Re: Re: Yet another regex bug.

That implies that "removing the comment" is the translation...

/abc(?#comment)+/  ----> /abc(?#comment)+/ /abc+/

Where as I (and evidently at least 2 other people) expect it to be the translation...

/abc(?#comment)+/  ------> /abc()+/

Updated: forgot to acctually make the translation i was trying to show.

Comment on Re: Re: Yet another regex bug.

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Re (3): Yet another regex bug. by VSarkiss (Monsignor) on Nov 12, 2002 at 03:33 UTC
Well, your first line is the identity transformation, which isn't removing anything. ;-) The parentheses surrounding the `?#` are part of the syntax; that is, the comment marker in a regexp begins `(?#`, not `?#`. (Check perlre: all the "funny" extended-pattern elements start with `(?`, one of the reasons being that it's a mnemonic to "question" what's coming next.¹) Thus if you're removing the comment you should remove the parentheses as well. ¹I don't buy the explanation, by the way, but it's there..	[reply] [d/l] [select]

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Re (3): Yet another regex bug.
by VSarkiss (Monsignor) on Nov 12, 2002 at 03:33 UTC

Well, your first line is the identity transformation, which isn't removing anything. ;-)

The parentheses surrounding the ?# are part of the syntax; that is, the comment marker in a regexp begins (?#, not ?#. (Check perlre: all the "funny" extended-pattern elements start with (?, one of the reasons being that it's a mnemonic to "question" what's coming next.¹) Thus if you're removing the comment you should remove the parentheses as well.

¹I don't buy the explanation, by the way, but it's there..

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