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) { | ++++++ ```
109 lines
4.5 KiB
Plaintext
109 lines
4.5 KiB
Plaintext
error[E0277]: expected a `Fn()` closure, found `fn() {foo}`
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--> $DIR/fn-traits.rs:24:10
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LL | call(foo);
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| ---- ^^^ expected an `Fn()` closure, found `fn() {foo}`
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| required by a bound introduced by this call
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= help: the trait `Fn()` is not implemented for fn item `fn() {foo}`
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= note: wrap the `fn() {foo}` in a closure with no arguments: `|| { /* code */ }`
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= note: `#[target_feature]` functions do not implement the `Fn` traits
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note: required by a bound in `call`
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--> $DIR/fn-traits.rs:11:17
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LL | fn call(f: impl Fn()) {
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| ^^^^ required by this bound in `call`
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error[E0277]: expected a `FnMut()` closure, found `fn() {foo}`
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--> $DIR/fn-traits.rs:25:14
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LL | call_mut(foo);
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| -------- ^^^ expected an `FnMut()` closure, found `fn() {foo}`
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| |
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| required by a bound introduced by this call
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= help: the trait `FnMut()` is not implemented for fn item `fn() {foo}`
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= note: wrap the `fn() {foo}` in a closure with no arguments: `|| { /* code */ }`
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= note: `#[target_feature]` functions do not implement the `Fn` traits
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note: required by a bound in `call_mut`
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--> $DIR/fn-traits.rs:15:25
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LL | fn call_mut(mut f: impl FnMut()) {
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| ^^^^^^^ required by this bound in `call_mut`
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error[E0277]: expected a `FnOnce()` closure, found `fn() {foo}`
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--> $DIR/fn-traits.rs:26:15
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LL | call_once(foo);
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| --------- ^^^ expected an `FnOnce()` closure, found `fn() {foo}`
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| |
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| required by a bound introduced by this call
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= help: the trait `FnOnce()` is not implemented for fn item `fn() {foo}`
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= note: wrap the `fn() {foo}` in a closure with no arguments: `|| { /* code */ }`
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= note: `#[target_feature]` functions do not implement the `Fn` traits
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note: required by a bound in `call_once`
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--> $DIR/fn-traits.rs:19:22
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LL | fn call_once(f: impl FnOnce()) {
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| ^^^^^^^^ required by this bound in `call_once`
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error[E0277]: expected a `Fn()` closure, found `unsafe fn() {foo_unsafe}`
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--> $DIR/fn-traits.rs:28:10
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LL | call(foo_unsafe);
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| ---- ^^^^^^^^^^ call the function in a closure: `|| unsafe { /* code */ }`
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| required by a bound introduced by this call
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= help: the trait `Fn()` is not implemented for fn item `unsafe fn() {foo_unsafe}`
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= note: unsafe function cannot be called generically without an unsafe block
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= note: wrap the `unsafe fn() {foo_unsafe}` in a closure with no arguments: `|| { /* code */ }`
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= note: `#[target_feature]` functions do not implement the `Fn` traits
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note: required by a bound in `call`
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--> $DIR/fn-traits.rs:11:17
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LL | fn call(f: impl Fn()) {
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| ^^^^ required by this bound in `call`
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error[E0277]: expected a `FnMut()` closure, found `unsafe fn() {foo_unsafe}`
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--> $DIR/fn-traits.rs:30:14
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LL | call_mut(foo_unsafe);
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| -------- ^^^^^^^^^^ call the function in a closure: `|| unsafe { /* code */ }`
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| required by a bound introduced by this call
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= help: the trait `FnMut()` is not implemented for fn item `unsafe fn() {foo_unsafe}`
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= note: unsafe function cannot be called generically without an unsafe block
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= note: wrap the `unsafe fn() {foo_unsafe}` in a closure with no arguments: `|| { /* code */ }`
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= note: `#[target_feature]` functions do not implement the `Fn` traits
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note: required by a bound in `call_mut`
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--> $DIR/fn-traits.rs:15:25
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LL | fn call_mut(mut f: impl FnMut()) {
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| ^^^^^^^ required by this bound in `call_mut`
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error[E0277]: expected a `FnOnce()` closure, found `unsafe fn() {foo_unsafe}`
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--> $DIR/fn-traits.rs:32:15
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LL | call_once(foo_unsafe);
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| --------- ^^^^^^^^^^ call the function in a closure: `|| unsafe { /* code */ }`
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| required by a bound introduced by this call
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= help: the trait `FnOnce()` is not implemented for fn item `unsafe fn() {foo_unsafe}`
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= note: unsafe function cannot be called generically without an unsafe block
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= note: wrap the `unsafe fn() {foo_unsafe}` in a closure with no arguments: `|| { /* code */ }`
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= note: `#[target_feature]` functions do not implement the `Fn` traits
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note: required by a bound in `call_once`
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--> $DIR/fn-traits.rs:19:22
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LL | fn call_once(f: impl FnOnce()) {
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| ^^^^^^^^ required by this bound in `call_once`
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error: aborting due to 6 previous errors
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For more information about this error, try `rustc --explain E0277`.
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