error: no rules expected the token `_` | |
--> $DIR/underscore-ident-matcher.rs:8:19 | |
| | |
LL | macro_rules! identity { | |
| --------------------- when calling this macro | |
... | |
LL | let identity!(_) = 10; | |
| ^ no rules expected this token in macro call | |
error: aborting due to previous error | |