libsyntax: use `#[deriving(Copy)]`

3 files changed, 3 insertions, 7 deletions

diff --git a/src/libsyntax/ext/base.rs b/src/libsyntax/ext/base.rs
index 354b53bfc01..3947a602809 100644
--- a/src/libsyntax/ext/base.rs
+++ b/src/libsyntax/ext/base.rs
@@ -223,13 +223,12 @@ impl MacResult for MacItems {
 
 /// Fill-in macro expansion result, to allow compilation to continue
 /// after hitting errors.
+#[deriving(Copy)]
 pub struct DummyResult {
     expr_only: bool,
     span: Span
 }
 
-impl Copy for DummyResult {}
-
 impl DummyResult {
     /// Create a default MacResult that can be anything.
     ///
diff --git a/src/libsyntax/ext/deriving/cmp/ord.rs b/src/libsyntax/ext/deriving/cmp/ord.rs
index bd1962de56e..10e14e0c975 100644
--- a/src/libsyntax/ext/deriving/cmp/ord.rs
+++ b/src/libsyntax/ext/deriving/cmp/ord.rs
@@ -83,12 +83,11 @@ pub fn expand_deriving_ord<F>(cx: &mut ExtCtxt,
     trait_def.expand(cx, mitem, item, push)
 }
 
+#[deriving(Copy)]
 pub enum OrderingOp {
     PartialCmpOp, LtOp, LeOp, GtOp, GeOp,
 }
 
-impl Copy for OrderingOp {}
-
 pub fn some_ordering_collapsed(cx: &mut ExtCtxt,
                                span: Span,
                                op: OrderingOp,
diff --git a/src/libsyntax/ext/mtwt.rs b/src/libsyntax/ext/mtwt.rs
index 33936e6213f..ae979020bc7 100644
--- a/src/libsyntax/ext/mtwt.rs
+++ b/src/libsyntax/ext/mtwt.rs
@@ -39,7 +39,7 @@ pub struct SCTable {
     rename_memo: RefCell<HashMap<(SyntaxContext,Ident,Name),SyntaxContext>>,
 }
 
-#[deriving(PartialEq, Encodable, Decodable, Hash, Show)]
+#[deriving(Copy, PartialEq, Encodable, Decodable, Hash, Show)]
 pub enum SyntaxContext_ {
     EmptyCtxt,
     Mark (Mrk,SyntaxContext),
@@ -56,8 +56,6 @@ pub enum SyntaxContext_ {
     IllegalCtxt
 }
 
-impl Copy for SyntaxContext_ {}
-
 /// A list of ident->name renamings
 pub type RenameList = Vec<(Ident, Name)>;