1 #![feature(proc_macro_tracked_env)]
2 #![crate_type = "proc-macro"]
4 extern crate proc_macro;
8 pub fn access_env_vars(_: TokenStream) -> TokenStream {
9 let _ = tracked_env::var("EXISTING_PROC_MACRO_ENV");
10 let _ = tracked_env::var("NONEXISTENT_PROC_MACEO_ENV");