tag | c91f1392e25f105147da08f017bf3b6935a7caf1 | |
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tagger | The Android Open Source Project <initial-contribution@android.com> | Wed Jan 03 15:47:26 2024 -0800 |
object | 82ee4cb33b2febb89a063a90c6cc3bdb1966b92a |
Android 14.0.0 release 20
commit | 82ee4cb33b2febb89a063a90c6cc3bdb1966b92a | [log] [tgz] |
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author | Matthew Maurer <mmaurer@google.com> | Thu Mar 09 18:06:41 2023 +0000 |
committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | Thu Mar 09 18:06:41 2023 +0000 |
tree | 63618c47b4bd4284d029fe1fcff06c0b4b6e7e00 | |
parent | f41f2cc6af28ae55dda1858914049f4d0c13ba16 [diff] | |
parent | 986eabe3b27dc4eb4c9d630a1996d53d518dc2f4 [diff] |
Make pin-project available to product and vendor am: f8587c23bb am: 2ca05f02fa am: aeb5fffb73 am: 986eabe3b2 Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pin-project/+/2476291 Change-Id: Ibad75653442d62028809fc3842ec2c70db04a7fa Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
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.