in reply to [raku] what accessors are actually autogenerated for @.array attributes?

I don't know much about Raku, but the following worked for me: 
$fish.scales = ('green','blue','yellow');

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Interestingly, it also works if I declare the attribute as readonly.

See also StackOverflow.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In Section Seekers of Perl Wisdom