| error[E0277]: the size for values of type `T` cannot be known at compilation time |
| --> $DIR/unsized-enum.rs:6:36 |
| | |
| LL | enum Foo<U> { FooSome(U), FooNone } |
| | ----------- required by `Foo` |
| LL | fn foo1<T>() { not_sized::<Foo<T>>() } // Hunky dory. |
| LL | fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() } |
| | -- ^^^^^^ doesn't have a size known at compile-time |
| | | |
| | help: consider further restricting this bound: `T: std::marker::Sized +` |
| | |
| = help: the trait `std::marker::Sized` is not implemented for `T` |
| = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait> |
| |
| error: aborting due to previous error |
| |
| For more information about this error, try `rustc --explain E0277`. |
