| error[E0277]: expected a `Fn(&isize)` closure, found `unsafe fn(isize) -> isize {square}` |
| --> $DIR/unboxed-closures-wrong-arg-type-extern-fn.rs:21:21 |
| | |
| LL | let x = call_it(&square, 22); |
| | ------- ^^^^^^^ call the function in a closure: `|| unsafe { /* code */ }` |
| | | |
| | required by a bound introduced by this call |
| | |
| = help: the trait `for<'a> Fn<(&'a isize,)>` is not implemented for fn item `unsafe fn(isize) -> isize {square}` |
| = note: unsafe function cannot be called generically without an unsafe block |
| note: required by a bound in `call_it` |
| --> $DIR/unboxed-closures-wrong-arg-type-extern-fn.rs:10:15 |
| | |
| LL | fn call_it<F: Fn(&isize) -> isize>(_: &F, _: isize) -> isize { |
| | ^^^^^^^^^^^^^^^^^^^ required by this bound in `call_it` |
| |
| error[E0277]: expected a `FnMut(&isize)` closure, found `unsafe fn(isize) -> isize {square}` |
| --> $DIR/unboxed-closures-wrong-arg-type-extern-fn.rs:26:25 |
| | |
| LL | let y = call_it_mut(&mut square, 22); |
| | ----------- ^^^^^^^^^^^ call the function in a closure: `|| unsafe { /* code */ }` |
| | | |
| | required by a bound introduced by this call |
| | |
| = help: the trait `for<'a> FnMut<(&'a isize,)>` is not implemented for fn item `unsafe fn(isize) -> isize {square}` |
| = note: unsafe function cannot be called generically without an unsafe block |
| note: required by a bound in `call_it_mut` |
| --> $DIR/unboxed-closures-wrong-arg-type-extern-fn.rs:13:19 |
| | |
| LL | fn call_it_mut<F: FnMut(&isize) -> isize>(_: &mut F, _: isize) -> isize { |
| | ^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `call_it_mut` |
| |
| error[E0277]: expected a `FnOnce(&isize)` closure, found `unsafe fn(isize) -> isize {square}` |
| --> $DIR/unboxed-closures-wrong-arg-type-extern-fn.rs:31:26 |
| | |
| LL | let z = call_it_once(square, 22); |
| | ------------ ^^^^^^ call the function in a closure: `|| unsafe { /* code */ }` |
| | | |
| | required by a bound introduced by this call |
| | |
| = help: the trait `for<'a> FnOnce<(&'a isize,)>` is not implemented for fn item `unsafe fn(isize) -> isize {square}` |
| = note: unsafe function cannot be called generically without an unsafe block |
| note: required by a bound in `call_it_once` |
| --> $DIR/unboxed-closures-wrong-arg-type-extern-fn.rs:16:20 |
| | |
| LL | fn call_it_once<F: FnOnce(&isize) -> isize>(_: F, _: isize) -> isize { |
| | ^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `call_it_once` |
| |
| error: aborting due to 3 previous errors |
| |
| For more information about this error, try `rustc --explain E0277`. |