mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-14 09:36:06 +00:00
29 lines
960 B
Rust
29 lines
960 B
Rust
// See https://github.com/rust-lang/rust/issues/88442
|
|
// run-rustfix
|
|
// edition:2018
|
|
// check-pass
|
|
#![allow(unused)]
|
|
#![warn(rust_2021_prelude_collisions)]
|
|
|
|
trait AnnotatableTryInto {
|
|
fn try_into<T>(self) -> Result<T, Self::Error>
|
|
where Self: std::convert::TryInto<T> {
|
|
std::convert::TryInto::try_into(self)
|
|
}
|
|
}
|
|
|
|
impl<T> AnnotatableTryInto for T where T: From<u8> {}
|
|
|
|
fn main() -> Result<(), &'static str> {
|
|
let x: u64 = 1;
|
|
AnnotatableTryInto::try_into::<usize>(x).or(Err("foo"))?.checked_sub(1);
|
|
//~^ WARNING trait method `try_into` will become ambiguous in Rust 2021
|
|
//~| WARNING this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
|
|
|
|
AnnotatableTryInto::try_into::<usize>(x).or(Err("foo"))?;
|
|
//~^ WARNING trait method `try_into` will become ambiguous in Rust 2021
|
|
//~| WARNING this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
|
|
|
|
Ok(())
|
|
}
|