Re^3: Regex: matching character which happens exactly once (using global memory)

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Re^4: Regex: matching character which happens exactly once (updated) by LanX (Cardinal) on Oct 23, 2017 at 14:50 UTC
What is the right thing??? I can only judge the implementation, which considers $1 ff to be global. update This demonstrates whats happening, $2 is always the next character or empty. `DB<322> ;m/ ^ .? (?{say "<$_ $2>"}) (.) (?=(.\|$)) (FAIL)/x <babab > <babab a> <babab b> <babab a> <babab b> <babab >` [download] Cheers Rolf _{(addicted to the Perl Programming Language and ☆☆☆☆ :) Je suis Charlie!}	[reply] [d/l]
Re^5: Regex: matching character which happens exactly once (updated) by QM (Parson) on Oct 23, 2017 at 16:57 UTC
You're asking theoretical questions, and then getting bogged down in current implementation. Turn this around. What would you want to happen if you had a forward reference? -QM -- Quantum Mechanics: The dreams stuff is made of	[reply]
Re^6: Regex: matching character which happens exactly once (updated) by LanX (Cardinal) on Oct 23, 2017 at 18:51 UTC
You seem to think it's a bug, for me it's most likely a feature. I think this stems from the foundations of regular expressions as state machines. > What would you want to happen if you had a forward reference? Something wonderful, HAL! Cheers Rolf _{(addicted to the Perl Programming Language and ☆☆☆☆ :) Je suis Charlie!}	[reply]