tests/ui/pin-ergonomics/borrow.rs


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//@ check-pass
#![feature(pin_ergonomics)]
#![allow(dead_code, incomplete_features)]

// Makes sure we can handle `&pin mut place` and `&pin const place` as sugar for
// `std::pin::pin!(place)` and `Pin::new(&place)`.

use std::pin::Pin;

struct Foo;

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

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

fn bar() {
    let mut x: Pin<&mut _> = &pin mut Foo;
    foo_pin_mut(x.as_mut());
    foo_pin_mut(x.as_mut());
    foo_pin_ref(x);

    let x: Pin<&_> = &pin const Foo;

    foo_pin_ref(x);
    foo_pin_ref(x);
}

fn baz(mut x: Foo, y: Foo) {
    let _x = &pin mut x;
    let _x = x; // ok because `Foo: Unpin` and thus `&pin mut x` doesn't move `x`

    let _y = &pin const y;
    let _y = y; // ok because `&pin const y` dosn't move `y`
}

fn main() {}