rust/src/test/ui/expanded-cfg.rs

// skip-codegen
// compile-pass
#![feature(custom_attribute)]
macro_rules! mac {
    {} => {
        #[cfg(attr)]
        mod m {
            #[lang_item]
            fn f() {}

            #[cfg_attr(target_thread_local, custom)]
            fn g() {}
        }

        #[cfg(attr)]
        unconfigured_invocation!();
    }
}

mac! {}


fn main() {}