1 error: no rules expected the token `$`
2 --> $DIR/best-failure.rs:4:30
4 LL | macro_rules! number {
5 | ------------------- when calling this macro
7 LL | number!(neg $signed, $self);
8 | ^^^^^ no rules expected this token in macro call
10 LL | number! { false => u8; }
11 | ------------------------ in this macro invocation
13 note: while trying to match meta-variable `$self:ident`
14 --> $DIR/best-failure.rs:2:17
16 LL | (neg false, $self:ident) => { $self };
18 = note: this error originates in the macro `number` (in Nightly builds, run with -Z macro-backtrace for more info)
20 error: aborting due to previous error