52 lines
1.2 KiB
Rust
52 lines
1.2 KiB
Rust
// edition: 2021
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#![feature(return_position_impl_trait_in_trait, async_fn_in_trait)]
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#![allow(incomplete_features)]
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trait Uwu {
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fn owo(x: ()) -> impl Sized;
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}
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impl Uwu for () {
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fn owo(_: u8) {}
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//~^ ERROR method `owo` has an incompatible type for trait
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}
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trait AsyncUwu {
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async fn owo(x: ()) {}
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}
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impl AsyncUwu for () {
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async fn owo(_: u8) {}
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//~^ ERROR method `owo` has an incompatible type for trait
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}
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trait TooMuch {
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fn calm_down_please() -> impl Sized;
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}
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impl TooMuch for () {
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fn calm_down_please(_: (), _: (), _: ()) {}
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//~^ ERROR method `calm_down_please` has 3 parameters but the declaration in trait `TooMuch::calm_down_please` has 0
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}
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trait TooLittle {
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fn come_on_a_little_more_effort(_: (), _: (), _: ()) -> impl Sized;
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}
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impl TooLittle for () {
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fn come_on_a_little_more_effort() {}
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//~^ ERROR method `come_on_a_little_more_effort` has 0 parameters but the declaration in trait `TooLittle::come_on_a_little_more_effort` has 3
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}
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trait Lifetimes {
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fn early<'early, T>(x: &'early T) -> impl Sized;
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}
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impl Lifetimes for () {
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fn early<'late, T>(_: &'late ()) {}
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//~^ ERROR method `early` has an incompatible type for trait
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}
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fn main() {}
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