Hi Liz, thanks for your reply.
Can I call the method from static context?
I mean: MyClass.FOO
> Subject: Re: Constants as members of a class
> From: l...@dijkmat.nl
> Date: Fri, 18 Dec 2015 10:23:11 +0100
> To: perl6-us...@perl.org
>
>
> > On 18 Dec 2015, at 03:46, TS xx <maringa...@hotmail.com> wrote:
> >
> > Hello dear perl6 users,
> >
> > I was in the need of declaring a member variable as a constant integer.
> > After many syntax tryouts I came to this one:
> >
> > class MyClass {
> > has int $.myConst;
> >
> > method new () {
> > return self.bless();
> > }
> >
> > submethod BUILD () {
> > constant $!myConst = 1;
> > }
> >
> > method showMyConst () {
> > print $!myConst;
> > }
> > }
> >
> > But I'm getting the followinf error message: "Twigil-Variable constants not
> > yet implemented. Sorry."
> >
> > The only place in the docs where I have found any reference to constants is
> > in here: https://doc.perl6.org/language/variables#The_%3F_Twigil
> > But it's not what I am looking for :/
> >
> > So my questions are:
> > Is the syntax right and the thing isn't implemented yet?
> > Is the syntax (or the full concept) wrong?
> > Do I have and old interpreter (This is perl6 version 2015.02 built on
> > MoarVM version 2015.02)?
>
> Yes, that is ancient in rakudo years :-)
>
> The question you should ask you: is the constant different for each
> instantiated object or not.
>
> If not, and you only need it inside of your class, you can just make it a
> constant in the mainline of the class:
>
> class MyClass {
> constant FOO = 42;
> …
> }
>
> If you need to expose a method returning such a constant:
>
> class MyClass {
> method FOO { 42 }
> …
> }
>
> Otherwise, you probably just need to add an attribute.
>
>
>
> Liz
