| error[E0277]: the size for values of type `(dyn FnOnce() + 'static)` cannot be known at compilation time |
| --> $DIR/feature-gate-unsized_locals.rs:1:9 |
| | |
| LL | fn f(f: dyn FnOnce()) {} |
| | ^^^^^^^^^^^^ doesn't have a size known at compile-time |
| | |
| = help: the trait `Sized` is not implemented for `(dyn FnOnce() + 'static)` |
| = help: unsized fn params are gated as an unstable feature |
| help: you can use `impl Trait` as the argument type |
| | |
| LL - fn f(f: dyn FnOnce()) {} |
| LL + fn f(f: impl FnOnce()) {} |
| | |
| help: function arguments must have a statically known size, borrowed types always have a known size |
| | |
| LL | fn f(f: &dyn FnOnce()) {} |
| | + |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0277`. |
