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Re^2: look-ahead greed changed between perl releases?

by raygun (Beadle)
on May 06, 2014 at 18:15 UTC ( #1085217=note: print w/replies, xml ) Need Help??


in reply to Re: look-ahead greed changed between perl releases?
in thread look-ahead greed changed between perl releases?

So that overrides the greediness precept? The perlre document isn't clear on this, so I wasn't sure which behavior was considered correct.

I no longer have a 5.12.4 handy either: I discovered this issue after upgrading perl and finding my code was no longer working as it had before. Was this a bug in a 5.12.4? I can't find anything in the perl*delta docs that lead me to believe this is an intentional behavior change.

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Re^3: look-ahead greed changed between perl releases?
by sn1987a (Chaplain) on May 06, 2014 at 18:29 UTC

    No, it does not override the greediness. The regexp still matches that longest string. But this is just a look ahead. Once the match/substitution is made, the regexp engine starts searching again after the first character matched.

    amon below has a great graphical view of what is happening (Re: look-ahead greed changed between perl releases?).

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