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fe5f734e6a
rust/compiler/rustc_middle
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Guillaume Gomez fe5f734e6a
Rollup merge of #130526 - eholk:pin-reborrow, r=compiler-errors 
Begin experimental support for pin reborrowing

This commit adds basic support for reborrowing `Pin` types in argument position. At the moment it only supports reborrowing `Pin<&mut T>` as `Pin<&mut T>` by inserting a call to `Pin::as_mut()`, and only in argument position (not as the receiver in a method call).

This PR makes the following example compile:

```rust
#![feature(pin_ergonomics)]

fn foo(_: Pin<&mut Foo>) {
}

fn bar(mut x: Pin<&mut Foo>) {
    foo(x);
    foo(x);
}
```

Previously, you would have had to write `bar` as:

```rust
fn bar(mut x: Pin<&mut Foo>) {
    foo(x.as_mut());
    foo(x);
}
```

Tracking:

- #130494

r? `@compiler-errors`
2024-09-20 19:46:38 +02:00
..
src Rollup merge of #130526 - eholk:pin-reborrow, r=compiler-errors 2024-09-20 19:46:38 +02:00
Cargo.toml disable size asserts in the compiler when randomizing layouts 2024-08-31 23:56:45 +02:00
messages.ftl Re-implement a type-size based limit 2024-07-02 15:48:48 -04:00
README.md

README.md

For more information about how rustc works, see the rustc dev guide.