1 error: no rules expected the token `_`
2 --> $DIR/underscore-ident-matcher.rs:8:19
4 LL | macro_rules! identity {
5 | --------------------- when calling this macro
7 LL | let identity!(_) = 10;
8 | ^ no rules expected this token in macro call
10 note: while trying to match meta-variable `$i:ident`
11 --> $DIR/underscore-ident-matcher.rs:2:6
16 error: aborting due to previous error