src/test/compile-fail-fulldeps/proc-macro/shadow-builtin.rs

   1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
   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
  11 #![crate_type = "proc-macro"]
  12 #![feature(proc_macro)]
  13
  14 extern crate proc_macro;
  15
  16 use proc_macro::TokenStream;
  17
  18 #[proc_macro_derive(PartialEq)]
  19 //~^ ERROR: cannot override a built-in #[derive] mode
  20 pub fn foo(input: TokenStream) -> TokenStream {
  21     input
  22 }