On Sun Apr 17 16:34:02 2016, pesc...@gmail.com wrote:
> Consider the following snippet:
> 
> 23:28 < psch> m: role Bar::Foo { }; class A { submethod BUILD { self
> does Bar::Foo } }; A.new.WHAT.say
> 23:28 <+camelia> rakudo-moar 617bb4: OUTPUT«(Foo})␤»
> 
> Clearly, A is not of type 'Foo}'. As far as I can tell
> Perl6::Metamodel::Naming is involved, although I'm not sure why this
> only happens with mixins during BUILD. I'd expect .WHAT to report
> 'A+{Bar::Foo}' instead.

Nothing to do build BUILD. It golfs to:

role Foo::Bar { }; say (42 but Foo::Bar).^shortname

And it'll be because of this overly-naive code:

https://github.com/rakudo/rakudo/blob/nom/src/Perl6/Metamodel/Naming.nqp#L6

Maybe set_name should take an optional second parameter for the short name, and 
the mixin code can set it explicitly.

/jnthn

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