tests/ui/unsized/unsized-enum.stderr

   1 error[E0277]: the size for values of type `T` cannot be known at compilation time
   2   --> $DIR/unsized-enum.rs:6:36
   3    |
   4 LL | fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() }
   5    |         -                          ^^^^^^ doesn't have a size known at compile-time
   6    |         |
   7    |         this type parameter needs to be `std::marker::Sized`
   8    |
   9 note: required by a bound in `Foo`
  10   --> $DIR/unsized-enum.rs:4:10
  11    |
  12 LL | enum Foo<U> { FooSome(U), FooNone }
  13    |          ^ required by this bound in `Foo`
  14 help: you could relax the implicit `Sized` bound on `U` if it were used through indirection like `&U` or `Box<U>`
  15   --> $DIR/unsized-enum.rs:4:10
  16    |
  17 LL | enum Foo<U> { FooSome(U), FooNone }
  18    |          ^            - ...if indirection were used here: `Box<U>`
  19    |          |
  20    |          this could be changed to `U: ?Sized`...
  21 help: consider removing the `?Sized` bound to make the type parameter `Sized`
  22    |
  23 LL - fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() }
  24 LL + fn foo2<T>() { not_sized::<Foo<T>>() }
  25    |
  26
  27 error: aborting due to previous error
  28
  29 For more information about this error, try `rustc --explain E0277`.