type>(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.
   */
  _GLIBCXX17_INLINE constexpr syntax_option_type egrep =
    static_cast<syntax_option_type>(1 << _S_egrep);

  /**
   * Extension: Ensure both space complexity of compiled regex and
   * time complexity execution are not exponential.
   * If specified in a regex with back-references, the exception
   * regex_constants::error_complexity will be thrown.
   */
  _GLIBCXX17_INLINE constexpr syntax_option_type __polynomial =
    static_cast<syntax_option_type>(1 << _S_polynomial);

  constexpr inline syntax_option_type
  operator&(syntax_option_type __a, syntax_option_type __b)
  {
    return (syntax_option_type)(static_cast<unsigned int>(__a)
                                & static_cast<unsigned int>(__b));
  }

  constexpr inline syntax_option_type
  operator|(syntax_option_type __a, syntax_option_type __b)
  {
    return (syntax_option_type)(static_cast<unsigned int>(__a)
                                | static_cast<unsigned int>(__b));
  }

  constexpr inline syntax_option_type
  operator^(syntax_option_type __a, syntax_option_type __b)
  {
    return (syntax_option_type)(static_cast<unsigned int>(__a)
                                ^ static_cast<unsigned int>(__b));
  }

  constexpr inline syntax_option_type
  operator~(syntax_option_type __a)
  { return (syntax_option_type)(~static_cast<unsigned int>(__a)); }

  inline syntax_option_type&
  operator&=(syntax_option_type& __a, syntax_option_type __b)
  { return __a = __a & __b; }

  inline syntax_option_type&
  operator|=(syntax_option_type& __a, syntax_option_type __b)
  { return __a = __a | __b; }

  inline syntax_option_type&
  operator^=(syntax_option_type& __a, syntax_option_type __b)
  { return __a = __a ^ __b; }

  ///@}

  /**
   * @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.
   */
  enum match_flag_type : unsigned int { };

  /**
   * The default matching rules.
   */
  _GLIBCXX17_INLINE constexpr match_flag_type match_default =
    static_cast<match_flag_type>(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).
   */
  _GLIBCXX17_INLINE constexpr match_flag_type match_not_bol =
    static_cast<match_flag_type>(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).
   */
  _GLIBCXX17_INLINE constexpr match_flag_type match_not_eol =
    static_cast<match_flag_type>(1 << _S_not_eol);

  /**
   * The expression \\b is not matched against the sub-sequence
   * [first,first).
   */
  _GLIBCXX17_INLINE constexpr match_flag_type match_not_bow =
    static_cast<match_flag_type>(1 << _S_not_bow);

  /**
   * The expression \\b should not be matched against the sub-sequence
   * [last,last).
   */
  _GLIBCXX17_INLINE constexpr match_flag_type match_not_eow =
    static_cast<match_flag_type>(1 << _S_not_eow);

  /**
   * If more than one match is possible then any match is an acceptable
   * result.
   */
  _GLIBCXX17_INLINE constexpr match_flag_type match_any =
    static_cast<match_flag_type>(1 << _S_any);

  /**
   * The expression does not match an empty sequence.
   */
  _GLIBCXX17_INLINE constexpr match_flag_type match_not_null =
    static_cast<match_flag_type>(1 << _S_not_null);

  /**
   * The expression only matches a sub-sequence that begins at first .
   */
  _GLIBCXX17_INLINE constexpr match_flag_type match_continuous =
    static_cast<match_flag_type>(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.
   */
  _GLIBCXX17_INLINE constexpr match_flag_type match_prev_avail =
    static_cast<match_flag_type>(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.
   */
  _GLIBCXX17_INLINE constexpr match_flag_type format_default =
    static_cast<match_flag_type>(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].
   */
  _GLIBCXX17_INLINE constexpr match_flag_type format_sed =
    static_cast<match_flag_type>(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.
   */
  _GLIBCXX17_INLINE constexpr match_flag_type format_no_copy =
    static_cast<match_flag_type>(1 << _S_no_copy);

