| error[E0277]: the size for values of type `T` cannot be known at compilation time |
| --> $DIR/unsized-struct.rs:6:36 |
| | |
| LL | struct Foo<T> { data: T } |
| | - required by this bound in `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 |
| | | |
| | this type parameter needs to be `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> |
| help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>` |
| --> $DIR/unsized-struct.rs:4:12 |
| | |
| LL | struct Foo<T> { data: T } |
| | ^ - ...if indirection was used here: `Box<T>` |
| | | |
| | this could be changed to `T: ?Sized`... |
| |
| error[E0277]: the size for values of type `T` cannot be known at compilation time |
| --> $DIR/unsized-struct.rs:13:24 |
| | |
| LL | fn is_sized<T:Sized>() { } |
| | - required by this bound in `is_sized` |
| ... |
| LL | fn bar2<T: ?Sized>() { is_sized::<Bar<T>>() } |
| | - ^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time |
| | | |
| | this type parameter needs to be `std::marker::Sized` |
| | |
| = help: within `Bar<T>`, 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> |
| = note: required because it appears within the type `Bar<T>` |
| |
| error: aborting due to 2 previous errors |
| |
| For more information about this error, try `rustc --explain E0277`. |