6f662176e7
This adds the migration lint for the newly ambiguous methods `poll` and `into_future`. When these methods are used on types implementing the respective traits, it will be ambiguous in the future, which can lead to hard errors or behavior changes depending on the exact circumstances.
24 lines
730 B
Rust
24 lines
730 B
Rust
//@ revisions: e2021 e2024
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//@[e2021] edition: 2021
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//@[e2021] run-rustfix
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//@[e2024] edition: 2024
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//@[e2024] compile-flags: -Zunstable-options
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//@[e2024] check-pass
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#![deny(rust_2024_prelude_collisions)]
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trait Meow {
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fn into_future(&self) {}
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}
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impl Meow for Cat {}
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struct Cat;
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fn main() {
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// This is a false positive, but it should be rare enough to not matter, and checking whether
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// it implements the trait can have other nontrivial consequences, so it was decided to accept
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// this.
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Meow::into_future(&Cat);
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//[e2021]~^ ERROR trait method `into_future` will become ambiguous in Rust 2024
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//[e2021]~| WARN this is accepted in the current edition (Rust 2021) but is a hard error in Rust 2024!
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}
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