rust/tests/ui/rust-2021/future-prelude-collision-ma...

46 lines
832 B
Rust

//@ run-rustfix
//@ edition:2018
//@ check-pass
#![warn(rust_2021_prelude_collisions)]
#![allow(unreachable_code)]
macro_rules! foo {
() => {{
123;
S
}};
}
trait MyTry<T> {
fn try_into(self, _: u8);
}
struct S;
impl MyTry<i32> for S {
fn try_into(self, _: u8) {}
}
trait TryFromU8: Sized {
fn try_from(_: u8);
}
impl TryFromU8 for u32 {
fn try_from(_: u8) {}
}
macro_rules! bar {
() => {
u32
};
}
fn main() {
MyTry::try_into(foo!(), todo!());
//~^ WARNING trait method `try_into` will become ambiguous in Rust 2021
//~| WARNING this is accepted in the current edition
<bar!() as TryFromU8>::try_from(0);
//~^ WARNING trait-associated function `try_from` will become ambiguous in Rust 2021
//~| WARNING this is accepted in the current edition
}