rust/src/test/ui/suggestions/expected-boxed-future-isnt-pinned.stderr

error[E0308]: mismatched types
  --> $DIR/expected-boxed-future-isnt-pinned.rs:11:5
   |
LL | fn foo<F: Future<Output=i32> + Send + 'static>(x: F) -> BoxFuture<'static, i32> {
   |        - this type parameter                            ----------------------- expected `std::pin::Pin<std::boxed::Box<(dyn std::future::Future<Output = i32> + std::marker::Send + 'static)>>` because of return type
LL |     // We could instead use an `async` block, but this way we have no std spans.
LL |     x
   |     ^
   |     |
   |     expected struct `std::pin::Pin`, found type parameter `F`
   |     help: you need to pin and box this expression: `Box::pin(x)`
   |
   = note:      expected struct `std::pin::Pin<std::boxed::Box<(dyn std::future::Future<Output = i32> + std::marker::Send + 'static)>>`
           found type parameter `F`
   = help: type parameters must be constrained to match other types
   = note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.
When expecting `BoxFuture` and using `async {}`, suggest `Box::pin` 2020-02-12 01:19:05 +00:00			`error[E0308]: mismatched types`
Account for `Box::new(impl Future)` and emit help `use Box::pin` 2020-02-12 19:11:55 +00:00			`--> $DIR/expected-boxed-future-isnt-pinned.rs:11:5`
When expecting `BoxFuture` and using `async {}`, suggest `Box::pin` 2020-02-12 01:19:05 +00:00			`\|`
Remove std lib `Span` from expected boxed future test 2020-02-12 01:35:04 +00:00			`LL \| fn foo<F: Future<Output=i32> + Send + 'static>(x: F) -> BoxFuture<'static, i32> {`
			\| - this type parameter ----------------------- expected `std::pin::Pin<std::boxed::Box<(dyn std::future::Future<Output = i32> + std::marker::Send + 'static)>>` because of return type
			LL \| // We could instead use an `async` block, but this way we have no std spans.
			`LL \| x`
			`\| ^`
			`\| \|`
			\| expected struct `std::pin::Pin`, found type parameter `F`
			\| help: you need to pin and box this expression: `Box::pin(x)`
When expecting `BoxFuture` and using `async {}`, suggest `Box::pin` 2020-02-12 01:19:05 +00:00			`\|`
Remove std lib `Span` from expected boxed future test 2020-02-12 01:35:04 +00:00			= note: expected struct `std::pin::Pin<std::boxed::Box<(dyn std::future::Future<Output = i32> + std::marker::Send + 'static)>>`
			found type parameter `F`
			`= help: type parameters must be constrained to match other types`
			`= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters`
When expecting `BoxFuture` and using `async {}`, suggest `Box::pin` 2020-02-12 01:19:05 +00:00
Add trait `Self` filtering to `rustc_on_unimplemented` 2020-02-13 00:50:28 +00:00			`error: aborting due to previous error`
When expecting `BoxFuture` and using `async {}`, suggest `Box::pin` 2020-02-12 01:19:05 +00:00
Add trait `Self` filtering to `rustc_on_unimplemented` 2020-02-13 00:50:28 +00:00			For more information about this error, try `rustc --explain E0308`.