Feature: Flags
Home | Features | Improve this section
Flags control certain aspects of the matching behavior of a pattern.
Syntax
NOTE: The following syntax is an example based on some of the supported engines. For specific engine support, see Engines.
The following flags are supported:
i— Ignore Case. Matches character classes using a case-insensitive comparison.m— Multiline. Causes the anchors^and$to match the start and end of each line (respectively), rather than the start and end of the input.s— Singleline. Causes the wildcard.to match newline characters.x— Extended Mode. Ignores whitespace in a pattern. Spaces must instead be represented by\sor\(an escaped space).
Engines
| Engine | Supported |
|---|---|
| Perl | ✔ |
| PCRE | ✔ |
| Boost.Regex | ✔ |
| .NET | ✔ |
| Oniguruma | ✔ |
| Hyperscan | ✔ |
| ICU | ✔ |
| Glib/GRegex | ✔ |
| ECMAScript | ✔ |