Re: ERROR ... nested quantifiers in regex

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Re^2: ERROR ... nested quantifiers in regex by Anonymous Monk on Jul 06, 2011 at 11:59 UTC
FWIW, v5.12.2 has no trouble "parsing" this regex `Compiling REx "%n ( # start of bracket 1%n {{ # match an opening + {{ b"... Final program: 1: OPEN1 (3) 3: EXACT <{{> (5) 5: CURLYX[0] {0,32767} (30) 7: BRANCH (24) 8: SUSPEND (29) 10: PLUS (22) 11: ANYOF[\0-z\|~-\377][{unicode_all}] (0) 22: SUCCEED (0) 23: TAIL (28) 24: BRANCH (FAIL) 25: GOSUB1[-24] (29) 28: TAIL (29) 29: WHILEM[2/1] (0) 30: NOTHING (31) 31: EXACT <}}> (33) 33: CLOSE1 (35) 35: END (0) anchored "{{" at 0 floating "}}" at 2..2147483647 (checking floating) +minlen 4` [download] and `(?1) # recurse to bracket 1` appears to be a feature introduced in 5.10 (?PARNO) (?-PARNO) (?+PARNO) (?R) (?0)	[reply] [d/l] [select]
Re^3: ERROR ... nested quantifiers in regex by ŞuRvīvőr (Novice) on Jul 06, 2011 at 12:34 UTC
I think this maybe the problem, because I use active perl 5.8, I guess I have to download the newest version ... I'll try it and then let you know, thanks a lot for your support	[reply]
Re^2: ERROR ... nested quantifiers in regex by ŞuRvīvőr (Novice) on Jul 06, 2011 at 11:45 UTC
it seems that this line `[^{}]++ # one or more {} brackets, non backtracking` is causing the error ... and to be honest, I tried to understand it but i couldn't	[reply] [d/l]
Re^3: ERROR ... nested quantifiers in regex by Anonymous Monk on Jul 06, 2011 at 12:20 UTC
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)	[reply]
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
Re^2: ERROR ... nested quantifiers in regex by ŞuRvīvőr (Novice) on Jul 06, 2011 at 11:42 UTC
I replaced every { and every } with \{\} and still giving the same error	[reply]