mirror of https://github.com/rust-lang/rust
42 lines
807 B
Rust
42 lines
807 B
Rust
use std::fmt::Debug;
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trait Foo {
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fn foo(&self, _: &impl Debug);
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}
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impl Foo for () {
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fn foo<U: Debug>(&self, _: &U) { }
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//~^ Error method `foo` has incompatible signature for trait
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}
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trait Bar {
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fn bar<U: Debug>(&self, _: &U);
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}
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impl Bar for () {
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fn bar(&self, _: &impl Debug) { }
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//~^ Error method `bar` has incompatible signature for trait
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}
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trait Baz {
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fn baz<U: Debug, T: Debug>(&self, _: &U, _: &T);
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}
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impl Baz for () {
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fn baz<T: Debug>(&self, _: &impl Debug, _: &T) { }
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//~^ Error method `baz` has incompatible signature for trait
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}
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// With non-local trait (#49841):
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use std::hash::{Hash, Hasher};
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struct X;
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impl Hash for X {
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fn hash(&self, hasher: &mut impl Hasher) {}
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//~^ Error method `hash` has incompatible signature for trait
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}
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fn main() {}
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