| error[E0277]: the size for values of type `str` cannot be known at compilation time |
| --> $DIR/union-unsized.rs:2:8 |
| | |
| LL | a: str, |
| | ^^^ doesn't have a size known at compile-time |
| | |
| = help: the trait `Sized` is not implemented for `str` |
| = note: no field of a union may have a dynamically sized type |
| = help: change the field's type to have a statically known size |
| help: borrowed types always have a statically known size |
| | |
| LL | a: &str, |
| | + |
| help: the `Box` type always has a statically known size and allocates its contents in the heap |
| | |
| LL | a: Box<str>, |
| | ++++ + |
| |
| error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union |
| --> $DIR/union-unsized.rs:2:5 |
| | |
| LL | a: str, |
| | ^^^^^^ |
| | |
| = note: union fields must not have drop side-effects, which is currently enforced via either `Copy` or `ManuallyDrop<...>` |
| help: wrap the field type in `ManuallyDrop<...>` |
| | |
| LL | a: std::mem::ManuallyDrop<str>, |
| | +++++++++++++++++++++++ + |
| |
| error[E0277]: the size for values of type `str` cannot be known at compilation time |
| --> $DIR/union-unsized.rs:11:8 |
| | |
| LL | b: str, |
| | ^^^ doesn't have a size known at compile-time |
| | |
| = help: the trait `Sized` is not implemented for `str` |
| = note: no field of a union may have a dynamically sized type |
| = help: change the field's type to have a statically known size |
| help: borrowed types always have a statically known size |
| | |
| LL | b: &str, |
| | + |
| help: the `Box` type always has a statically known size and allocates its contents in the heap |
| | |
| LL | b: Box<str>, |
| | ++++ + |
| |
| error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union |
| --> $DIR/union-unsized.rs:11:5 |
| | |
| LL | b: str, |
| | ^^^^^^ |
| | |
| = note: union fields must not have drop side-effects, which is currently enforced via either `Copy` or `ManuallyDrop<...>` |
| help: wrap the field type in `ManuallyDrop<...>` |
| | |
| LL | b: std::mem::ManuallyDrop<str>, |
| | +++++++++++++++++++++++ + |
| |
| error: aborting due to 4 previous errors |
| |
| Some errors have detailed explanations: E0277, E0740. |
| For more information about an error, try `rustc --explain E0277`. |