  /**
   * When specified during a search and replace operation, only the first
   * occurrence of the regular expression shall be replaced.
   */
  _GLIBCXX17_INLINE constexpr match_flag_type format_first_only =
    static_cast<match_flag_type>(1 << _S_first_only);

  constexpr inline match_flag_type
  operator&(match_flag_type __a, match_flag_type __b)
  {
    return (match_flag_type)(static_cast<unsigned int>(__a)
                                & static_cast<unsigned int>(__b));
  }

  constexpr inline match_flag_type
  operator|(match_flag_type __a, match_flag_type __b)
  {
    return (match_flag_type)(static_cast<unsigned int>(__a)
                                | static_cast<unsigned int>(__b));
  }

  constexpr inline match_flag_type
  operator^(match_flag_type __a, match_flag_type __b)
  {
    return (match_flag_type)(static_cast<unsigned int>(__a)
                                ^ static_cast<unsigned int>(__b));
  }

  constexpr inline match_flag_type
  operator~(match_flag_type __a)
  { return (match_flag_type)(~static_cast<unsigned int>(__a)); }

  inline match_flag_type&
  operator&=(match_flag_type& __a, match_flag_type __b)
  { return __a = __a & __b; }

  inline match_flag_type&
  operator|=(match_flag_type& __a, match_flag_type __b)
  { return __a = __a | __b; }

  inline match_flag_type&
  operator^=(match_flag_type& __a, match_flag_type __b)
  { return __a = __a ^ __b; }

