diff options
Diffstat (limited to 'tests/ui/rust-2021/future-prelude-collision-imported.rs')
-rw-r--r-- | tests/ui/rust-2021/future-prelude-collision-imported.rs | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/tests/ui/rust-2021/future-prelude-collision-imported.rs b/tests/ui/rust-2021/future-prelude-collision-imported.rs new file mode 100644 index 000000000..cdffcaf75 --- /dev/null +++ b/tests/ui/rust-2021/future-prelude-collision-imported.rs @@ -0,0 +1,70 @@ +// 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 = 3u8.try_into().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 = 3u8.try_into().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 = 3u8.try_into().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 = 3u8.try_into().unwrap(); + //~^ WARNING trait method `try_into` will become ambiguous in Rust 2021 + //~^^ WARNING this is accepted in the current edition + } +} + +fn main() {} |