std::regex_constants::syntax_option_type

 

C++

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Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

 

Regular expressions library

Classes

basic_regex (C++11)

sub_match (C++11)

match_results (C++11)

Algorithms

regex_match (C++11)

regex_search (C++11)

regex_replace (C++11)

Iterators

regex_iterator (C++11)

regex_token_iterator (C++11)

Exceptions

regex_error (C++11)

Traits

regex_traits (C++11)

Constants

syntax_option_type (C++11)

match_flag_type (C++11)

error_type (C++11)

 

Defined in header <regex>
typedef /*unspecified*/ syntax_option_type; static constexpr syntax_option_type icase = /*unspecified*/; static constexpr syntax_option_type nosubs = /*unspecified*/; static constexpr syntax_option_type optimize = /*unspecified*/; static constexpr syntax_option_type collate = /*unspecified*/; static constexpr syntax_option_type ECMAScript = /*unspecified*/; static constexpr syntax_option_type basic = /*unspecified*/; static constexpr syntax_option_type extended = /*unspecified*/; static constexpr syntax_option_type awk = /*unspecified*/; static constexpr syntax_option_type grep = /*unspecified*/; static constexpr syntax_option_type egrep = /*unspecified*/;

The syntax_option_type is a type that contains options that govern how regular expressions behave.

The possible values for this type (icase, optimize, etc.) are duplicated inside std::basic_regex.

Constants

Value	Effect(s)
icase	Character matching should be performed without regard to case.
nosubs	When performing matches, no sub-expression matches should be stored in the supplied std::regex_match structure.
optimize	Instructs the regular expression engine to make matching faster, with the potential cost of making construction slower. For example, this might mean converting a non-deterministic FSA to a deterministic FSA.
collate	Character ranges of the form "[a-b]" will be locale sensitive.
ECMAScript	Use a modified version of the ECMAScript regular expression grammar (ECMA-262). ECMA-262 is also known as JavaScript and is effectively the same as Perl5. (grammar documentation)
basic	Use the basic POSIX regular expression grammar (grammar documentation).
extended	Use the extended POSIX regular expression grammar (grammar documentation).
awk	Use the regular expression grammar used by the awk utility in POSIX (grammar documentation)
grep	Use the regular expression grammar used by the grep utility in POSIX. This is effectively the same as the basic option with the addition of newline '\n' as an alternation separator.
egrep	Use the regular expression grammar used by the grep utility, with the -E option, in POSIX. This is effectively the same as the extended option with the addition of newline '\n' as an alternation separator in addtion to '|'.

See also

basic_regex	(class)