  ///@}
} // namespace regex_constants
/// @} group regex

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std

Revision:	1166
Committed:	Tue Oct 26 14:22:36 2021 UTC (4 years ago) by rossy
Content type:	text/x-chdr
File size:	14728 byte(s)
Log Message:	Daodan: Replace MinGW build env with an up-to-date MSYS2 env
#	Content
1	// class template regex -- C++ --
2
3	// Copyright (C) 2010-2021 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_constants.h
27	* @brief Constant definitions for the std regex library.
28	*
29	* This is an internal header file, included by other library headers.
30	* Do not attempt to use it directly. @headername{regex}
31	*/
32
33	namespace std _GLIBCXX_VISIBILITY(default)
34	{
35	_GLIBCXX_BEGIN_NAMESPACE_VERSION
36
37	/**
38	* @defgroup regex Regular Expressions
39	*
40	* A facility for performing regular expression pattern matching.
41	* @{
42	*/
43
44	/**
45	* @namespace std::regex_constants
46	* @brief ISO C++ 2011 namespace for options and flags used with std::regex
47	*/
48	namespace regex_constants
49	{
50	/**
51	* @name 5.1 Regular Expression Syntax Options
52	*/
53	///@{
54	enum __syntax_option
55	{
56	_S_icase,
57	_S_nosubs,
58	_S_optimize,
59	_S_collate,
60	_S_ECMAScript,
61	_S_basic,
62	_S_extended,
63	_S_awk,
64	_S_grep,
65	_S_egrep,
66	_S_polynomial,
67	_S_syntax_last
68	};
69
70	/**
71	* @brief This is a bitmask type indicating how to interpret the regex.
72	*
73	* The @c syntax_option_type is implementation defined but it is valid to
74	* perform bitwise operations on these values and expect the right thing to
75	* happen.
76	*
77	* A valid value of type syntax_option_type shall have exactly one of the
78	* elements @c ECMAScript, @c basic, @c extended, @c awk, @c grep, @c egrep
79	* %set.
80	*/
81	enum syntax_option_type : unsigned int { };
82
83	/**
84	* Specifies that the matching of regular expressions against a character
85	* sequence shall be performed without regard to case.
86	*/
87	_GLIBCXX17_INLINE constexpr syntax_option_type icase =
88	static_cast<syntax_option_type>(1 << _S_icase);
89
90	/**
91	* Specifies that when a regular expression is matched against a character
92	* container sequence, no sub-expression matches are to be stored in the
93	* supplied match_results structure.
94	*/
95	_GLIBCXX17_INLINE constexpr syntax_option_type nosubs =
96	static_cast<syntax_option_type>(1 << _S_nosubs);
97
98	/**
99	* Specifies that the regular expression engine should pay more attention to
100	* the speed with which regular expressions are matched, and less to the
101	* speed with which regular expression objects are constructed. Otherwise
102	* it has no detectable effect on the program output.
103	*/
104	_GLIBCXX17_INLINE constexpr syntax_option_type optimize =
105	static_cast<syntax_option_type>(1 << _S_optimize);
106
107	/**
108	* Specifies that character ranges of the form [a-b] should be locale
109	* sensitive.
110	*/
111	_GLIBCXX17_INLINE constexpr syntax_option_type collate =
112	static_cast<syntax_option_type>(1 << _S_collate);
113
114	/**
115	* Specifies that the grammar recognized by the regular expression engine is
116	* that used by ECMAScript in ECMA-262 [Ecma International, ECMAScript
117	* Language Specification, Standard Ecma-262, third edition, 1999], as
118	* modified in section [28.13]. This grammar is similar to that defined
119	* in the PERL scripting language but extended with elements found in the
120	* POSIX regular expression grammar.
121	*/
122	_GLIBCXX17_INLINE constexpr syntax_option_type ECMAScript =
123	static_cast<syntax_option_type>(1 << _S_ECMAScript);
124
125	/**
126	* Specifies that the grammar recognized by the regular expression engine is
127	* that used by POSIX basic regular expressions in IEEE Std 1003.1-2001,
128	* Portable Operating System Interface (POSIX), Base Definitions and
129	* Headers, Section 9, Regular Expressions [IEEE, Information Technology --
130	* Portable Operating System Interface (POSIX), IEEE Standard 1003.1-2001].
131	*/
132	_GLIBCXX17_INLINE constexpr syntax_option_type basic =
133	static_cast<syntax_option_type>(1 << _S_basic);
134
135	/**
136	* Specifies that the grammar recognized by the regular expression engine is
137	* that used by POSIX extended regular expressions in IEEE Std 1003.1-2001,
138	* Portable Operating System Interface (POSIX), Base Definitions and
139	* Headers, Section 9, Regular Expressions.
140	*/
141	_GLIBCXX17_INLINE constexpr syntax_option_type extended =
142	static_cast<syntax_option_type>(1 << _S_extended);
143
144	/**
145	* Specifies that the grammar recognized by the regular expression engine is
146	* that used by POSIX utility awk in IEEE Std 1003.1-2001. This option is
147	* identical to syntax_option_type extended, except that C-style escape
148	* sequences are supported. These sequences are:
