mirror of
https://github.com/rust-lang/rust.git
synced 2025-11-03 22:49:17 +00:00
29 lines
925 B
Rust
29 lines
925 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;
|
|
x.try_into::<usize>().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!
|
|
|
|
x.try_into::<usize>().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(())
|
|
}
|