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Postings from September 2023
On Tue, 5 Sep 2023 22:55:46 +0300
Ivan Vorontsov <ivrntsv@yandex.ru> wrote:
> Wouldn't it be convenient to write as:
> # $v, $w, $x are mandatory; $y, $z are optional
> sub bar ($v, $w //= 42, $x, $y //= 1, $z = 2) {
> }
If you want $w to be mandatory, you can't put a defaulting expression
on it.
If you still want its value to be 42 if the caller *explicitly decided
to pass undef*, that's that regular code inside the function is for.
sub bar ($v, $w, $x, $y //= 1, $z = 2) {
$w //= 42;
...
}
--
Paul "LeoNerd" Evans
leonerd@leonerd.org.uk | https://metacpan.org/author/PEVANS
http://www.leonerd.org.uk/ | https://www.tindie.com/stores/leonerd/
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