149	* \\\\, \\a, \\b, \\f, \\n, \\r, \\t , \\v, \\&apos,, &apos,,
150	* and \\ddd (where ddd is one, two, or three octal digits).
151	*/
152	_GLIBCXX17_INLINE constexpr syntax_option_type awk =
153	static_cast<syntax_option_type>(1 << _S_awk);
154
155	/**
156	* Specifies that the grammar recognized by the regular expression engine is
157	* that used by POSIX utility grep in IEEE Std 1003.1-2001. This option is
158	* identical to syntax_option_type basic, except that newlines are treated
159	* as whitespace.
160	*/
161	_GLIBCXX17_INLINE constexpr syntax_option_type grep =
162	static_cast<syntax_option_type>(1 << _S_grep);
163
164	/**
165	* Specifies that the grammar recognized by the regular expression engine is
166	* that used by POSIX utility grep when given the -E option in
167	* IEEE Std 1003.1-2001. This option is identical to syntax_option_type
168	* extended, except that newlines are treated as whitespace.
169	*/
170	_GLIBCXX17_INLINE constexpr syntax_option_type egrep =
171	static_cast<syntax_option_type>(1 << _S_egrep);
172
173	/**
174	* Extension: Ensure both space complexity of compiled regex and
175	* time complexity execution are not exponential.
176	* If specified in a regex with back-references, the exception
177	* regex_constants::error_complexity will be thrown.
178	*/
179	_GLIBCXX17_INLINE constexpr syntax_option_type __polynomial =
180	static_cast<syntax_option_type>(1 << _S_polynomial);
181
182	constexpr inline syntax_option_type
183	operator&(syntax_option_type __a, syntax_option_type __b)
184	{
185	return (syntax_option_type)(static_cast<unsigned int>(__a)
186	& static_cast<unsigned int>(__b));
187	}
188
189	constexpr inline syntax_option_type
190	operator\|(syntax_option_type __a, syntax_option_type __b)
191	{
192	return (syntax_option_type)(static_cast<unsigned int>(__a)
193	\| static_cast<unsigned int>(__b));
194	}
195
196	constexpr inline syntax_option_type
197	operator^(syntax_option_type __a, syntax_option_type __b)
198	{
199	return (syntax_option_type)(static_cast<unsigned int>(__a)
200	^ static_cast<unsigned int>(__b));
201	}
202
203	constexpr inline syntax_option_type
204	operator~(syntax_option_type __a)
205	{ return (syntax_option_type)(~static_cast<unsigned int>(__a)); }
206
207	inline syntax_option_type&
208	operator&=(syntax_option_type& __a, syntax_option_type __b)
209	{ return __a = __a & __b; }
210
211	inline syntax_option_type&
212	operator\|=(syntax_option_type& __a, syntax_option_type __b)
213	{ return __a = __a \| __b; }
214
215	inline syntax_option_type&
216	operator^=(syntax_option_type& __a, syntax_option_type __b)
217	{ return __a = __a ^ __b; }
218
219	///@}
220
221	/**
222	* @name 5.2 Matching Rules
223	*
224	* Matching a regular expression against a sequence of characters [first,
225	* last) proceeds according to the rules of the grammar specified for the
226	* regular expression object, modified according to the effects listed
227	* below for any bitmask elements set.
228	*
229	*/
230	///@{
231
232	enum __match_flag
233	{
234	_S_not_bol,
235	_S_not_eol,
236	_S_not_bow,
237	_S_not_eow,
238	_S_any,
239	_S_not_null,
240	_S_continuous,
241	_S_prev_avail,
242	_S_sed,
243	_S_no_copy,
244	_S_first_only,
245	_S_match_flag_last
246	};
247
248	/**
249	* @brief This is a bitmask type indicating regex matching rules.
250	*
251	* The @c match_flag_type is implementation defined but it is valid to
252	* perform bitwise operations on these values and expect the right thing to
253	* happen.
254	*/
255	enum match_flag_type : unsigned int { };
256
257	/**
258	* The default matching rules.
259	*/
260	_GLIBCXX17_INLINE constexpr match_flag_type match_default =
261	static_cast<match_flag_type>(0);
262
263	/**
264	* The first character in the sequence [first, last) is treated as though it
265	* is not at the beginning of a line, so the character (^) in the regular
266	* expression shall not match [first, first).
267	*/
268	_GLIBCXX17_INLINE constexpr match_flag_type match_not_bol =
269	static_cast<match_flag_type>(1 << _S_not_bol);
270
271	/**
272	* The last character in the sequence [first, last) is treated as though it
273	* is not at the end of a line, so the character ($) in the regular
274	* expression shall not match [last, last).
275	*/
276	_GLIBCXX17_INLINE constexpr match_flag_type match_not_eol =
277	static_cast<match_flag_type>(1 << _S_not_eol);
278
279	/**
280	* The expression \\b is not matched against the sub-sequence
281	* [first,first).
282	*/
283	_GLIBCXX17_INLINE constexpr match_flag_type match_not_bow =
284	static_cast<match_flag_type>(1 << _S_not_bow);
285
286	/**
287	* The expression \\b should not be matched against the sub-sequence
288	* [last,last).
289	*/
290	_GLIBCXX17_INLINE constexpr match_flag_type match_not_eow =
291	static_cast<match_flag_type>(1 << _S_not_eow);
292
293	/**
