Thanks for all the answers. This will get me going.
I was unaware of the ' Hash[Int, Str]' type of declarative syntax.
I knew Hash[Str] was a thing but was unaware of the '[Int,Str]' type of
syntax.
Thanks for the insight!
On Sat, Feb 1, 2020 at 11:16 AM Elizabeth Mattijsen <l...@dijkmat.nl> wrote:
> subset PhoneNumber of Int where *.chars == 9; # or any other
> constraint
> constant PhoneBook = Hash[PhoneNumber, Str]; # no need to make a
> class, a type suffices
>
> my %pb is PhoneBook = foo => 123456789;
> dd %pb; # (my PhoneNumber %{Str} = :foo(123456789))
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