Implement Clone for all types

Not just CFString

core-foundation/src/lib.rs

@@ -46,6 +46,15 @@ macro_rules! impl_TCFType {
             }
         }
 
+        impl Clone for $ty {
+            #[inline]
+            fn clone(&self) -> $ty {
+                unsafe {
+                    $ty::wrap_under_get_rule(self.0)
+                }
+            }
+        }
+
         impl PartialEq for $ty {
             #[inline]
             fn eq(&self, other: &$ty) -> bool {

core-foundation/src/string.rs

@@ -23,15 +23,6 @@ use std::ffi::CStr;
 /// An immutable string in one of a variety of encodings.
 pub struct CFString(CFStringRef);
 
-impl Clone for CFString {
-    #[inline]
-    fn clone(&self) -> CFString {
-        unsafe {
-            TCFType::wrap_under_get_rule(self.0)
-        }
-    }
-}
-
 impl Drop for CFString {
     fn drop(&mut self) {
         unsafe {