| // Copyright 2016 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // force-host |
| // no-prefer-dynamic |
| |
| #![crate_type = "proc-macro"] |
| |
| extern crate proc_macro; |
| |
| use proc_macro::TokenStream; |
| |
| #[proc_macro_derive(B, attributes(B, C))] |
| pub fn derive(input: TokenStream) -> TokenStream { |
| let input = input.to_string(); |
| assert!(input.contains("#[B [ arbitrary tokens ]]")); |
| assert!(input.contains("struct B {")); |
| assert!(input.contains("#[C]")); |
| "".parse().unwrap() |
| } |
