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Always use the `Fn(T) -> R` format when printing closure traits instead of `Fn<(T,), Output = R>`. Fix #67100: ``` error[E0277]: expected a `Fn()` closure, found `F` --> file.rs:6:13 | 6 | call_fn(f) | ------- ^ expected an `Fn()` closure, found `F` | | | required by a bound introduced by this call | = note: wrap the `F` in a closure with no arguments: `|| { /* code */ }` note: required by a bound in `call_fn` --> file.rs:1:15 | 1 | fn call_fn<F: Fn() -> ()>(f: &F) { | ^^^^^^^^^^ required by this bound in `call_fn` help: consider further restricting this bound | 5 | fn call_any<F: std::any::Any + Fn()>(f: &F) { | ++++++ ```
14 lines
508 B
Plaintext
14 lines
508 B
Plaintext
error[E0277]: expected a `Fn()` closure, found `()`
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--> $DIR/issue-22034.rs:4:16
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LL | &mut *(ptr as *mut dyn Fn())
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| ^^^ expected an `Fn()` closure, found `()`
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= help: the trait `Fn()` is not implemented for `()`
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= note: wrap the `()` in a closure with no arguments: `|| { /* code */ }`
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= note: required for the cast from `*mut ()` to `*mut dyn Fn()`
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0277`.
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