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// 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(())
}
|
