mirror of
https://github.com/rust-lang/rust
synced 2024-10-14 04:23:37 +00:00
e6bd6c2044
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) { | ++++++ ```
20 lines
783 B
Plaintext
20 lines
783 B
Plaintext
error[E0277]: expected a `Fn(isize)` closure, found `S`
|
|
--> $DIR/unboxed-closures-fnmut-as-fn.rs:27:21
|
|
|
|
|
LL | let x = call_it(&S, 22);
|
|
| ------- ^^ expected an `Fn(isize)` closure, found `S`
|
|
| |
|
|
| required by a bound introduced by this call
|
|
|
|
|
= help: the trait `Fn(isize)` is not implemented for `S`
|
|
= note: `S` implements `FnMut`, but it must implement `Fn`, which is more general
|
|
note: required by a bound in `call_it`
|
|
--> $DIR/unboxed-closures-fnmut-as-fn.rs:22:14
|
|
|
|
|
LL | fn call_it<F:Fn(isize)->isize>(f: &F, x: isize) -> isize {
|
|
| ^^^^^^^^^^^^^^^^ required by this bound in `call_it`
|
|
|
|
error: aborting due to 1 previous error
|
|
|
|
For more information about this error, try `rustc --explain E0277`.
|