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error[E0005]: refutable pattern in local binding: `Either::B(_)` not covered
--> $DIR/exhaustive_patterns.rs:20:9
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LL | let Either::A(()) = foo();
| ^^^^^^^^^^^^^ pattern `Either::B(_)` not covered
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= 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: `Either<(), !>` defined here
--> $DIR/exhaustive_patterns.rs:12:5
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LL | enum Either<A, B> {
| ------
LL | A(A),
LL | B(inner::Wrapper<B>),
| ^ not covered
= note: the matched value is of type `Either<(), !>`
help: you might want to use `if let` to ignore the variant that isn't matched
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LL | if let Either::A(()) = foo() { todo!() }
| ++ ~~~~~~~~~~~
error: aborting due to previous error
For more information about this error, try `rustc --explain E0005`.
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