1 error: macro expansion ends with an incomplete expression: expected expression
2 --> $DIR/macro-in-expression-context-2.rs:5:16
4 LL | macro_rules! empty { () => () }
8 | ^^^^^^^^ expected expression
10 = note: the macro call doesn't expand to an expression, but it can expand to a statement
11 help: add `;` to interpret the expansion as a statement
13 LL | _ => { empty!(); }
16 error: aborting due to previous error