First experience and thoughts about `Pin` API

libs
19

So if we’ll get for loop integration, we will have to write code like this:

struct Foo { .. }
impl Generator for Foo { .. }

let result = for val in Pin::new(Foo::new(bar)) { .. }
// or
let result = for val in Foo::new(bar).pin() { .. }

Even though this custom generator does not do any self-referencing? Does not look that nice. :confused:

A good example where generators can result in a nicer API is chunks_exact variant which returns leftover slice instead of simply omitting it:

// `chunk` has type `&[T; 16]` and `leftover` has type `&[T]` with length < 16
let leftover = for chunk in Pin::new(slice.const_chunks::<16>()) { .. }

Looks quite clunky to me…