| error[E0308]: mismatched types |
| --> $DIR/issue-100285.rs:2:5 |
| | |
| LL | fn foo(n: i32) -> i32 { |
| | --- expected `i32` because of return type |
| LL | / for i in 0..0 { |
| LL | | |
| LL | | if n < 0 { |
| LL | | return i; |
| ... | |
| LL | | |
| LL | | } |
| | |_____^ expected `i32`, found `()` |
| | |
| note: the function expects a value to always be returned, but loops might run zero times |
| --> $DIR/issue-100285.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 |
| LL | } else if n < 10 { |
| LL | return 1; |
| | -------- if the loop doesn't execute, this value would never get returned |
| LL | } else if n < 20 { |
| LL | return 2; |
| | -------- if the loop doesn't execute, this value would never get returned |
| = note: if the loop doesn't execute, 3 other values would never get returned |
| = help: return a value for the case when the loop has zero elements to iterate on, or consider changing the return type to account for that possibility |
| |
| error: aborting due to previous error |
| |
| For more information about this error, try `rustc --explain E0308`. |
