evalable6

query

role A { submethod BUILD (:$a) { say 'ROLE' }; }; class A { submethod BUILD(:$b) { say 'CLASS'; }; multi method new($b) { self.bless(:$b); }; multi method new ($a, $b) { self.bless(:$a, :$b) }; }; 

result

(exit code 1) 
===SORRY!=== Error while compiling /tmp/niZGaqDysX
Redeclaration of symbol 'A'
at /tmp/niZGaqDysX:1
------> d BUILD (:$a) { say 'ROLE' }; }; class A⏏ { submethod BUILD(:$b) { say 'CLASS'; }
    expecting any of:
        generic role