| error[E0277]: the size for values of type `dyn for<'a> Fn(&'a isize) -> isize` cannot be known at compilation time |
| --> $DIR/issue-18919.rs:3:15 |
| | |
| LL | fn ho_func(f: Option<FuncType>) { |
| | ^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time |
| | |
| = help: the trait `Sized` is not implemented for `dyn for<'a> Fn(&'a isize) -> isize` |
| note: required by an implicit `Sized` bound in `Option` |
| --> $DIR/issue-18919.rs:7:13 |
| | |
| LL | enum Option<T> { |
| | ^ required by the implicit `Sized` requirement on this type parameter in `Option` |
| help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>` |
| --> $DIR/issue-18919.rs:7:13 |
| | |
| LL | enum Option<T> { |
| | ^ this could be changed to `T: ?Sized`... |
| LL | Some(T), |
| | - ...if indirection were used here: `Box<T>` |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0277`. |
