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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`.
|
