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error[E0277]: the trait bound `dyn Setup<From = T>: Setup` is not satisfied
--> $DIR/object-unsafety.rs:12:12
|
LL | copy::<dyn Setup<From=T>>(t)
| ^^^^^^^^^^^^^^^^^ the trait `Setup` is not implemented for `dyn Setup<From = T>`
|
note: required by a bound in `copy`
--> $DIR/object-unsafety.rs:7:12
|
LL | fn copy<U: Setup + ?Sized>(from: &U::From) -> U::From {
| ^^^^^ required by this bound in `copy`
help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
|
LL | pub fn copy_any<T>(t: &T) -> T where dyn Setup<From = T>: Setup {
| ++++++++++++++++++++++++++++++++
error: the type `&<dyn Setup<From = T> as Setup>::From` is not well-formed
--> $DIR/object-unsafety.rs:12:31
|
LL | copy::<dyn Setup<From=T>>(t)
| ^
error[E0308]: mismatched types
--> $DIR/object-unsafety.rs:12:31
|
LL | copy::<dyn Setup<From=T>>(t)
| ------------------------- ^ types differ
| |
| arguments to this function are incorrect
|
= note: expected reference `&<dyn Setup<From = T> as Setup>::From`
found reference `&T`
note: function defined here
--> $DIR/object-unsafety.rs:7:4
|
LL | fn copy<U: Setup + ?Sized>(from: &U::From) -> U::From {
| ^^^^ --------------
error[E0308]: mismatched types
--> $DIR/object-unsafety.rs:12:5
|
LL | pub fn copy_any<T>(t: &T) -> T {
| - - expected `T` because of return type
| |
| expected this type parameter
LL | copy::<dyn Setup<From=T>>(t)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ types differ
|
= note: expected type parameter `T`
found associated type `<dyn Setup<From = T> as Setup>::From`
= note: you might be missing a type parameter or trait bound
error: the type `<dyn Setup<From = T> as Setup>::From` is not well-formed
--> $DIR/object-unsafety.rs:12:5
|
LL | copy::<dyn Setup<From=T>>(t)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error[E0277]: the size for values of type `<dyn Setup<From = T> as Setup>::From` cannot be known at compilation time
--> $DIR/object-unsafety.rs:12:5
|
LL | copy::<dyn Setup<From=T>>(t)
| ^^^^^^^^^^^^^^^^^^^^^^^^^---
| |
| doesn't have a size known at compile-time
| this returned value is of type `<dyn Setup<From = T> as Setup>::From`
|
= help: the trait `Sized` is not implemented for `<dyn Setup<From = T> as Setup>::From`
= note: the return type of a function must have a statically known size
help: consider further restricting the associated type
|
LL | pub fn copy_any<T>(t: &T) -> T where <dyn Setup<From = T> as Setup>::From: Sized {
| +++++++++++++++++++++++++++++++++++++++++++++++++
error: aborting due to 6 previous errors
Some errors have detailed explanations: E0277, E0308.
For more information about an error, try `rustc --explain E0277`.
|
