bionic (3) std::regex_constants.3cxx.gz
NAME
std::regex_constants
SYNOPSIS
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 }
enum syntax_option_type : unsigned int
constexpr syntax_option_type icase
constexpr syntax_option_type nosubs
constexpr syntax_option_type optimize
constexpr syntax_option_type collate
constexpr syntax_option_type ECMAScript
constexpr syntax_option_type basic
constexpr syntax_option_type extended
constexpr syntax_option_type awk
constexpr syntax_option_type grep
constexpr syntax_option_type egrep
constexpr syntax_option_type operator & (syntax_option_type __a, syntax_option_type __b)
constexpr syntax_option_type operator| (syntax_option_type __a, syntax_option_type __b)
constexpr syntax_option_type operator^ (syntax_option_type __a, syntax_option_type __b)
constexpr syntax_option_type operator~ (syntax_option_type __a)
syntax_option_type & operator &= (syntax_option_type &__a, syntax_option_type __b)
syntax_option_type & operator|= (syntax_option_type &__a, syntax_option_type __b)
syntax_option_type & operator^= (syntax_option_type &__a, syntax_option_type __b)
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 }
enum match_flag_type : unsigned int
constexpr match_flag_type match_default
constexpr match_flag_type match_not_bol
constexpr match_flag_type match_not_eol
constexpr match_flag_type match_not_bow
constexpr match_flag_type match_not_eow
constexpr match_flag_type match_any
constexpr match_flag_type match_not_null
constexpr match_flag_type match_continuous
constexpr match_flag_type match_prev_avail
constexpr match_flag_type format_default
constexpr match_flag_type format_sed
constexpr match_flag_type format_no_copy
constexpr match_flag_type format_first_only
constexpr match_flag_type operator & (match_flag_type __a, match_flag_type __b)
constexpr match_flag_type operator| (match_flag_type __a, match_flag_type __b)
constexpr match_flag_type operator^ (match_flag_type __a, match_flag_type __b)
constexpr match_flag_type operator~ (match_flag_type __a)
match_flag_type & operator &= (match_flag_type &__a, match_flag_type __b)
match_flag_type & operator|= (match_flag_type &__a, match_flag_type __b)
match_flag_type & operator^= (match_flag_type &__a, match_flag_type __b)
5.3 Error Types
enum error_type { _S_error_collate, _S_error_ctype, _S_error_escape, _S_error_backref, _S_error_brack,
_S_error_paren, _S_error_brace, _S_error_badbrace, _S_error_range, _S_error_space,
_S_error_badrepeat, _S_error_complexity, _S_error_stack }
constexpr error_type error_collate (_S_error_collate)
constexpr error_type error_ctype (_S_error_ctype)
constexpr error_type error_escape (_S_error_escape)
constexpr error_type error_backref (_S_error_backref)
constexpr error_type error_brack (_S_error_brack)
constexpr error_type error_paren (_S_error_paren)
constexpr error_type error_brace (_S_error_brace)
constexpr error_type error_badbrace (_S_error_badbrace)
constexpr error_type error_range (_S_error_range)
constexpr error_type error_space (_S_error_space)
constexpr error_type error_badrepeat (_S_error_badrepeat)
constexpr error_type error_complexity (_S_error_complexity)
constexpr error_type error_stack (_S_error_stack)
Detailed Description
ISO C++-0x entities sub namespace for regex.
Enumeration Type Documentation
enum std::regex_constants::__match_flag
This is a bitmask type indicating regex matching rules. The match_flag_type is implementation defined but
it is valid to perform bitwise operations on these values and expect the right thing to happen.
Definition at line 222 of file regex_constants.h.
enum std::regex_constants::__syntax_option
This is a bitmask type indicating how to interpret the regex. The 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 ECMAScript, basic,
extended, awk, grep, egrep set.
Definition at line 54 of file regex_constants.h.
enum std::regex_constants::error_type
The expression contained an invalid collating element name.
Definition at line 49 of file regex_error.h.
enum std::regex_constants::match_flag_type : unsigned int
This is a bitmask type indicating regex matching rules. The match_flag_type is implementation defined but
it is valid to perform bitwise operations on these values and expect the right thing to happen.
Definition at line 245 of file regex_constants.h.
enum std::regex_constants::syntax_option_type : unsigned int
This is a bitmask type indicating how to interpret the regex. The 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 ECMAScript, basic,
extended, awk, grep, egrep set.
Definition at line 80 of file regex_constants.h.
