What's the meaning of "?>" in the regular expression


(Thorzhang) #1

Below is a regular expression In grok-patterns (url: https://github.com/logstash-plugins/logstash-patterns-core/blob/master/patterns/grok-patterns), I don't know the meanings of "?>".

YEAR (?>\d\d){1,2}
Can anyone help me, Thanks.


(Faulander) #2

This should get you going: https://www.regular-expressions.info/atomic.html