| commit | 23166d66dc01778780a8d46bd0bc4ebf2033f2ef | [log] [tgz] |
|---|---|---|
| author | David LeGare <legare@google.com> | Wed Mar 02 22:09:35 2022 +0000 |
| committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | Wed Mar 02 22:09:35 2022 +0000 |
| tree | 80c46c7f97eb0158db00b2c4710dd54073c36733 | |
| parent | 410b9e3b15bab1e68feb13f22a5240053b1363c5 [diff] | |
| parent | 365fe11dc7cf47ae04d945af513246d19dfc00e8 [diff] |
Update pin-project to 1.0.10 am: 8915193b0d am: ac81d17ea0 am: 365fe11dc7 Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pin-project/+/2005953 Change-Id: I0d91ffa6b5ffd8ec63d5dd3636e38d577cc847e0
A crate for safe and ergonomic pin-projection.
Add this to your Cargo.toml:
[dependencies] pin-project = "1"
Compiler support: requires rustc 1.37+
#[pin_project] attribute creates projection types covering all the fields of struct or enum.
use pin_project::pin_project; use std::pin::Pin; #[pin_project] struct Struct<T, U> { #[pin] pinned: T, unpinned: U, } impl<T, U> Struct<T, U> { fn method(self: Pin<&mut Self>) { let this = self.project(); let _: Pin<&mut T> = this.pinned; // Pinned reference to the field let _: &mut U = this.unpinned; // Normal reference to the field } }
code like this will be generated
To use #[pin_project] on enums, you need to name the projection type returned from the method.
use pin_project::pin_project; use std::pin::Pin; #[pin_project(project = EnumProj)] enum Enum<T, U> { Pinned(#[pin] T), Unpinned(U), } impl<T, U> Enum<T, U> { fn method(self: Pin<&mut Self>) { match self.project() { EnumProj::Pinned(x) => { let _: Pin<&mut T> = x; } EnumProj::Unpinned(y) => { let _: &mut U = y; } } } }
code like this will be generated
See documentation for more details, and see examples directory for more examples and generated code.
Licensed under either of Apache License, Version 2.0 or MIT license at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.
