0081ef2548
```
error[E0004]: non-exhaustive patterns: type `X` is non-empty
--> file.rs:9:11
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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 {
| ^
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= 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
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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.
110 lines
4.6 KiB
Plaintext
110 lines
4.6 KiB
Plaintext
error: unreachable pattern
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--> $DIR/exhaustive_integer_patterns.rs:23:9
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LL | 200 => {} //~ ERROR unreachable pattern
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| ^^^
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note: lint level defined here
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--> $DIR/exhaustive_integer_patterns.rs:4:9
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LL | #![deny(unreachable_patterns)]
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| ^^^^^^^^^^^^^^^^^^^^
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error[E0004]: non-exhaustive patterns: `128u8..=255u8` not covered
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--> $DIR/exhaustive_integer_patterns.rs:28:11
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LL | match x { //~ ERROR non-exhaustive patterns
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| ^ pattern `128u8..=255u8` not covered
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= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
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error[E0004]: non-exhaustive patterns: `11u8..=19u8`, `31u8..=34u8`, `36u8..=69u8` and 1 more not covered
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--> $DIR/exhaustive_integer_patterns.rs:33:11
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LL | match x { //~ ERROR non-exhaustive patterns
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| ^ patterns `11u8..=19u8`, `31u8..=34u8`, `36u8..=69u8` and 1 more not covered
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= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
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error: unreachable pattern
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--> $DIR/exhaustive_integer_patterns.rs:44:9
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LL | -2..=20 => {} //~ ERROR unreachable pattern
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| ^^^^^^^
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error[E0004]: non-exhaustive patterns: `-128i8..=-8i8`, `-6i8`, `121i8..=124i8` and 1 more not covered
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--> $DIR/exhaustive_integer_patterns.rs:41:11
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LL | match x { //~ ERROR non-exhaustive patterns
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| ^ patterns `-128i8..=-8i8`, `-6i8`, `121i8..=124i8` and 1 more not covered
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= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
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error[E0004]: non-exhaustive patterns: `-128i8` not covered
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--> $DIR/exhaustive_integer_patterns.rs:82:11
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LL | match 0i8 { //~ ERROR non-exhaustive patterns
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| ^^^ pattern `-128i8` not covered
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= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
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error[E0004]: non-exhaustive patterns: `0i16` not covered
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--> $DIR/exhaustive_integer_patterns.rs:90:11
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LL | match 0i16 { //~ ERROR non-exhaustive patterns
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| ^^^^ pattern `0i16` not covered
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= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
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error[E0004]: non-exhaustive patterns: `128u8..=255u8` not covered
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--> $DIR/exhaustive_integer_patterns.rs:108:11
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LL | match 0u8 { //~ ERROR non-exhaustive patterns
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| ^^^ pattern `128u8..=255u8` not covered
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= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
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error[E0004]: non-exhaustive patterns: `(0u8, Some(_))` and `(2u8..=255u8, Some(_))` not covered
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--> $DIR/exhaustive_integer_patterns.rs:120:11
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LL | match (0u8, Some(())) { //~ ERROR non-exhaustive patterns
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| ^^^^^^^^^^^^^^^ patterns `(0u8, Some(_))` and `(2u8..=255u8, Some(_))` not covered
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= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
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error[E0004]: non-exhaustive patterns: `(126u8..=127u8, false)` not covered
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--> $DIR/exhaustive_integer_patterns.rs:125:11
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LL | match (0u8, true) { //~ ERROR non-exhaustive patterns
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| ^^^^^^^^^^^ pattern `(126u8..=127u8, false)` not covered
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= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
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error[E0004]: non-exhaustive patterns: `340282366920938463463374607431768211455u128` not covered
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--> $DIR/exhaustive_integer_patterns.rs:145:11
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LL | match 0u128 { //~ ERROR non-exhaustive patterns
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| ^^^^^ pattern `340282366920938463463374607431768211455u128` not covered
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= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
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error[E0004]: non-exhaustive patterns: `5u128..=340282366920938463463374607431768211455u128` not covered
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--> $DIR/exhaustive_integer_patterns.rs:149:11
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LL | match 0u128 { //~ ERROR non-exhaustive patterns
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| ^^^^^ pattern `5u128..=340282366920938463463374607431768211455u128` not covered
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= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
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error[E0004]: non-exhaustive patterns: `0u128..=3u128` not covered
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--> $DIR/exhaustive_integer_patterns.rs:153:11
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LL | match 0u128 { //~ ERROR non-exhaustive patterns
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| ^^^^^ pattern `0u128..=3u128` not covered
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= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
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error: aborting due to 13 previous errors
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For more information about this error, try `rustc --explain E0004`.
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