1 error[E0277]: the size for values of type `T` cannot be known at compilation time
2 --> $DIR/const-argument-if-length.rs:15:12
4 LL | pub struct AtLeastByte<T: ?Sized> {
5 | - this type parameter needs to be `std::marker::Sized`
7 | ^ doesn't have a size known at compile-time
9 = note: only the last field of a struct may have a dynamically sized type
10 = help: change the field's type to have a statically known size
11 help: consider removing the `?Sized` bound to make the type parameter `Sized`
13 LL - pub struct AtLeastByte<T: ?Sized> {
14 LL + pub struct AtLeastByte<T> {
16 help: borrowed types always have a statically known size
20 help: the `Box` type always has a statically known size and allocates its contents in the heap
25 error: unconstrained generic constant
26 --> $DIR/const-argument-if-length.rs:17:10
28 LL | pad: [u8; is_zst::<T>()],
31 = help: try adding a `where` bound using this expression: `where [(); is_zst::<T>()]:`
33 error: aborting due to 2 previous errors
35 For more information about this error, try `rustc --explain E0277`.