60 lines
1.4 KiB
Rust
60 lines
1.4 KiB
Rust
// edition:2021
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use core::marker::PhantomPinned;
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use core::mem::{drop as stuff, transmute};
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use core::pin::{Pin, pin};
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#[test]
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fn basic() {
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let it: Pin<&mut PhantomPinned> = pin!(PhantomPinned);
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stuff(it);
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}
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#[test]
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fn extension_works_through_block() {
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let it: Pin<&mut PhantomPinned> = { pin!(PhantomPinned) };
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stuff(it);
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}
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#[test]
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fn extension_works_through_unsafe_block() {
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// "retro-type-inference" works as well.
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let it: Pin<&mut PhantomPinned> = unsafe { pin!(transmute(())) };
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stuff(it);
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}
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#[test]
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fn unsize_coercion() {
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let slice: Pin<&mut [PhantomPinned]> = pin!([PhantomPinned; 2]);
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stuff(slice);
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let dyn_obj: Pin<&mut dyn Send> = pin!([PhantomPinned; 2]);
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stuff(dyn_obj);
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}
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#[test]
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fn rust_2024_expr() {
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// Check that we accept a Rust 2024 $expr.
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std::pin::pin!(const { 1 });
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}
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#[test]
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#[cfg(not(bootstrap))]
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fn temp_lifetime() {
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// Check that temporary lifetimes work as in Rust 2021.
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// Regression test for https://github.com/rust-lang/rust/issues/138596
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match std::pin::pin!(foo(&mut 0)) {
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_ => {}
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}
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async fn foo(_: &mut usize) {}
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}
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#[test]
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fn transitive_extension() {
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async fn temporary() {}
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// `pin!` witnessed in the wild being used like this, even if it yields
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// a `Pin<&mut &mut impl Unpin>`; it does work because `pin!`
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// happens to transitively extend the lifespan of `temporary()`.
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let p = pin!(&mut temporary());
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let _use = p;
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}
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