Lists with elements of a certain type

[cooper]

I want to be able to do

$nums = List<Num>()

where

$nums.push("a string")

would fail.

If we had type-specific lists, we might be able to eliminate sets entirely. Which would be good because I don't like them anymore. Too much conversion between lists and sets.

To make this possible, we need the equivalent of class List <T?> in pure Perl. The Perl API does not offer a way to do this yet.