Corvus.Ecma262.RegularExpressions Namespace

The regular expression engine: Regex with the members of System.Text.RegularExpressions.Regex, the Match, Group and Capture results, the allocation-free ValueMatch and ValueCapture with their enumerators over UTF-16 and UTF-8, the RegexFlags of ECMA-262, and GeneratedRegexAttribute for the source generator.

Regex — a compiled pattern, and the static members for one-off use
RegexFlags — the flags of ECMA-262
GeneratedRegexAttribute — the matcher as code at build time
ValueMatch and ValueCapture — a match and a group as positions, allocating nothing

Type	Kind	Description
Capture	class	A piece of the input text that a match or a group captured.
CaptureCollection	class	The captures of a group: one when the group took part, none otherwise.
GeneratedRegexAttribute	class	Marks a `static partial` method or property that returns a `Regex` for the source generator, which checks the pattern at build time (a pattern t...
Group	class	What one capturing group of a match captured.
GroupCollection	class	The groups of a match: the whole match as group 0, then each capturing group in the order of its opening parenthesis.
Match	class	One match of a pattern in a text, with what each of its groups captured.
MatchCollection	class	Every match of a pattern in a text, found as they are asked for: a global search as ECMA-262 makes one.
MatchEvaluator	delegate	Gives the replacement for one match.
Regex	class	An ECMA-262 regular expression: the grammar and the answers of ECMAScript 2025, with the shape of `System.Text.RegularExpressions.Regex`. It matches UTF-16 text (...
RegexFlags	enum	The flags of an ECMA-262 regular expression: those of `RegExp`, by name.
RegexMatchTimeoutException	class	The error of a match that was abandoned at its limit: it ran for longer than the match timeout, or it needed more backtracking memory than a match may hold. Neither is an answer.
RegexParseException	class	The error of a pattern that is not a valid ECMA-262 pattern in the grammar of its flags.
RegexPatternTooLargeException	class	The error of a pattern that is over one of the limits of size, which bound the time and the memory that reading and compiling a pattern take whatever the pattern holds. It is not the error of a pat...
SpanMatchEvaluator	delegate	Gives the replacement for one match in a UTF-16 text by writing it.
Utf8MatchEvaluator	delegate	Gives the replacement for one match in a UTF-8 text by writing it.
Utf8ValueMatchEnumerator	struct	Enumerates the matches of a pattern in a UTF-8 text as a global search, allocating nothing.
Utf8ValueSplitEnumerator	struct	Enumerates the pieces a UTF-8 text splits into at the matches of a pattern, as positions, allocating nothing (see...
ValueCapture	struct	What one group captured, with nothing allocated: the position and the length in the units of the text, or that the group did not take part.
ValueMatch	struct	Where a match is in a text, with nothing allocated: the position and the length, in the units of the text.
ValueMatchEnumerator	struct	Enumerates the matches of a pattern in a UTF-16 text as a global search, allocating nothing.
ValueSplitEnumerator	struct	Enumerates the pieces a UTF-16 text splits into at the matches of a pattern, as positions, allocating nothing (see...

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