// Proc macros using `mixed_site` spans exhibit usual properties of `macro_rules` hygiene. // aux-build:mixed-site-span.rs #[macro_use] extern crate mixed_site_span; struct ItemUse; fn main() { 'label_use: loop { let local_use = 1; proc_macro_rules!(); //~^ ERROR use of undeclared label `'label_use` //~| ERROR cannot find value `local_use` in this scope ItemDef; // OK local_def; //~ ERROR cannot find value `local_def` in this scope } } macro_rules! pass_dollar_crate { () => (proc_macro_rules!($crate);) //~ ERROR cannot find type `ItemUse` in crate `$crate` } pass_dollar_crate!();