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Postings from April 2008
Quoting James Mcclure <perlbug-followup@perl.org>:
>
> # perl zero-length regex bug
>
> # instructions:
> # 1) run with $ARGV[0] = 1, this script prints false
> # 2) run with $ARGV[0] = 2, this script prints true
> # 3) comment out the $ARGV[0] =~ /1/ line --> this script prints true
> $ARGV[0] =~ /1/;
> if ( '' =~ // ) { print "true\n"; }
> else { print "false\n"; }
>
> -----------------------------------------------------------------
Hello,
Thank you for your bug report but this is not a bug.
If you use an empty pattern after a re then it uses the pattern of the
last succesful match.
It is mentioned in
http://perldoc.perl.org/perlretut.html#Using-regular-expressions-in-Perl
But perhaps it could/should be documented more clearly... (I can't
easily find it in perlre for example - or atleast not using a basic
search)
Kind regards,
Bram
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