[swift-users] Why does RangeReplaceableCollection require an empty initialiser?

[Tino Heth]

Hi there,

> The requirement of the empty initialiser makes it impossible to have a collection conform to this protocol that needs additional data for its initialisation.
But if there is no guarantee for an empty initializer, you always need a piece of data to create an instance — and when you do heavy "metaprogramming" (generics, protocols…), it can become very hard to supply this additional data.
In those situations, it is very valuable when you can create an object out of thin air…

Tino