[Second review] SE-0453: Vector, a fixed size array

[lorentey (Karoy Lorentey)]

@tera

Ah, ok, I thought that the-type-being-discussed is the thing I want (e.g. to store 1024 samples in a realtime audio IO callback and do further processing on those), but it turns out it's only a "foundation" type to get to the type I want at some later stage... ok.

To reiterate, InlineArray is not going to be built on top of Vector, nor vice versa. These are independent constructs, each manually built from scratch using separate compiler builtins.

(It is not my goal for Swift to provide a public tool to build custom Inline* types from scratch; although if we're lucky, we may well end up with a usable-but-clumsy construct, in the same sort of role as ManagedBuffer is for heap allocated CoW types.)