Bug: 156526402

Clone this repo:


  1. 2960bb3 Upgrade rust/crates/pin-project to 0.4.17 by Haibo Huang · 8 days ago master
  2. 6f3e927 Import 'pin-project' package version 0.4.16 by Chih-Hung Hsieh · 13 days ago
  3. 2e1ed43 Initial empty repository by Inna Palant · 13 days ago


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A crate for safe and ergonomic pin-projection.




Add this to your Cargo.toml:

pin-project = "0.4"

The current pin-project requires Rust 1.34 or later.


pin_project attribute creates a projection struct covering all the fields.

use pin_project::pin_project;
use std::pin::Pin;

struct Struct<T, U> {
    pinned: T,
    unpinned: U,

impl<T, U> Struct<T, U> {
    fn foo(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

See API documentation for more details.

Also, there are examples and generated code of each feature in examples directory.


Licensed under either of

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.