37 lines
743 B
Rust
37 lines
743 B
Rust
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#![feature(return_position_impl_trait_in_trait, async_fn_in_trait)]
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#![deny(refining_impl_trait)]
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trait Foo {
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fn bar() -> impl Sized;
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}
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struct A;
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impl Foo for A {
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fn bar() -> impl Copy {}
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//~^ ERROR impl method signature does not match trait method signature
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}
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struct B;
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impl Foo for B {
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fn bar() {}
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//~^ ERROR impl method signature does not match trait method signature
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}
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struct C;
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impl Foo for C {
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fn bar() -> () {}
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//~^ ERROR impl method signature does not match trait method signature
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}
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trait Late {
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fn bar<'a>(&'a self) -> impl Sized + 'a;
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}
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struct D;
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impl Late for D {
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fn bar(&self) -> impl Copy + '_ {}
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//~^ ERROR impl method signature does not match trait method signature
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}
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fn main() {}
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