error[E0053]: method `owo` has an incompatible type for trait --> $DIR/method-signature-matches.rs:11:15 | LL | fn owo(_: u8) {} | ^^ | | | expected `()`, found `u8` | help: change the parameter type to match the trait: `()` | note: type in trait --> $DIR/method-signature-matches.rs:7:15 | LL | fn owo(x: ()) -> impl Sized; | ^^ = note: expected signature `fn(())` found signature `fn(u8)` error[E0053]: method `owo` has an incompatible type for trait --> $DIR/method-signature-matches.rs:20:21 | LL | async fn owo(_: u8) {} | ^^ | | | expected `()`, found `u8` | help: change the parameter type to match the trait: `()` | note: type in trait --> $DIR/method-signature-matches.rs:16:21 | LL | async fn owo(x: ()) {} | ^^ = note: expected signature `fn(()) -> _` found signature `fn(u8) -> _` error[E0050]: method `calm_down_please` has 3 parameters but the declaration in trait `TooMuch::calm_down_please` has 0 --> $DIR/method-signature-matches.rs:29:28 | LL | fn calm_down_please() -> impl Sized; | ------------------------------------ trait requires 0 parameters ... LL | fn calm_down_please(_: (), _: (), _: ()) {} | ^^^^^^^^^^^^^^^^ expected 0 parameters, found 3 error[E0050]: method `come_on_a_little_more_effort` has 0 parameters but the declaration in trait `TooLittle::come_on_a_little_more_effort` has 3 --> $DIR/method-signature-matches.rs:38:5 | LL | fn come_on_a_little_more_effort(_: (), _: (), _: ()) -> impl Sized; | ---------------- trait requires 3 parameters ... LL | fn come_on_a_little_more_effort() {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected 3 parameters, found 0 error[E0053]: method `early` has an incompatible type for trait --> $DIR/method-signature-matches.rs:47:27 | LL | fn early<'late, T>(_: &'late ()) {} | - ^^^^^^^^^ | | | | | expected type parameter `T`, found `()` | | help: change the parameter type to match the trait: `&'early T` | this type parameter | note: type in trait --> $DIR/method-signature-matches.rs:43:28 | LL | fn early<'early, T>(x: &'early T) -> impl Sized; | ^^^^^^^^^ = note: expected signature `fn(&'early T)` found signature `fn(&())` error: aborting due to 5 previous errors Some errors have detailed explanations: E0050, E0053. For more information about an error, try `rustc --explain E0050`.