29 lines
713 B
Rust
29 lines
713 B
Rust
// issue #101663
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#![feature(return_position_impl_trait_in_trait)]
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#![allow(incomplete_features)]
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use std::fmt::Display;
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trait Wf<T> {
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type Output;
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}
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struct NeedsDisplay<T: Display>(T);
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trait Uwu {
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fn nya() -> impl Wf<Vec<[u8]>>;
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//~^ ERROR the size for values of type `[u8]` cannot be known at compilation time
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fn nya2() -> impl Wf<[u8]>;
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//~^ ERROR the size for values of type `[u8]` cannot be known at compilation time
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fn nya3() -> impl Wf<(), Output = impl Wf<Vec<[u8]>>>;
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//~^ ERROR the size for values of type `[u8]` cannot be known at compilation time
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fn nya4<T>() -> impl Wf<NeedsDisplay<T>>;
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//~^ ERROR `T` doesn't implement `std::fmt::Display`
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}
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fn main() {}
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