Feature: Collating Elements
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A Collating Element is one or more characters that collate as a single unit.
Syntax
NOTE: The following syntax is an example based on some of the supported engines. For specific engine support, see Engines.
[[.col.]]— Matches the collating element col if col is treated as a single collating unit in the current locale. Example:[[.ae.]-c]matches a single character in the range “ae”-“c”. col may also be specified by a symbolic name.
Engines
| Engine | Supported |
|---|---|
| Perl | ❌ |
| PCRE | ❌ |
| Boost.Regex | ✔ |
| .NET | ❌ |
| Oniguruma | ❌ |
| Hyperscan | ❌ |
| ICU | ❌ |
| Glib/GRegex | ❌ |
| ECMAScript | ❌ |
See Also
- Character Classes
- Posix Character Classes
- Negated Posix Character Classes
- Equivalence Classes
- Character Class Escapes
- Line Endings Escape
- Character Property Escapes
- Character Class Nested Set
- Character Class Intersection
- Character Class Union
- Character Class Subtraction
- Character Class Symmetric Difference
- Character Class Complement