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