Re: Oddness with regex quantifiers

This is not specific to Perl. In the POSIX standard for Extended Regular Expressions (The Open Group Base Specifications Issue 7):

...an interval expression of the format "{m}" , "{m,}" , or "{m,n}"

And yes, Perl supports many other extensions that are not in POSIX.

Comment on Re: Oddness with regex quantifiers

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Re^2: Oddness with regex quantifiers by talexb (Chancellor) on Nov 25, 2010 at 15:32 UTC
Too bad .. I just thought for the sake of orthogonality that `{,m]` should have been present, with an implied 1 for the missing value. But it sounds like there are equally good arguments for having the implied value be 0 .. so perhaps the decision was made not to implement that grammar at all. Lesson learned .. thanks for the udpate. Alex / talexb / Toronto "Groklaw is the open-source mentality applied to legal research" ~ Linus Torvalds	[reply] [d/l]

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Re^2: Oddness with regex quantifiers
by talexb (Chancellor) on Nov 25, 2010 at 15:32 UTC

Too bad .. I just thought for the sake of orthogonality that {,m] should have been present, with an implied 1 for the missing value. But it sounds like there are equally good arguments for having the implied value be 0 .. so perhaps the decision was made not to implement that grammar at all.

Lesson learned .. thanks for the udpate.

Alex / talexb / Toronto

"Groklaw is the open-source mentality applied to legal research" ~ Linus Torvalds

[reply]
[d/l]