mirror of https://github.com/rust-lang/rust
20 lines
434 B
Rust
20 lines
434 B
Rust
#![feature(type_alias_impl_trait)]
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use std::fmt::Debug;
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fn main() {}
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// test that unused generic parameters are ok
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type Two<T, U> = impl Debug;
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fn two<T: Copy + Debug, U: Debug>(t: T, u: U) -> Two<T, U> {
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(t, t)
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//~^ ERROR `T` doesn't implement `Debug`
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}
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fn three<T: Copy + Debug, U: Debug>(t: T, u: U) -> Two<T, U> {
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(u, t)
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//~^ ERROR `T` doesn't implement `Debug`
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//~| ERROR `U` doesn't implement `Debug`
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}
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