2018-08-08 14:28:26 +02:00
|
|
|
error[E0005]: refutable pattern in local binding: `T(_, _)` not covered
|
2018-12-25 08:56:47 -07:00
|
|
|
--> $DIR/empty-never-array.rs:10:9
|
2018-08-08 14:28:26 +02:00
|
|
|
|
|
Point at enum definition when match patterns are not exhaustive
```
error[E0004]: non-exhaustive patterns: type `X` is non-empty
--> file.rs:9:11
|
1 | / enum X {
2 | | A,
| | - variant not covered
3 | | B,
| | - variant not covered
4 | | C,
| | - variant not covered
5 | | }
| |_- `X` defined here
...
9 | match x {
| ^
|
= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
error[E0004]: non-exhaustive patterns: `B` and `C` not covered
--> file.rs:11:11
|
1 | / enum X {
2 | | A,
3 | | B,
4 | | C,
| | - not covered
5 | | }
| |_- `X` defined here
...
11 | match x {
| ^ patterns `C` not covered
```
When a match expression doesn't have patterns covering every variant,
point at the enum's definition span. On a best effort basis, point at the
variant(s) that are missing. This does not handle the case when the missing
pattern is due to a field's enum variants:
```
enum E1 {
A,
B,
C,
}
enum E2 {
A(E1),
B,
}
fn foo() {
match E2::A(E1::A) {
E2::A(E1::B) => {}
E2::B => {}
}
//~^ ERROR `E2::A(E1::A)` and `E2::A(E1::C)` not handled
}
```
Unify look between match with no arms and match with some missing patterns.
Fix #37518.
2019-02-10 05:12:00 -08:00
|
|
|
LL | / enum Helper<T, U> {
|
|
|
|
|
LL | | T(T, [!; 0]),
|
|
|
|
|
LL | | #[allow(dead_code)]
|
|
|
|
|
LL | | U(U),
|
|
|
|
|
LL | | }
|
|
|
|
|
| |_- `Helper<T, U>` defined here
|
|
|
|
|
...
|
|
|
|
|
LL | let Helper::U(u) = Helper::T(t, []);
|
|
|
|
|
| ^^^^^^^^^^^^ pattern `T(_, _)` not covered
|
2018-08-08 14:28:26 +02:00
|
|
|
|
|
|
|
|
error: aborting due to previous error
|
|
|
|
|
|
|
|
|
|
For more information about this error, try `rustc --explain E0005`.
|