Regular Expressions 101

Pro

Group 1((?=(?!\bTODO\b)*?;).*)

Positive Lookahead(?=(?!\bTODO\b)*?;)

Negative Lookahead(?!\bTODO\b)*?

*?repeats the group contents below any number of times:

\ban ASCII word boundary

TODOthe literal text TODO (case sensitive)

\ban ASCII word boundary

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

.*any character (except for line terminators), repeated any number of times

Group 2((?=.*?\bTODO\b).*)

Positive Lookahead(?=.*?\bTODO\b)

.*?any character (except for line terminators), repeated any number of times

\ban ASCII word boundary

TODOthe literal text TODO (case sensitive)

\ban ASCII word boundary

.*any character (except for line terminators), repeated any number of times

Negated Character Class[^\n]

\na line-feed (newline) character (ASCII 10)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

((?=(?!\bTODO\b)*?;).*)((?=.*?\bTODO\b).*)[^\n]

New

; comment that contains TODO - correct
TODO := 5 ; comment that isn't valid t-o-d-o
; regular comment

$1"address":

; comment that contains TODO - correct
TODO := 5 ; comment that isn't valid t-o-d-o
; regular comment