rust/tests/ui/rust-2024/prelude-migration/into-future-not-into-future.rs

24 lines
724 B
Rust

//@ revisions: e2021 e2024
//@[e2021] edition: 2021
//@[e2021] run-rustfix
//@[e2024] edition: 2024
//@[e2024] compile-flags: -Zunstable-options
//@[e2024] check-pass
#![deny(rust_2024_prelude_collisions)]
trait Meow {
fn into_future(&self) {}
}
impl Meow for Cat {}
struct Cat;
fn main() {
// This is a false positive, but it should be rare enough to not matter, and checking whether
// it implements the trait can have other nontrivial consequences, so it was decided to accept
// this.
Cat.into_future();
//[e2021]~^ ERROR trait method `into_future` will become ambiguous in Rust 2024
//[e2021]~| WARN this is accepted in the current edition (Rust 2021) but is a hard error in Rust 2024!
}