// force-host // no-prefer-dynamic #![crate_type = "proc-macro"] extern crate proc_macro; use proc_macro::TokenStream; #[proc_macro_attribute] pub fn assert_input(args: TokenStream, input: TokenStream) -> TokenStream { assert_eq!(input.to_string(), "trait Alias = Sized;"); assert!(args.is_empty()); TokenStream::new() }