mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-01 23:12:02 +00:00
19 lines
802 B
Plaintext
19 lines
802 B
Plaintext
error[E0746]: return type cannot have an unboxed trait object
|
|
--> $DIR/issue-91803.rs:3:43
|
|
|
|
|
LL | fn or<'a>(first: &'static dyn Foo<'a>) -> dyn Foo<'a> {
|
|
| ^^^^^^^^^^^ doesn't have a size known at compile-time
|
|
|
|
|
help: return an `impl Trait` instead of a `dyn Trait`, if all returned values are the same type
|
|
|
|
|
LL | fn or<'a>(first: &'static dyn Foo<'a>) -> impl Foo<'a> {
|
|
| ~~~~
|
|
help: box the return type, and wrap all of the returned values in `Box::new`
|
|
|
|
|
LL | fn or<'a>(first: &'static dyn Foo<'a>) -> Box<dyn Foo<'a>> {
|
|
| ++++ +
|
|
|
|
error: aborting due to 1 previous error
|
|
|
|
For more information about this error, try `rustc --explain E0746`.
|