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error[E0261]: use of undeclared lifetime name `'x`
--> $DIR/gat-in-trait-path-undeclared-lifetime.rs:6:35
|
LL | fn _f(arg : Box<dyn for<'a> X<Y<'x> = &'a [u32]>>) {}
| ^^ undeclared lifetime
|
= note: for more information on higher-ranked polymorphism, visit https://doc.rust-lang.org/nomicon/hrtb.html
help: consider making the bound lifetime-generic with a new `'x` lifetime
|
LL | fn _f(arg : Box<dyn for<'x, 'a> X<Y<'x> = &'a [u32]>>) {}
| +++
help: consider introducing lifetime `'x` here
|
LL | fn _f<'x>(arg : Box<dyn for<'a> X<Y<'x> = &'a [u32]>>) {}
| ++++
error[E0582]: binding for associated type `Y` references lifetime `'a`, which does not appear in the trait input types
--> $DIR/gat-in-trait-path-undeclared-lifetime.rs:6:33
|
LL | fn _f(arg : Box<dyn for<'a> X<Y<'x> = &'a [u32]>>) {}
| ^^^^^^^^^^^^^^^^^
error[E0582]: binding for associated type `Y` references lifetime `'a`, which does not appear in the trait input types
--> $DIR/gat-in-trait-path-undeclared-lifetime.rs:6:33
|
LL | fn _f(arg : Box<dyn for<'a> X<Y<'x> = &'a [u32]>>) {}
| ^^^^^^^^^^^^^^^^^
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0582]: binding for associated type `Y` references lifetime `'a`, which does not appear in the trait input types
--> $DIR/gat-in-trait-path-undeclared-lifetime.rs:6:33
|
LL | fn _f(arg : Box<dyn for<'a> X<Y<'x> = &'a [u32]>>) {}
| ^^^^^^^^^^^^^^^^^
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0038]: the trait `X` cannot be made into an object
--> $DIR/gat-in-trait-path-undeclared-lifetime.rs:6:19
|
LL | fn _f(arg : Box<dyn for<'a> X<Y<'x> = &'a [u32]>>) {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `X` cannot be made into an object
|
note: for a trait to be "dyn-compatible" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/gat-in-trait-path-undeclared-lifetime.rs:2:8
|
LL | trait X {
| - this trait cannot be made into an object...
LL | type Y<'x>;
| ^ ...because it contains the generic associated type `Y`
= help: consider moving `Y` to another trait
error: aborting due to 5 previous errors
Some errors have detailed explanations: E0038, E0261, E0582.
For more information about an error, try `rustc --explain E0038`.
|
