Except that PCREs (or most of their implementations which are used in all those languages, re2 and Go's standard regexp package are exceptions) have some fundam

Except that PCREs (or most of their implementations which are used in all those languages, re2 and Go's standard regexp package are exceptions) have some fundamental issues: http://swtch.com/~rsc/regexp/regexp1.html http://swtch.com/~rsc/regexp/regexp1.html