294	* If more than one match is possible then any match is an acceptable
295	* result.
296	*/
297	_GLIBCXX17_INLINE constexpr match_flag_type match_any =
298	static_cast<match_flag_type>(1 << _S_any);
299
300	/**
301	* The expression does not match an empty sequence.
302	*/
303	_GLIBCXX17_INLINE constexpr match_flag_type match_not_null =
304	static_cast<match_flag_type>(1 << _S_not_null);
305
306	/**
307	* The expression only matches a sub-sequence that begins at first .
308	*/
309	_GLIBCXX17_INLINE constexpr match_flag_type match_continuous =
310	static_cast<match_flag_type>(1 << _S_continuous);
311
312	/**
313	* --first is a valid iterator position. When this flag is set then the
314	* flags match_not_bol and match_not_bow are ignored by the regular
315	* expression algorithms 28.11 and iterators 28.12.
316	*/
317	_GLIBCXX17_INLINE constexpr match_flag_type match_prev_avail =
318	static_cast<match_flag_type>(1 << _S_prev_avail);
319
320	/**
321	* When a regular expression match is to be replaced by a new string, the
322	* new string is constructed using the rules used by the ECMAScript replace
323	* function in ECMA- 262 [Ecma International, ECMAScript Language
324	* Specification, Standard Ecma-262, third edition, 1999], part 15.5.4.11
325	* String.prototype.replace. In addition, during search and replace
326	* operations all non-overlapping occurrences of the regular expression
327	* are located and replaced, and sections of the input that did not match
328	* the expression are copied unchanged to the output string.
329	*
330	* Format strings (from ECMA-262 [15.5.4.11]):
331	* @li $$ The dollar-sign itself ($)
332	* @li $& The matched substring.
333	* @li $` The portion of @a string that precedes the matched substring.
334	* This would be match_results::prefix().
335	* @li $' The portion of @a string that follows the matched substring.
336	* This would be match_results::suffix().
337	* @li $n The nth capture, where n is in [1,9] and $n is not followed by a
338	* decimal digit. If n <= match_results::size() and the nth capture
339	* is undefined, use the empty string instead. If n >
340	* match_results::size(), the result is implementation-defined.
341	* @li $nn The nnth capture, where nn is a two-digit decimal number on
342	* [01, 99]. If nn <= match_results::size() and the nth capture is
343	* undefined, use the empty string instead. If
344	* nn > match_results::size(), the result is implementation-defined.
345	*/
346	_GLIBCXX17_INLINE constexpr match_flag_type format_default =
347	static_cast<match_flag_type>(0);
348
349	/**
350	* When a regular expression match is to be replaced by a new string, the
351	* new string is constructed using the rules used by the POSIX sed utility
352	* in IEEE Std 1003.1- 2001 [IEEE, Information Technology -- Portable
353	* Operating System Interface (POSIX), IEEE Standard 1003.1-2001].
354	*/
355	_GLIBCXX17_INLINE constexpr match_flag_type format_sed =
356	static_cast<match_flag_type>(1 << _S_sed);
357
358	/**
359	* During a search and replace operation, sections of the character
360	* container sequence being searched that do not match the regular
361	* expression shall not be copied to the output string.
362	*/
363	_GLIBCXX17_INLINE constexpr match_flag_type format_no_copy =
364	static_cast<match_flag_type>(1 << _S_no_copy);
365
366	/**
367	* When specified during a search and replace operation, only the first
368	* occurrence of the regular expression shall be replaced.
369	*/
370	_GLIBCXX17_INLINE constexpr match_flag_type format_first_only =
371	static_cast<match_flag_type>(1 << _S_first_only);
372
373	constexpr inline match_flag_type
374	operator&(match_flag_type __a, match_flag_type __b)
375	{
376	return (match_flag_type)(static_cast<unsigned int>(__a)
377	& static_cast<unsigned int>(__b));
378	}
379
380	constexpr inline match_flag_type
381	operator\|(match_flag_type __a, match_flag_type __b)
382	{
383	return (match_flag_type)(static_cast<unsigned int>(__a)
384	\| static_cast<unsigned int>(__b));
385	}
386
387	constexpr inline match_flag_type
388	operator^(match_flag_type __a, match_flag_type __b)
389	{
390	return (match_flag_type)(static_cast<unsigned int>(__a)
391	^ static_cast<unsigned int>(__b));
392	}
393
394	constexpr inline match_flag_type
395	operator~(match_flag_type __a)
396	{ return (match_flag_type)(~static_cast<unsigned int>(__a)); }
397
398	inline match_flag_type&
399	operator&=(match_flag_type& __a, match_flag_type __b)
400	{ return __a = __a & __b; }
401
402	inline match_flag_type&
403	operator\|=(match_flag_type& __a, match_flag_type __b)
404	{ return __a = __a \| __b; }
405
406	inline match_flag_type&
407	operator^=(match_flag_type& __a, match_flag_type __b)
408	{ return __a = __a ^ __b; }
409
410	///@}
411	} // namespace regex_constants
412	/// @} group regex
413
414	_GLIBCXX_END_NAMESPACE_VERSION
415	} // namespace std
416