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Postings from July 2022
On Mon, Jul 25, 2022 at 06:28:14PM +0000, Konovalov, Vadim via perl5-porters wrote: > > The fact that neither $00 nor $0 has any relation to regular expressions is > > irrelevant, because ALL identifiers that start with digits are reserved in > > Perl. $0, for instance, is the name of the program being executed. > > Regexp ones are read-only, $0 isn't Read-only or not, they're still reserved. > > > > > > Not a big deal, actually. > > > > > > I accept the point that my usage of perl is often non-common, with lots of non-standard approaches, so no-one else uses $00, so dropping $00 support is ok. > > > > It seems to me the fact that you were ever able to use $00 was a bug in those > > versions of Perl which has now been fixed. > > No > > $ perl -we '$0="qwerty"; print $0' > qwerty > > there is a concept that perl can "lie" itself on $0 Again, you're using an identifier reserved by Perl. $0 is a special case documented in perlvar saying it's OK to modify it. I haven't been able to find anything that implies it should be OK to use $00. In any language, if you use reserved words for your own purposes you run the risk of the behavior changing in future versions. Unfortunately you got burned here.Thread Previous | Thread Next