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|
error[E0004]: non-exhaustive patterns: `Err(_)` not covered
--> $DIR/uninhabited-matches-feature-gated.rs:6:19
|
LL | let _ = match x {
| ^ pattern `Err(_)` not covered
|
note: `Result<u32, &Void>` defined here
--> $SRC_DIR/core/src/result.rs:LL:COL
|
LL | pub enum Result<T, E> {
| ---------------------
...
LL | Err(#[stable(feature = "rust1", since = "1.0.0")] E),
| ^^^ not covered
= note: the matched value is of type `Result<u32, &Void>`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
|
LL ~ Ok(n) => n,
LL ~ Err(_) => todo!(),
|
error[E0004]: non-exhaustive patterns: type `&Void` is non-empty
--> $DIR/uninhabited-matches-feature-gated.rs:15:19
|
LL | let _ = match x {};
| ^
|
note: `Void` defined here
--> $DIR/uninhabited-matches-feature-gated.rs:2:6
|
LL | enum Void {}
| ^^^^
= note: the matched value is of type `&Void`
= note: references are always considered inhabited
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown
|
LL ~ let _ = match x {
LL + _ => todo!(),
LL ~ };
|
error[E0004]: non-exhaustive patterns: type `(Void,)` is non-empty
--> $DIR/uninhabited-matches-feature-gated.rs:18:19
|
LL | let _ = match x {};
| ^
|
= note: the matched value is of type `(Void,)`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown
|
LL ~ let _ = match x {
LL + _ => todo!(),
LL ~ };
|
error[E0004]: non-exhaustive patterns: type `[Void; 1]` is non-empty
--> $DIR/uninhabited-matches-feature-gated.rs:21:19
|
LL | let _ = match x {};
| ^
|
= note: the matched value is of type `[Void; 1]`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown
|
LL ~ let _ = match x {
LL + _ => todo!(),
LL ~ };
|
error[E0004]: non-exhaustive patterns: `&[_, ..]` not covered
--> $DIR/uninhabited-matches-feature-gated.rs:24:19
|
LL | let _ = match x {
| ^ pattern `&[_, ..]` not covered
|
= note: the matched value is of type `&[Void]`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
|
LL ~ &[] => (),
LL ~ &[_, ..] => todo!(),
|
error[E0004]: non-exhaustive patterns: `Err(_)` not covered
--> $DIR/uninhabited-matches-feature-gated.rs:32:19
|
LL | let _ = match x {
| ^ pattern `Err(_)` not covered
|
note: `Result<u32, Void>` defined here
--> $SRC_DIR/core/src/result.rs:LL:COL
|
LL | pub enum Result<T, E> {
| ---------------------
...
LL | Err(#[stable(feature = "rust1", since = "1.0.0")] E),
| ^^^ not covered
= note: the matched value is of type `Result<u32, Void>`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
|
LL ~ Ok(x) => x,
LL ~ Err(_) => todo!(),
|
error[E0005]: refutable pattern in local binding: `Err(_)` not covered
--> $DIR/uninhabited-matches-feature-gated.rs:37:9
|
LL | let Ok(x) = x;
| ^^^^^ pattern `Err(_)` not covered
|
= note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
= note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
note: `Result<u32, Void>` defined here
--> $SRC_DIR/core/src/result.rs:LL:COL
|
LL | pub enum Result<T, E> {
| ---------------------
...
LL | Err(#[stable(feature = "rust1", since = "1.0.0")] E),
| ^^^ not covered
= note: the matched value is of type `Result<u32, Void>`
help: you might want to use `if let` to ignore the variant that isn't matched
|
LL | let x = if let Ok(x) = x { x } else { todo!() };
| ++++++++++ ++++++++++++++++++++++
help: alternatively, on nightly, you might want to use `#![feature(let_else)]` to handle the variant that isn't matched
|
LL | let Ok(x) = x else { todo!() };
| ++++++++++++++++
error: aborting due to 7 previous errors
Some errors have detailed explanations: E0004, E0005.
For more information about an error, try `rustc --explain E0004`.
|
