| error[E0277]: expected a `std::ops::Fn<()>` closure, found `extern "C" fn() {f}` |
| --> $DIR/extern-wrong-value-type.rs:9:11 |
| | |
| LL | fn is_fn<F>(_: F) where F: Fn() {} |
| | ---- required by this bound in `is_fn` |
| ... |
| LL | is_fn(f); |
| | ^ expected an `Fn<()>` closure, found `extern "C" fn() {f}` |
| | |
| = help: the trait `std::ops::Fn<()>` is not implemented for `extern "C" fn() {f}` |
| = note: wrap the `extern "C" fn() {f}` in a closure with no arguments: `|| { /* code */ } |
| |
| error: aborting due to previous error |
| |
| For more information about this error, try `rustc --explain E0277`. |
