Why doesn't eg `extension Array<Int> { ... }` compile even though using a typealias does?

[hborla (Holly Borla)]

@Slava_Pestov

It just needs a proposal.

Here you go!

[Pitch] Extensions on bound generic types

Hello, Swift Evolution! I've been working on a pitch for enabling extensions of bound generic types using angle-bracket syntax, e.g. extension Array<String> {}. This feature was subsetted out of the original pitch for SE-0346. I've copied the current proposal draft below. Please let me know your questions, thoughts, and other constructive feedback! -Holly [Pitch] Extensions on bound generic types Proposal: SE-NNNN Authors: Holly Borla Review Manager: TBD Status: Awaiting implementation I…