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Postings from January 2022
On Monday, 24 January 2022, 20:22:52 CET, Paul "LeoNerd" Evans <leonerd@leonerd.org.uk> wrote:
> You mean like
>
> use v5.26;
> use Syntax::Keyword::MultiSub;
> use experimental 'signatures';
>
> multi sub max() { return undef; }
> multi sub max($x) { return $x; }
> multi sub max($x, @more) { my $y = max(@more);
> return $x > $y ? $x : $y; }
>
> -- https://metacpan.org/pod/Syntax::Keyword::MultiSub
>
> Doesn't yet support `multi method ...` but I keep meaning to get around
> to starting implementing that.
>
> > No, I'm not suggesting we do that,
>
> Oh, I am ;)
What do we do with this?
sub max :multi(@args) {...}
sub max :multi(%args) {...}
Because arrays and hashes flatten into a list, unless @args has an odd number of elements, we can't disambiguate them, can we?
Java also has ambiguous cases which fail, but always at compile-time. I don't think we can do that, but I would be delighted to be wrong.
Best,
Ovid
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