syntax: make old #[deriving_foo] attribute obsolete

src/test/compile-fail/deriving-obsolete.rs

@@ -0,0 +1,17 @@
+// Copyright 2013 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.
+
+#[deriving_clone] //~ ERROR `#[deriving_clone]` is obsolete; use `#[deriving(Clone)]` instead
+#[deriving_eq] //~ ERROR `#[deriving_eq]` is obsolete; use `#[deriving(Eq)]` instead
+#[deriving_iter_bytes]
+//~^ ERROR `#[deriving_iter_bytes]` is obsolete; use `#[deriving(IterBytes)]` instead
+struct Foo;
+
+pub fn main() { }