type A = rustfmt; //~ ERROR expected type, found tool module `rustfmt` type B = rustfmt::skip; //~ ERROR expected type, found tool attribute `rustfmt::skip` #[derive(rustfmt)] //~ ERROR cannot find derive macro `rustfmt` in this scope struct S; // Interpreted as a feature gated custom attribute #[rustfmt] //~ ERROR cannot find attribute macro `rustfmt` in this scope fn check() {} #[rustfmt::skip] // OK fn main() { rustfmt; //~ ERROR expected value, found tool module `rustfmt` rustfmt!(); //~ ERROR cannot find macro `rustfmt!` in this scope rustfmt::skip; //~ ERROR expected value, found tool attribute `rustfmt::skip` }