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error: `async` trait implementations are unsupported
--> $DIR/impl-header.rs:5:6
|
LL | impl async Fn<()> for F {}
| ^^^^^
error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
--> $DIR/impl-header.rs:5:12
|
LL | impl async Fn<()> for F {}
| ^^^^^^
|
= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0183]: manual implementations of `Fn` are experimental
--> $DIR/impl-header.rs:5:12
|
LL | impl async Fn<()> for F {}
| ^^^^^^ manual implementations of `Fn` are experimental
|
= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
error[E0277]: expected a `FnMut()` closure, found `F`
--> $DIR/impl-header.rs:5:23
|
LL | impl async Fn<()> for F {}
| ^ expected an `FnMut()` closure, found `F`
|
= help: the trait `FnMut()` is not implemented for `F`
= note: wrap the `F` in a closure with no arguments: `|| { /* code */ }`
note: required by a bound in `Fn`
--> $SRC_DIR/core/src/ops/function.rs:LL:COL
error[E0046]: not all trait items implemented, missing: `call`
--> $DIR/impl-header.rs:5:1
|
LL | impl async Fn<()> for F {}
| ^^^^^^^^^^^^^^^^^^^^^^^ missing `call` in implementation
|
= help: implement the missing item: `fn call(&self, _: ()) -> <Self as FnOnce<()>>::Output { todo!() }`
error: aborting due to 5 previous errors
Some errors have detailed explanations: E0046, E0183, E0277, E0658.
For more information about an error, try `rustc --explain E0046`.
|
