Front page | perl.perl5.porters |
Postings from September 2023
On Mon, Sep 04, 2023 at 06:25:57PM +0300, Ivan Vorontsov wrote:
> > f($x, $y //= 1, $z = 2) # $y is optional parameter
>
> This is an intermediate case. To a caller $y is optional, but $y
> must have undef value either explicitly or implicitly to trigger the
> assignment, $z must not accept argument at all to get assigned. I would
> call $y semi-optional :)
I don't understand what you are trying to say there. The difference
between a mandatory and optional argument is that perl will croak()
if not enough mandatory arguments are passed to the function.
Given
f($x, $y //= 1, $z = 2) # $y is optional parameter
what do you expect the result to be for each of these (i.e. croak, or $y
assigned the value 2, or whatever)?
f(1);
f(1,2);
f(1, undef);
f(1, 2, undef);
--
Monto Blanco... scorchio!
Thread Previous
|
Thread Next