mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-01 19:23:50 +00:00
a3cf3822d2
When the return type of a function call depends on the type of an
argument, e.g.
```
fn foo<T>(x: T) -> T {
x
}
```
and the expected type is set due to either an explicitly typed
binding, or because the call to the function is in a tail position
without semicolon, the current error implies that the argument in the
call has the wrong type.
This new hint highlights that the expected type doesn't match the
returned type, which matches the argument type, and that that's why
we're flagging the argument type.
Fixes #43608.
58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
error[E0308]: mismatched types
|
|
--> $DIR/issue-87461.rs:10:8
|
|
|
|
|
LL | Ok(())
|
|
| -- ^^ expected `u16`, found `()`
|
|
| |
|
|
| arguments to this enum variant are incorrect
|
|
|
|
|
help: the type constructed contains `()` due to the type of the argument passed
|
|
--> $DIR/issue-87461.rs:10:5
|
|
|
|
|
LL | Ok(())
|
|
| ^^^--^
|
|
| |
|
|
| this argument influences the type of `Ok`
|
|
note: tuple variant defined here
|
|
--> $SRC_DIR/core/src/result.rs:LL:COL
|
|
|
|
error[E0308]: mismatched types
|
|
--> $DIR/issue-87461.rs:17:8
|
|
|
|
|
LL | Ok(())
|
|
| -- ^^ expected `u16`, found `()`
|
|
| |
|
|
| arguments to this enum variant are incorrect
|
|
|
|
|
help: the type constructed contains `()` due to the type of the argument passed
|
|
--> $DIR/issue-87461.rs:17:5
|
|
|
|
|
LL | Ok(())
|
|
| ^^^--^
|
|
| |
|
|
| this argument influences the type of `Ok`
|
|
note: tuple variant defined here
|
|
--> $SRC_DIR/core/src/result.rs:LL:COL
|
|
|
|
error[E0308]: mismatched types
|
|
--> $DIR/issue-87461.rs:26:12
|
|
|
|
|
LL | Ok(())
|
|
| -- ^^ expected `u16`, found `()`
|
|
| |
|
|
| arguments to this enum variant are incorrect
|
|
|
|
|
help: the type constructed contains `()` due to the type of the argument passed
|
|
--> $DIR/issue-87461.rs:26:9
|
|
|
|
|
LL | Ok(())
|
|
| ^^^--^
|
|
| |
|
|
| this argument influences the type of `Ok`
|
|
note: tuple variant defined here
|
|
--> $SRC_DIR/core/src/result.rs:LL:COL
|
|
|
|
error: aborting due to 3 previous errors
|
|
|
|
For more information about this error, try `rustc --explain E0308`.
|