Have you tried printing ^mro of $best_friend? You would be surprised! Instead,
try compiling the following:
role R1 {
method !priv { say "R1::priv" }
}
role R2 {
method !priv { say "R2::priv" }
}
class Foo does R1 does R2 {
}
Oops.... And this I consider a major problem. I as a developer must not care
about private methods of third-party modules. But I would have to! That's why I
want roles to be something more than mere collection of entitites mixed into a
class.
> On Jan 30, 2019, at 1:47 AM, yary <[email protected]> wrote:
>
> > Yet, have a look at my example with private methods
>
> All of the bug reports, code excerts use regular (public) methods. Do you
> have code to share with !private_methods and/or submethods? I just made an
> example, will be at the end of this email
>
> > If accidentally two roles declare same private method – I either must
> > reject using one of them or resolve the conflict manually ...
>
> The docs say what to do if two roles declare the same regular method. I would
> expect the same to hold for private methods, and submethods- the consuming
> class would need to define its own same-named submethod or private method,
> calling the whichever role routine(s) it needs.
>
> it sounds like you'd like to have a role be able to declare some routines
> which only other methods in the role can use- not the consuming class, or any
> other role. Turns out that private methods in roles do the trick!
>
> use v6;
>
> # Turn anything into a public entertainer
> role Diva {
> method captivate (&talent) {
> say "tais toi!";
> self.&talent;
> self!bow;
> }
>
> method !bow {
> say "<takes a bow>"
> }
> }
>
>
> # Learn to play
> role Violinist {
> method fiddle {
> say "got sheet music, got rosin...";
> self!bow;
> }
>
> method !bow {
> say "<world's most beautiful melodies>"
> }
> }
>
>
> # cute and playful
> class Puppy {
> method greet {
> say "<sniff>";
> self!bow;
> }
>
> method !bow {
> say "Bow wow wow!"
> }
> }
>
> my $best_friend=(Puppy.new but Violinist) but Diva;
> $best_friend.greet;
> $best_friend.captivate($best_friend.^lookup('fiddle'));
>
> says
> <sniff>
> Bow wow wow!
> tais toi!
> got sheet music, got rosin...
> <world's most beautiful melodies>
> <takes a bow>
>
> I'm very happy with that behavior. Would like it to be documented.
>
> (And, I'll add comments to your bug tickets now)
> -y
Best regards,
Vadim Belman
