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|
error[E0277]: expected a `Fn()` closure, found `unsafe fn() -> i32`
--> $DIR/fn-trait.rs:20:16
|
LL | require_fn(f as unsafe fn() -> i32);
| ---------- ^^^^^^^^^^^^^^^^^^^^^^^ call the function in a closure: `|| unsafe { /* code */ }`
| |
| required by a bound introduced by this call
|
= help: the trait `Fn()` is not implemented for `unsafe fn() -> i32`
= note: unsafe function cannot be called generically without an unsafe block
= note: wrap the `unsafe fn() -> i32` in a closure with no arguments: `|| { /* code */ }`
note: required by a bound in `require_fn`
--> $DIR/fn-trait.rs:3:23
|
LL | fn require_fn(_: impl Fn() -> i32) {}
| ^^^^^^^^^^^ required by this bound in `require_fn`
error[E0277]: expected a `Fn()` closure, found `extern "C" fn() -> i32 {g}`
--> $DIR/fn-trait.rs:22:16
|
LL | require_fn(g);
| ---------- ^ expected an `Fn()` closure, found `extern "C" fn() -> i32 {g}`
| |
| required by a bound introduced by this call
|
= help: the trait `Fn()` is not implemented for fn item `extern "C" fn() -> i32 {g}`
= note: wrap the `extern "C" fn() -> i32 {g}` in a closure with no arguments: `|| { /* code */ }`
note: required by a bound in `require_fn`
--> $DIR/fn-trait.rs:3:23
|
LL | fn require_fn(_: impl Fn() -> i32) {}
| ^^^^^^^^^^^ required by this bound in `require_fn`
error[E0277]: expected a `Fn()` closure, found `extern "C" fn() -> i32`
--> $DIR/fn-trait.rs:24:16
|
LL | require_fn(g as extern "C" fn() -> i32);
| ---------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected an `Fn()` closure, found `extern "C" fn() -> i32`
| |
| required by a bound introduced by this call
|
= help: the trait `Fn()` is not implemented for `extern "C" fn() -> i32`
= note: wrap the `extern "C" fn() -> i32` in a closure with no arguments: `|| { /* code */ }`
note: required by a bound in `require_fn`
--> $DIR/fn-trait.rs:3:23
|
LL | fn require_fn(_: impl Fn() -> i32) {}
| ^^^^^^^^^^^ required by this bound in `require_fn`
error[E0277]: expected a `Fn()` closure, found `unsafe fn() -> i32 {h}`
--> $DIR/fn-trait.rs:26:16
|
LL | require_fn(h);
| ---------- ^ call the function in a closure: `|| unsafe { /* code */ }`
| |
| required by a bound introduced by this call
|
= help: the trait `Fn()` is not implemented for fn item `unsafe fn() -> i32 {h}`
= note: unsafe function cannot be called generically without an unsafe block
= note: wrap the `unsafe fn() -> i32 {h}` in a closure with no arguments: `|| { /* code */ }`
note: required by a bound in `require_fn`
--> $DIR/fn-trait.rs:3:23
|
LL | fn require_fn(_: impl Fn() -> i32) {}
| ^^^^^^^^^^^ required by this bound in `require_fn`
error: aborting due to 4 previous errors
For more information about this error, try `rustc --explain E0277`.
|
