mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 07:14:28 +00:00
36 lines
1.2 KiB
Plaintext
36 lines
1.2 KiB
Plaintext
error[E0277]: the size for values of type `T` cannot be known at compilation time
|
|
--> $DIR/const-argument-if-length.rs:15:12
|
|
|
|
|
LL | pub struct AtLeastByte<T: ?Sized> {
|
|
| - this type parameter needs to be `std::marker::Sized`
|
|
LL | value: 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 - pub struct AtLeastByte<T: ?Sized> {
|
|
LL + pub struct AtLeastByte<T> {
|
|
|
|
|
help: borrowed types always have a statically known size
|
|
|
|
|
LL | value: &T,
|
|
| +
|
|
help: the `Box` type always has a statically known size and allocates its contents in the heap
|
|
|
|
|
LL | value: Box<T>,
|
|
| ++++ +
|
|
|
|
error: unconstrained generic constant
|
|
--> $DIR/const-argument-if-length.rs:17:10
|
|
|
|
|
LL | pad: [u8; is_zst::<T>()],
|
|
| ^^^^^^^^^^^^^^^^^^^
|
|
|
|
|
= help: try adding a `where` bound using this expression: `where [(); is_zst::<T>()]:`
|
|
|
|
error: aborting due to 2 previous errors
|
|
|
|
For more information about this error, try `rustc --explain E0277`.
|