Re^3: ERROR ... nested quantifiers in regex

You need to use a perl older than 5.10 to use these regex features you were trying to use, they were introduced in

p595-Possessive Quantifiers: Perl now supports the "possessive quantifier" syntax of the "atomic match" pattern. Basically a possessive quantifier matches as much as it can and never gives any back. Thus it can be used to control backtracking. The syntax is similar to non-greedy matching, except instead of using a '?' as the modifier the '+' is used. Thus ?+, *+, ++, {min,max}+ are now legal quantifiers. (Yves Orton)

Comment on Re^3: ERROR ... nested quantifiers in regex

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Re^4: ERROR ... nested quantifiers in regex by AnomalousMonk (Archbishop) on Jul 06, 2011 at 20:05 UTC
... a perl older than 5.10 ... Should be: "... a Perl of version 5.10 or newer ...".	[reply]
Re^5: ERROR ... nested quantifiers in regex by Anonymous Monk on Jun 10, 2012 at 07:01 UTC
Right :) older in the human sense, bigger age (version number )	[reply]