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Postings from June 2021
On Wed, Jun 30, 2021 at 12:42 PM Nicholas Clark <nick@ccl4.org> wrote:
> It seems that if $ is matched, it needs to be the (logical) end of the
> pattern, else the entire pattern matches. By "logical", I mean that other
> text follow in the regex, but it needs to be other alternations, or
> something
> else that doesn't contribute to matching. It can't be more characters, even
> if they are present on the next line.
>
You can match more characters, but you need to consume the newline
first. (The $ is a zero-width lookahead assertion – it does not consume
anything.)
eirik@rustybox[14:54:32]~$ perl
use 5.16.0;
for (qr'$\sbar'm, qr'$.*bar'ms) {
say "foo\nbar" =~ $_ ? "Matched: $&" : "Nope"
}
__END__
Matched:
bar
Matched:
bar
eirik@rustybox[15:00:14]~$
basically, is there any string that qr'$foo'm will match?
>
No, no more than there is a string that qr/(?=bar)foo/ will match. Need
to consume that bar first.
Eirik
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