Use heapsize_derive instead of heapsize_plugin

components/range/Cargo.toml

@@ -12,7 +12,7 @@ path = "lib.rs"
 
 [dependencies]
 heapsize = "0.3.0"
-heapsize_plugin = "0.1.2"
+heapsize_derive = "0.1"
 num-traits = "0.1.32"
 rustc-serialize = "0.3"
 serde = "0.8"

components/range/lib.rs

@@ -2,17 +2,14 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-#![feature(custom_derive)]
-#![feature(plugin)]
 #![feature(proc_macro)]
 #![feature(rustc_attrs)]
 #![feature(step_trait)]
 
-#![plugin(heapsize_plugin)]
-
 #![deny(unsafe_code)]
 
 extern crate heapsize;
+#[macro_use] extern crate heapsize_derive;
 extern crate num_traits;
 extern crate rustc_serialize;
 extern crate serde;