VSS/source/regexp

RegExp engine

This regexp engine should implement ECMAScript Regular Expression (Unicode Mode), but currently only part of specification is implemented.

For now we have:

RegExp	Description
x y	Match the x then y
x | y	Match either the x or y
x *	Match the x zero or more times
(:? x )	Non-capturing group
( x )	Capturing group
\p{ N }	Char of the general category N
\P{ N }	Char not of the general category N
[ x ]	Character class x
[^ x ]	Character not in the class x
[ x - y ]	Character in range x..y
[\p{ N }]	Char of the general category N
[\P{ N }]	Char not of the general category N
^	Start of line assertion
$	End of line assertion
\b	Word boundary assertion
\B	Not a word boundary assertion
x	Character literal x, not in ^$.*+?]{}
\ x	Character literal x in ^$.*+?]{}

Useful articles

• https://swtch.com/~rsc/regexp/