D5550: rust-cpython: bindings for MissingAncestors

[kevincox (Kevin Cox)]

kevincox added inline comments.

INLINE COMMENTS

> gracinet wrote in ancestors.rs:170
> Got this one in the wrong direction (sorry about that!) : in this case, this is a conversion from Rust, so we de have proper `size_hint()`
> Still, I'll keep in mind the question for the other direction (in which we are using `collect()` already.

That makes sense. Also if you still want to use iterators without wiring up size hints properly you could do something like:

  let v = Vector::with_capacity(hint);
  v.extend(iterators);

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D5550

To: gracinet, #hg-reviewers
Cc: yuja, durin42, kevincox, mercurial-devel