// force-host // no-prefer-dynamic #![crate_type = "proc-macro"] extern crate proc_macro; use proc_macro::TokenStream; #[proc_macro_derive(AddImpl)] // #[cfg(proc_macro)] pub fn derive(input: TokenStream) -> TokenStream { "impl B { fn foo(&self) {} } fn foo() {} mod bar { pub fn foo() {} } ".parse().unwrap() }