Function Documentation
constexpr error_type std::regex_constants::error_backref (_S_error_backref)
The expression contained an invalid back reference.
constexpr error_type std::regex_constants::error_badbrace (_S_error_badbrace)
The expression contained an invalid range in a {} expression.
constexpr error_type std::regex_constants::error_badrepeat (_S_error_badrepeat)
One of *?+{ was not preceded by a valid regular expression.
constexpr error_type std::regex_constants::error_brace (_S_error_brace)
The expression contained mismatched { and }
constexpr error_type std::regex_constants::error_brack (_S_error_brack)
The expression contained mismatched [ and ].
constexpr error_type std::regex_constants::error_collate (_S_error_collate)
The expression contained an invalid collating element name.
constexpr error_type std::regex_constants::error_complexity (_S_error_complexity)
The complexity of an attempted match against a regular expression exceeded a pre-set level.
constexpr error_type std::regex_constants::error_ctype (_S_error_ctype)
The expression contained an invalid character class name.
constexpr error_type std::regex_constants::error_escape (_S_error_escape)
The expression contained an invalid escaped character, or a trailing escape.
constexpr error_type std::regex_constants::error_paren (_S_error_paren)
The expression contained mismatched ( and ).
constexpr error_type std::regex_constants::error_range (_S_error_range)
The expression contained an invalid character range, such as [b-a] in most encodings.
constexpr error_type std::regex_constants::error_space (_S_error_space)
There was insufficient memory to convert the expression into a finite state machine.
constexpr error_type std::regex_constants::error_stack (_S_error_stack)
There was insufficient memory to determine whether the regular expression could match the specified
character sequence.
constexpr syntax_option_type std::regex_constants::operator& (syntax_option_type __a, syntax_option_type __b)
[inline]
This is a bitmask type indicating how to interpret the regex. The 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 ECMAScript, basic,
extended, awk, grep, egrep set.
Definition at line 173 of file regex_constants.h.
constexpr match_flag_type std::regex_constants::operator& (match_flag_type __a, match_flag_type __b) [inline]
This is a bitmask type indicating regex matching rules. The match_flag_type is implementation defined but
it is valid to perform bitwise operations on these values and expect the right thing to happen.
Definition at line 362 of file regex_constants.h.
syntax_option_type& std::regex_constants::operator&= (syntax_option_type & __a, syntax_option_type __b)
[inline]
This is a bitmask type indicating how to interpret the regex. The 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 ECMAScript, basic,
extended, awk, grep, egrep set.
Definition at line 198 of file regex_constants.h.
match_flag_type& std::regex_constants::operator&= (match_flag_type & __a, match_flag_type __b) [inline]
This is a bitmask type indicating regex matching rules. The match_flag_type is implementation defined but
it is valid to perform bitwise operations on these values and expect the right thing to happen.
Definition at line 387 of file regex_constants.h.
constexpr syntax_option_type std::regex_constants::operator^ (syntax_option_type __a, syntax_option_type __b)
[inline]
This is a bitmask type indicating how to interpret the regex. The 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 ECMAScript, basic,
extended, awk, grep, egrep set.
Definition at line 187 of file regex_constants.h.
constexpr match_flag_type std::regex_constants::operator^ (match_flag_type __a, match_flag_type __b) [inline]
This is a bitmask type indicating regex matching rules. The match_flag_type is implementation defined but
it is valid to perform bitwise operations on these values and expect the right thing to happen.
Definition at line 376 of file regex_constants.h.
syntax_option_type& std::regex_constants::operator^= (syntax_option_type & __a, syntax_option_type __b)
[inline]
This is a bitmask type indicating how to interpret the regex. The 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 ECMAScript, basic,
extended, awk, grep, egrep set.
Definition at line 206 of file regex_constants.h.
match_flag_type& std::regex_constants::operator^= (match_flag_type & __a, match_flag_type __b) [inline]
This is a bitmask type indicating regex matching rules. The match_flag_type is implementation defined but
it is valid to perform bitwise operations on these values and expect the right thing to happen.
Definition at line 395 of file regex_constants.h.
constexpr syntax_option_type std::regex_constants::operator| (syntax_option_type __a, syntax_option_type __b)
[inline]
This is a bitmask type indicating how to interpret the regex. The 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 ECMAScript, basic,
extended, awk, grep, egrep set.
Definition at line 180 of file regex_constants.h.
constexpr match_flag_type std::regex_constants::operator| (match_flag_type __a, match_flag_type __b) [inline]
This is a bitmask type indicating regex matching rules. The match_flag_type is implementation defined but
it is valid to perform bitwise operations on these values and expect the right thing to happen.
Definition at line 369 of file regex_constants.h.
syntax_option_type& std::regex_constants::operator|= (syntax_option_type & __a, syntax_option_type __b)
[inline]
This is a bitmask type indicating how to interpret the regex. The 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 ECMAScript, basic,
extended, awk, grep, egrep set.
Definition at line 202 of file regex_constants.h.
match_flag_type& std::regex_constants::operator|= (match_flag_type & __a, match_flag_type __b) [inline]
This is a bitmask type indicating regex matching rules. The match_flag_type is implementation defined but
it is valid to perform bitwise operations on these values and expect the right thing to happen.
Definition at line 391 of file regex_constants.h.
constexpr syntax_option_type std::regex_constants::operator~ (syntax_option_type __a) [inline]
This is a bitmask type indicating how to interpret the regex. The 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 ECMAScript, basic,
extended, awk, grep, egrep set.
