// compile-flags: -Z trace-macros #![recursion_limit="4"] macro_rules! my_faulty_macro { () => { my_faulty_macro!(bcd); //~ ERROR no rules }; } macro_rules! pat_macro { () => { pat_macro!(A{a:a, b:0, c:_, ..}); }; ($a:pat) => { $a }; } macro_rules! my_recursive_macro { () => { my_recursive_macro!(); //~ ERROR recursion limit }; } macro_rules! my_macro { () => { }; } fn main() { my_faulty_macro!(); my_recursive_macro!(); test!(); non_exisiting!(); derive!(Debug); let a = pat_macro!(); } #[my_macro] fn use_bang_macro_as_attr(){} #[derive(Debug)] fn use_derive_macro_as_attr(){}