mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-03 20:23:59 +00:00
45efb8e6a6
We currently provide only a `help` message, this PR introduces the last
two structured suggestions instead:
```
error[E0308]: mismatched types
--> $DIR/issue-98982.rs:2:5
|
LL | fn foo() -> i32 {
| --- expected `i32` because of return type
LL | / for i in 0..0 {
LL | | return i;
LL | | }
| |_____^ expected `i32`, found `()`
|
note: the function expects a value to always be returned, but loops might run zero times
--> $DIR/issue-98982.rs:2:5
|
LL | for i in 0..0 {
| ^^^^^^^^^^^^^ this might have zero elements to iterate on
LL | return i;
| -------- if the loop doesn't execute, this value would never get returned
help: return a value for the case when the loop has zero elements to iterate on
|
LL ~ }
LL ~ /* `i32` value */
|
help: otherwise consider changing the return type to account for that possibility
|
LL ~ fn foo() -> Option<i32> {
LL | for i in 0..0 {
LL ~ return Some(i);
LL ~ }
LL ~ None
|
```
Fix #98982.
46 lines
1.5 KiB
Plaintext
46 lines
1.5 KiB
Plaintext
error[E0308]: mismatched types
|
|
--> $DIR/break-while-condition.rs:9:20
|
|
|
|
|
LL | let _: ! = {
|
|
| ____________________^
|
|
LL | | 'a: while break 'a {};
|
|
LL | | };
|
|
| |_________^ expected `!`, found `()`
|
|
|
|
|
= note: expected type `!`
|
|
found unit type `()`
|
|
|
|
error[E0308]: mismatched types
|
|
--> $DIR/break-while-condition.rs:16:13
|
|
|
|
|
LL | / while false {
|
|
LL | | break
|
|
LL | | }
|
|
| |_____________^ expected `!`, found `()`
|
|
|
|
|
= note: expected type `!`
|
|
found unit type `()`
|
|
|
|
error[E0308]: mismatched types
|
|
--> $DIR/break-while-condition.rs:24:13
|
|
|
|
|
LL | / while false {
|
|
LL | | return
|
|
LL | | }
|
|
| |_____________^ expected `!`, found `()`
|
|
|
|
|
= note: expected type `!`
|
|
found unit type `()`
|
|
note: the function expects a value to always be returned, but loops might run zero times
|
|
--> $DIR/break-while-condition.rs:24:13
|
|
|
|
|
LL | while false {
|
|
| ^^^^^^^^^^^ this might have zero elements to iterate on
|
|
LL | return
|
|
| ------ if the loop doesn't execute, this value would never get returned
|
|
= help: return a value for the case when the loop has zero elements to iterate on, otherwise consider changing the return type to account for that possibility
|
|
|
|
error: aborting due to 3 previous errors
|
|
|
|
For more information about this error, try `rustc --explain E0308`.
|