You could just do:
method new (Str $value?) { ... } # makes value optional
and then not pass anything to .new.
On Tue, Feb 23, 2016 at 1:27 PM TS xx <maringa...@hotmail.com> wrote:
> Thanks Brandon,
>
>
> That was what I was looking for.
>
> I'm trying it already.
>
>
> Regards,
>
> Emiliano
>
>
> ------------------------------
> *From:* Brandon Allbery <allber...@gmail.com>
> *Sent:* Tuesday, February 23, 2016 2:21 AM
> *To:* TS xx
> *Cc:* perl6-us...@perl.org
>
> *Subject:* Re: Need help with Nil values
> On Mon, Feb 22, 2016 at 9:15 PM, TS xx <maringa...@hotmail.com> wrote:
>
>> I expect $.value to hold Strings, but I want to be able to instantiate
>> MyClass whether I have a value already or not, and I also want to be able
>> to tell if $.value has a real String or not. Is this possible?
>
>
> You don't want Nil there; it's not the undefined value, it's a value of a
> special type. You want Str, the type object for Strings, which also serves
> as the undefined value (also true for other types). You can test it with
> `defined`.
>
> $myObject = MyClass.new(Str);
>
> then you can test $!value.defined or whatever.
>
> --
> brandon s allbery kf8nh sine nomine
> associates
> allber...@gmail.com
> ballb...@sinenomine.net
> unix, openafs, kerberos, infrastructure, xmonad
> http://sinenomine.net
>
