evalable6

query

class A { has $.a; submethod BUILD (:$!a($a)) { }; multi method new (Int $a) { self.bless(:$a) }; }; my $a = A.new('aa');

result

(exit code 1) 
===SORRY!=== Error while compiling /tmp/BSVefKAlJ7
Shape declaration with () is reserved;
  please use whitespace if you meant a subsignature for unpacking,
  or use the :() form if you meant to add signature info to the function's type
at /tmp/BSVefKAlJ7:1
------> class A { has $.a; submethod BUILD (:$!a⏏($a)) { }; multi method new (Int $a) { s
    expecting any of:
        shape declaration