22 lines
509 B
Rust
22 lines
509 B
Rust
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// edition:2018
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#![feature(async_fn_in_trait)]
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#![feature(min_specialization)]
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struct MyStruct;
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trait MyTrait<T> {
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async fn foo(_: T) -> &'static str;
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}
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impl<T> MyTrait<T> for MyStruct {}
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//~^ ERROR: not all trait items implemented, missing: `foo` [E0046]
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impl MyTrait<i32> for MyStruct {
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async fn foo(_: i32) -> &'static str {}
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//~^ ERROR: `foo` specializes an item from a parent `impl`, but that item is not marked `default` [E0520]
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//~| ERROR: mismatched types [E0308]
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}
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fn main() {}
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