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error[E0277]: the size for values of type `T` cannot be known at compilation time
--> $DIR/E0375.rs:6:8
|
LL | struct Foo<T: ?Sized, U: ?Sized> {
| - this type parameter needs to be `Sized`
LL | a: i32,
LL | b: T,
| ^ doesn't have a size known at compile-time
|
= note: only the last field of a struct may have a dynamically sized type
= help: change the field's type to have a statically known size
help: consider removing the `?Sized` bound to make the type parameter `Sized`
|
LL - struct Foo<T: ?Sized, U: ?Sized> {
LL + struct Foo<T, U: ?Sized> {
|
help: borrowed types always have a statically known size
|
LL | b: &T,
| +
help: the `Box` type always has a statically known size and allocates its contents in the heap
|
LL | b: Box<T>,
| ++++ +
error[E0375]: implementing `CoerceUnsized` does not allow multiple fields to be coerced
--> $DIR/E0375.rs:10:12
|
LL | impl<T, U> CoerceUnsized<Foo<U, T>> for Foo<T, U> {}
| ^^^^^^^^^^^^^^^^^^^^^^^^
|
note: the trait `CoerceUnsized` may only be implemented when a single field is being coerced
--> $DIR/E0375.rs:6:5
|
LL | b: T,
| ^^^^
LL | c: U,
| ^^^^
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0277, E0375.
For more information about an error, try `rustc --explain E0277`.
|
