Front page | perl.perl5.porters |
Postings from January 2022
On 2022-01-19 11:14 p.m., Yuki Kimoto wrote:
> 2022-1-20 14:20 Darren Duncan wrote:
> So here's a question. The way signatures work now, if one puts "@" at the end
> of the signature,
>
> Would you recommend the following code to Perl users if they want the old codes
> to be a signature without changing its behavior?
> # Old code
> sub f1 {
> my ($a1, $a2) = @_;
> }
>
> # ...
>
> sub f1000 ($a1, $a2) {
> my ($a1, $a2) = @_;
> }
>
> # New codes
> use feature 'signatures';
>
> sub f1 ($a1, $a2, @) {
> }
>
> # ...
>
> sub f1000 ($a1, $a2, @) {
> }
Yes I would. That is the textbook example for the most common cases of a
subroutine where we want to use signatures while preserving the old behavior
including the lack of arity check.
Well except for the common idiom of a combined getter/setter, which I personally
don't like but it is common. So in that case you would have in the new version
of that like this:
sub myaccessor ($name, @maybe_new_value) {
if (scalar @maybe_new_value > 0)
$props->{$name} = $maybe_new_value[0];
}
return $props->{$name};
}
-- Darren Duncan
Thread Previous
|
Thread Next