// force-host // no-prefer-dynamic #![crate_type = "proc-macro"] extern crate proc_macro; use proc_macro::*; #[proc_macro_attribute] pub fn my_attr(_: TokenStream, input: TokenStream) -> TokenStream { input } #[proc_macro_derive(MyTrait, attributes(my_attr))] pub fn derive(input: TokenStream) -> TokenStream { TokenStream::new() }