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error[E0308]: mismatched types
--> $DIR/coerce-result-return-value.rs:8:5
|
LL | fn foo1(x: Result<(), A>) -> Result<(), B> {
| ------------- expected `Result<(), B>` because of return type
LL | x
| ^ expected `Result<(), B>`, found `Result<(), A>`
|
= note: expected enum `Result<_, B>`
found enum `Result<_, A>`
help: use `?` to coerce and return an appropriate `Err`, and wrap the resulting value in `Ok` so the expression remains of type `Result`
|
LL | Ok(x?)
| +++ ++
error[E0308]: mismatched types
--> $DIR/coerce-result-return-value.rs:11:12
|
LL | fn foo2(x: Result<(), A>) -> Result<(), B> {
| ------------- expected `Result<(), B>` because of return type
LL | return x;
| ^ expected `Result<(), B>`, found `Result<(), A>`
|
= note: expected enum `Result<_, B>`
found enum `Result<_, A>`
help: use `?` to coerce and return an appropriate `Err`, and wrap the resulting value in `Ok` so the expression remains of type `Result`
|
LL | return Ok(x?);
| +++ ++
error[E0308]: mismatched types
--> $DIR/coerce-result-return-value.rs:15:9
|
LL | fn foo3(x: Result<(), A>) -> Result<(), B> {
| ------------- expected `Result<(), B>` because of return type
LL | if true {
LL | x
| ^ expected `Result<(), B>`, found `Result<(), A>`
|
= note: expected enum `Result<_, B>`
found enum `Result<_, A>`
help: use `?` to coerce and return an appropriate `Err`, and wrap the resulting value in `Ok` so the expression remains of type `Result`
|
LL | Ok(x?)
| +++ ++
error[E0308]: mismatched types
--> $DIR/coerce-result-return-value.rs:17:9
|
LL | fn foo3(x: Result<(), A>) -> Result<(), B> {
| ------------- expected `Result<(), B>` because of return type
...
LL | x
| ^ expected `Result<(), B>`, found `Result<(), A>`
|
= note: expected enum `Result<_, B>`
found enum `Result<_, A>`
help: use `?` to coerce and return an appropriate `Err`, and wrap the resulting value in `Ok` so the expression remains of type `Result`
|
LL | Ok(x?)
| +++ ++
error: aborting due to 4 previous errors
For more information about this error, try `rustc --explain E0308`.
|
