Ahmed Salah Ahmed Salah - 3 years ago 154
Perl Question

Match balanced brackets after certain string

I am having trouble matching balanced brackets after a certain string"if". I know that I can match balanced brackets using


and that works just fine. However, when I add my string "if" before the this regular expression to be

if[ \t]*((?>[^()]|(?R))?\)

It only matches single balanced brackets after "if".

online demo: https://regex101.com/r/6lg0qi/3

Answer Source

(?R) means recursing whole pattern while you need to recurs chunk of it:

if[ \t]*(\((?>[^()]+|(?1))*\))

Live demo

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