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error[E0277]: expected a `Fn(&isize)` closure, found `for<'a> extern "C" fn(&'a isize) -> isize {square}`
--> $DIR/unboxed-closures-wrong-abi.rs:20:21
|
LL | let x = call_it(&square, 22);
| ------- ^^^^^^^ expected an `Fn(&isize)` closure, found `for<'a> extern "C" fn(&'a isize) -> isize {square}`
| |
| required by a bound introduced by this call
|
= help: the trait `for<'a> Fn<(&'a isize,)>` is not implemented for fn item `for<'a> extern "C" fn(&'a isize) -> isize {square}`
note: required by a bound in `call_it`
--> $DIR/unboxed-closures-wrong-abi.rs:9:15
|
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 `for<'a> extern "C" fn(&'a isize) -> isize {square}`
--> $DIR/unboxed-closures-wrong-abi.rs:25:25
|
LL | let y = call_it_mut(&mut square, 22);
| ----------- ^^^^^^^^^^^ expected an `FnMut(&isize)` closure, found `for<'a> extern "C" fn(&'a isize) -> isize {square}`
| |
| required by a bound introduced by this call
|
= help: the trait `for<'a> FnMut<(&'a isize,)>` is not implemented for fn item `for<'a> extern "C" fn(&'a isize) -> isize {square}`
note: required by a bound in `call_it_mut`
--> $DIR/unboxed-closures-wrong-abi.rs:12:19
|
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 `for<'a> extern "C" fn(&'a isize) -> isize {square}`
--> $DIR/unboxed-closures-wrong-abi.rs:30:26
|
LL | let z = call_it_once(square, 22);
| ------------ ^^^^^^ expected an `FnOnce(&isize)` closure, found `for<'a> extern "C" fn(&'a isize) -> isize {square}`
| |
| required by a bound introduced by this call
|
= help: the trait `for<'a> FnOnce<(&'a isize,)>` is not implemented for fn item `for<'a> extern "C" fn(&'a isize) -> isize {square}`
note: required by a bound in `call_it_once`
--> $DIR/unboxed-closures-wrong-abi.rs:15:20
|
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`.
|
