tmp.raku

use v6.d;

class C {
    has $.foo;
    has $.bar;
    method m { 
        my %h = foo => 1, bar => 2;
        for self.^attributes {
            .set_value(self, %h{.name.subst(/^'$!'/, '')})
        }
        self
    }
}

dd C.new.m;

# LEAVE slurp($*PROGRAM).say;