Front page | perl.perl5.porters |
Postings from October 2015
On Mon, Oct 19, 2015 at 08:33:51AM -0600, Karl Williamson wrote:
> On 10/19/2015 08:26 AM, Abigail wrote:
>> $ perl -wE '"aaaaaaaaaa" =~ /a { 1,10}/x; say $& // "UNDEF"'
>> UNDEF
>> $
>>
>> (In this case, it tries to match the literal string "a{1,10}" -- one
>> can wonder whether that's the most useful thing it could do).
>
> Note that this now give a warning, even without the '-w' command line
> option:
>
> $ blead -E '"aaaaaaaaaa" =~ /a { 1,10}/x; say $& // "UNDEF"'
> Unescaped left brace in regex is deprecated, passed through in regex;
> marked by <-- HERE in m/a { <-- HERE 1,10}/ at -e line 1.
> UNDEF
> $
Yes, I know.
Is that useful? I'd wager that of all the people who write
/a { 1,10}/x
more than 99.9% of want it to behave like
/a {1,10}/x
and none of them actually want to match the literal string
"a{1,10}"
Abigail (who has put a space after the , in /x{n,m}/ way too often).
Thread Previous
|
Thread Next