// run-rustfix // edition:2018 // check-pass #![warn(rust_2021_prelude_collisions)] #![allow(dead_code)] #![allow(unused_imports)] mod m { pub trait TryIntoU32 { fn try_into(self) -> Result<u32, ()>; } impl TryIntoU32 for u8 { fn try_into(self) -> Result<u32, ()> { Ok(self as u32) } } pub trait AnotherTrick {} } mod a { use crate::m::TryIntoU32; fn main() { // In this case, we can just use `TryIntoU32` let _: u32 = TryIntoU32::try_into(3u8).unwrap(); //~^ WARNING trait method `try_into` will become ambiguous in Rust 2021 //~^^ WARNING this is accepted in the current edition } } mod b { use crate::m::AnotherTrick as TryIntoU32; use crate::m::TryIntoU32 as _; fn main() { // In this case, a `TryIntoU32::try_into` rewrite will not work, and we need to use // the path `crate::m::TryIntoU32` (with which it was imported). let _: u32 = crate::m::TryIntoU32::try_into(3u8).unwrap(); //~^ WARNING trait method `try_into` will become ambiguous in Rust 2021 //~^^ WARNING this is accepted in the current edition } } mod c { use super::m::TryIntoU32 as _; use crate::m::AnotherTrick as TryIntoU32; fn main() { // In this case, a `TryIntoU32::try_into` rewrite will not work, and we need to use // the path `super::m::TryIntoU32` (with which it was imported). let _: u32 = super::m::TryIntoU32::try_into(3u8).unwrap(); //~^ WARNING trait method `try_into` will become ambiguous in Rust 2021 //~^^ WARNING this is accepted in the current edition } } mod d { use super::m::*; fn main() { // See https://github.com/rust-lang/rust/issues/88471 let _: u32 = TryIntoU32::try_into(3u8).unwrap(); //~^ WARNING trait method `try_into` will become ambiguous in Rust 2021 //~^^ WARNING this is accepted in the current edition } } fn main() {}