Crate of the Week

[Yandros]

I'd like to self-nominate:

lending-iterator

• It's a "concrete / real-life" result of using the #[gat] macro^[1] to feature GATs on stable Rust (plus, internally, a pinch of ::polonius-the-crab to get polonius-like borrow-checking on stable Rust as well)

• We can thus write things like .windows_mut(), which no other "flexible iterator" crate could express yet (afaik).

• From what I've heard, writing certain parser implementations can be quite convenient with lending iterators (I'd welcome feedback from those having had the chance to experiment with it!).

---

[META]

• (If you intend to comment on any of these crates specifically, please open a dedicated thread for it, e.g., through the Reply as linked topic^[2] option of Discourse)

  demo

  

---

1. these #[gat] annotations are currently exposed and required, but they are expected to eventually smoothly disappear once generic_associated_types makes it to stable / through a Cargo feature opt-in. ↩︎

2. 
   ↩︎