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7453a54e | 1 | // Copyright 2016 The Rust Project Developers. See the COPYRIGHT |
223e47cc LB |
2 | // file at the top-level directory of this distribution and at |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
c30ab7b3 | 11 | #![crate_type = "proc-macro"] |
1a4d82fc | 12 | |
c30ab7b3 | 13 | extern crate proc_macro; |
223e47cc | 14 | |
c30ab7b3 | 15 | use proc_macro::TokenStream; |
223e47cc | 16 | |
c30ab7b3 | 17 | #[proc_macro_derive(A)] |
9e0c209e SL |
18 | pub fn derive(input: TokenStream) -> TokenStream { |
19 | let input = input.to_string(); | |
c30ab7b3 | 20 | assert!(input.contains("struct A;")); |
9e0c209e | 21 | "struct B;".parse().unwrap() |
223e47cc | 22 | } |