rust/tests/ui/async-await/pin-sugar.rs

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2024-09-20 14:09:18 -05:00
//@ check-pass
#![feature(pin_ergonomics)]
#![allow(dead_code, incomplete_features)]
// Makes sure we can handle `&pin mut T` and `&pin const T` as sugar for `Pin<&mut T>` and
// `Pin<&T>`.
use std::pin::Pin;
struct Foo;
impl Foo {
fn baz(self: &pin mut Self) {
}
fn baz_const(self: &pin const Self) {
}
fn baz_lt<'a>(self: &'a pin mut Self) {
}
fn baz_const_lt(self: &'_ pin const Self) {
}
}
fn foo(_: &pin mut Foo) {
}
fn foo_const(x: &pin const Foo) {
}
fn bar(x: &pin mut Foo) {
foo(x);
foo(x); // for this to work we need to automatically reborrow,
// as if the user had written `foo(x.as_mut())`.
Foo::baz(x);
Foo::baz(x);
// make sure we can reborrow &mut as &.
foo_const(x);
Foo::baz_const(x);
let x: &pin const _ = Pin::new(&Foo);
foo_const(x); // make sure reborrowing from & to & works.
foo_const(x);
}
fn main() {}