jj/lib
Martin von Zweigbergk 01ac97f999 merge: implement Iterator and FromIterator
Implementing `Iterator` and `FromIterator` on `Merge<T>` provides much
more flexibility than the current `map()`, `try_map()`, etc.

`Merge::from_iter()` wouldn't have a way of failing if it's given an
unexpected (even) number of items. I would be fine with having it
panic, but we can't even usefully do that, because
e.g. `Option::from_iter()` will pass us an iterator ends early if the
input interator ends early. For example,
`Merge::resolved(None).iter().collect()` would call
`Merge::from_iter()` with an empty iterator (first item `None`). So, I
instead created a `MergeBuilder` type implementing `FromIterator`, and
let `MergeBuilder::build()` panic if there were an even number of
items.

I re-implemented some existing `Merge` methods using the new
facilities in this commit. Maybe we should remove some of the methods.
2023-08-14 08:44:38 -07:00
..
benches
gen-protos
src merge: implement Iterator and FromIterator 2023-08-14 08:44:38 -07:00
tests
testutils
Cargo.toml