pin-project 0.4.30

A crate for safe and ergonomic pin-projection.


crates-badge docs-badge license-badge rustc-badge

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 projection types covering all the fields of struct or enum.

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

struct Struct<T, U> {
    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

See documentation for more details, and see examples directory for more examples and generated code.

Related Projects

  • pin-project-lite: A lightweight version of pin-project written with declarative macros.


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.