// run-check //@ aux-build:proc-macro-type-error.rs extern crate proc_macro_type_error; use proc_macro_type_error::hello; #[hello] //~ERROR mismatched types fn abc() {} fn x(_: &mut i32) {} macro_rules! bla { () => { x(123); //~^ ERROR mismatched types //~| SUGGESTION &mut }; ($v:expr) => { x($v) } } fn main() { bla!(); bla!(456); //~^ ERROR mismatched types //~| SUGGESTION &mut }