Hi!
On Thu, August 20, 2009 11:49, River Tarnell wrote:
> seth wrote:
>> I'm not very experienced in rewrite-regexp. But in perl (and php's pcre,
>> ...) this would not be a good work-around, because the capture buffer
>> would sometimes be created and sometimes not.
>
> i was not able to reproduce this behaviour, or else i misunderstood your
> meaning. i tested with the following script:
>
> #! /usr/bin/env perl
use strict;
use warnings;
> if ($ARGV[0] =~ /^(.*\/)?(.*)$/) {
> print "1: $1\n2: $2\n";
> }
> [...]
> which produced this output:
>
> % ./test.pl foo
> 1:
"Use of uninitialized value in concatenation (.) or string ..."
> 2: foo
> even when the ?-expression was not matched, it created an empty
> backreference, so the following expression was always $2.
in one case $1 is an empty string, in the other case $1 is undef.
prosit
seth
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