177: implement DoubleEndedStream r=yoshuawuyts a=yoshuawuyts
Ref #129. This is the most basic version of the `DoubleEndedStream` trait. Because there is no counterpart in `futures-rs` we allow this to be implementable (not sure if we should though?).
This is not a high-priority trait to implement, with probably the most useful addition being the blanket impl over [`std::iter::Fuse`](https://doc.rust-lang.org/std/iter/struct.Fuse.html) (where we should have a `Fuse` counterpart for `Stream` also).
So I'm taking this one step at the time, and this PR introduces just the bare minimum to get things working. Thanks!
r? @stjepang @taiki-e
## Refs
- https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html
- #129
Co-authored-by: Yoshua Wuyts <yoshuawuyts@gmail.com>
163: adds stream::filter_map combinator r=yoshuawuyts a=montekki
Implements a `flat_map` combinator. Currently the same about `ret!` as in #162 .
Also the naming should probably be `FilterMapStream`, but in that case `Take` stream should also change it's name i guess.
Stdlib: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.flat_map
Ref: #129
Co-authored-by: Fedor Sakharov <fedor.sakharov@gmail.com>
* Add future::poll_fn
* Replace all uses of poll_fn with the new one
* Remove some uses of futures
* Simplify ReadDir and DirEntry
* Remove some use of futures from File
* Use futures subcrates
* Fix imports in docs
* Remove futures-util dependency
* Remove futures-executor-preview
* Refactor
* Require more features in the futures-preview crate
