src/test/ui/const-generics/const-argument-if-length.min.stderr

   1 error: generic parameters may not be used in const operations
   2   --> $DIR/const-argument-if-length.rs:17:24
   3    |
   4 LL |     pad: [u8; is_zst::<T>()],
   5    |                        ^ cannot perform const operation using `T`
   6    |
   7    = note: type parameters may not be used in const expressions
   8    = help: use `#![feature(generic_const_exprs)]` to allow generic const expressions
   9
  10 error[E0277]: the size for values of type `T` cannot be known at compilation time
  11   --> $DIR/const-argument-if-length.rs:15:12
  12    |
  13 LL | pub struct AtLeastByte<T: ?Sized> {
  14    |                        - this type parameter needs to be `std::marker::Sized`
  15 LL |     value: T,
  16    |            ^ doesn't have a size known at compile-time
  17    |
  18    = note: only the last field of a struct may have a dynamically sized type
  19    = help: change the field's type to have a statically known size
  20 help: consider removing the `?Sized` bound to make the type parameter `Sized`
  21    |
  22 LL - pub struct AtLeastByte<T: ?Sized> {
  23 LL + pub struct AtLeastByte<T> {
  24    |
  25 help: borrowed types always have a statically known size
  26    |
  27 LL |     value: &T,
  28    |            +
  29 help: the `Box` type always has a statically known size and allocates its contents in the heap
  30    |
  31 LL |     value: Box<T>,
  32    |            ++++ +
  33
  34 error: aborting due to 2 previous errors
  35
  36 For more information about this error, try `rustc --explain E0277`.