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1d52972dd8
Use parenthetical notation for `Fn` traits Always use the `Fn(T) -> R` format when printing closure traits instead of `Fn<(T,), Output = R>`. Address #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) { | ++++++ ```
49 lines
1.6 KiB
Plaintext
49 lines
1.6 KiB
Plaintext
error[E0407]: method `from` is not a member of trait `Fn`
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--> $DIR/issue-87558.rs:8:5
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LL | fn from() {}
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| ^^^^^^^^^^^^ not a member of trait `Fn`
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error[E0183]: manual implementations of `Fn` are experimental
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--> $DIR/issue-87558.rs:3:6
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LL | impl Fn(&isize) for Error {
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| ^^^^^^^^^^ manual implementations of `Fn` are experimental
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= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
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error[E0229]: associated item constraints are not allowed here
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--> $DIR/issue-87558.rs:3:6
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LL | impl Fn(&isize) for Error {
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| ^^^^^^^^^^ associated item constraint not allowed here
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help: parenthesized trait syntax expands to `Fn<(&isize,), Output=()>`
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--> $DIR/issue-87558.rs:3:6
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LL | impl Fn(&isize) for Error {
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| ^^^^^^^^^^
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error[E0277]: expected a `FnMut(&isize)` closure, found `Error`
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--> $DIR/issue-87558.rs:3:21
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LL | impl Fn(&isize) for Error {
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| ^^^^^ expected an `FnMut(&isize)` closure, found `Error`
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= help: the trait `FnMut(&isize)` is not implemented for `Error`
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note: required by a bound in `Fn`
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--> $SRC_DIR/core/src/ops/function.rs:LL:COL
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error[E0046]: not all trait items implemented, missing: `call`
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--> $DIR/issue-87558.rs:3:1
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LL | impl Fn(&isize) for Error {
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| ^^^^^^^^^^^^^^^^^^^^^^^^^ missing `call` in implementation
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= help: implement the missing item: `fn call(&self, _: (&isize,)) -> <Self as FnOnce<(&isize,)>>::Output { todo!() }`
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error: aborting due to 5 previous errors
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Some errors have detailed explanations: E0046, E0183, E0229, E0277, E0407.
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For more information about an error, try `rustc --explain E0046`.
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