//@ force-host //@ no-prefer-dynamic #![crate_type = "proc-macro"] extern crate proc_macro; use proc_macro::TokenStream; #[proc_macro] pub fn rewrite(input: TokenStream) -> TokenStream { let input = input.to_string(); assert_eq!(input, r#""Hello, world!""#); r#""NOT Hello, world!""#.parse().unwrap() }