Definition at line 194 of file regex_constants.h.
constexpr match_flag_type std::regex_constants::operator~ (match_flag_type __a) [inline]
This is a bitmask type indicating regex matching rules. The match_flag_type is implementation defined but
it is valid to perform bitwise operations on these values and expect the right thing to happen.
Definition at line 383 of file regex_constants.h.
Variable Documentation
constexpr syntax_option_type std::regex_constants::awk
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).
Definition at line 151 of file regex_constants.h.
Referenced by std::regex_traits< _Ch_type >::getloc().
constexpr syntax_option_type std::regex_constants::basic
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].
Definition at line 131 of file regex_constants.h.
Referenced by std::regex_traits< _Ch_type >::getloc().
constexpr syntax_option_type std::regex_constants::collate
Specifies that character ranges of the form [a-b] should be locale sensitive.
Definition at line 110 of file regex_constants.h.
Referenced by std::regex_traits< _Ch_type >::getloc().
constexpr syntax_option_type std::regex_constants::ECMAScript
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.
Definition at line 121 of file regex_constants.h.
Referenced by std::regex_traits< _Ch_type >::getloc().
constexpr syntax_option_type std::regex_constants::egrep
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.
Definition at line 169 of file regex_constants.h.
Referenced by std::regex_traits< _Ch_type >::getloc().
constexpr syntax_option_type std::regex_constants::extended
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.
Definition at line 140 of file regex_constants.h.
Referenced by std::regex_traits< _Ch_type >::getloc().
constexpr match_flag_type std::regex_constants::format_default
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]):
• $$ The dollar-sign itself ($)
• $& The matched substring.
• $` The portion of string that precedes the matched substring. This would be match_results::prefix().
• $' The portion of string that follows the matched substring. This would be match_results::suffix().
• $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.
• $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.
Definition at line 335 of file regex_constants.h.
Referenced by std::match_results< _Bi_iter >::cend().
constexpr match_flag_type std::regex_constants::format_first_only
When specified during a search and replace operation, only the first occurrence of the regular expression
shall be replaced.
Definition at line 358 of file regex_constants.h.
Referenced by std::regex_replace().
constexpr match_flag_type std::regex_constants::format_no_copy
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.
Definition at line 351 of file regex_constants.h.
Referenced by std::regex_replace().
constexpr match_flag_type std::regex_constants::format_sed
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].
Definition at line 343 of file regex_constants.h.
constexpr syntax_option_type std::regex_constants::grep
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.
Definition at line 160 of file regex_constants.h.
Referenced by std::regex_traits< _Ch_type >::getloc().
constexpr syntax_option_type std::regex_constants::icase
Specifies that the matching of regular expressions against a character sequence shall be performed
without regard to case.
Definition at line 86 of file regex_constants.h.
Referenced by std::regex_traits< _Ch_type >::getloc().
constexpr match_flag_type std::regex_constants::match_any
If more than one match is possible then any match is an acceptable result.
Definition at line 286 of file regex_constants.h.
constexpr match_flag_type std::regex_constants::match_continuous
The expression only matches a sub-sequence that begins at first .
Definition at line 298 of file regex_constants.h.
Referenced by std::regex_iterator< _Bi_iter, _Ch_type, _Rx_traits >::operator++().
constexpr match_flag_type std::regex_constants::match_default
The default matching rules.
Definition at line 250 of file regex_constants.h.
Referenced by std::regex_iterator< _Bi_iter, _Ch_type, _Rx_traits >::regex_iterator(),
std::regex_match(), std::regex_replace(), std::regex_search(), and std::regex_token_iterator< _Bi_iter,
_Ch_type, _Rx_traits >::regex_token_iterator().
constexpr match_flag_type std::regex_constants::match_not_bol
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).
Definition at line 257 of file regex_constants.h.
constexpr match_flag_type std::regex_constants::match_not_bow
The expression \b is not matched against the sub-sequence [first,first).
Definition at line 272 of file regex_constants.h.
constexpr match_flag_type std::regex_constants::match_not_eol
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).
Definition at line 265 of file regex_constants.h.
constexpr match_flag_type std::regex_constants::match_not_eow
The expression \b should not be matched against the sub-sequence [last,last).
Definition at line 279 of file regex_constants.h.
constexpr match_flag_type std::regex_constants::match_not_null
The expression does not match an empty sequence.
Definition at line 292 of file regex_constants.h.
Referenced by std::regex_iterator< _Bi_iter, _Ch_type, _Rx_traits >::operator++().
constexpr match_flag_type std::regex_constants::match_prev_avail
--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.
Definition at line 306 of file regex_constants.h.
constexpr syntax_option_type std::regex_constants::nosubs
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.
Definition at line 94 of file regex_constants.h.
Referenced by std::regex_traits< _Ch_type >::getloc().
constexpr syntax_option_type std::regex_constants::optimize
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.
Definition at line 103 of file regex_constants.h.
Referenced by std::regex_traits< _Ch_type >::getloc().
Author
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