Front page | perl.perl6.language |
Postings from May 2005
Carl Franks wrote:
> I have a class that normally takes a list of named arguments.
> I also want to be able to handle a single argument.
>
> class Foo {
> multi method new (Class $class: Str $date) {
> return $class.bless(date => $date);
> }
>
> submethod BUILD ($.date, $.time, $.offset) {
> # some error checking here
> }
> }
>
> my $foo = Foo.new('2005-05-30');
>
> #
> Is this the correct way to handle my scenario?
It's *a* correct way. But redundant in this particular case.
The universal new() would handle the one-argument call exactly the same
as your overloaded new() does. Presumably, however, the one-argument variant
would do something else as well.
> My explicit 'new' method should only handle the case of
> a single argument - otherwise the 'new' method
> inherited from Class will handle a list of named
> arguments.
Correct.
> My explicit BUILD submethod is called, regardless
> of which 'new' method is called, correct?
Yes. It's invoked by bless().
Damian
Thread Previous
|
Thread Next