core: derive Clone for core types

src/libcore/core.rc

@@ -231,6 +231,7 @@ pub mod rt;
 // can be resolved within libcore.
 #[doc(hidden)]
 pub mod core {
+    pub use clone;
     pub use cmp;
     pub use condition;
     pub use option;

src/libcore/either.rs

@@ -17,7 +17,7 @@
 use vec;
 
 /// The either type
-#[deriving(Eq)]
+#[deriving(Clone, Eq)]
 pub enum Either<T, U> {
     Left(T),
     Right(U)

src/libcore/option.rs

@@ -52,7 +52,7 @@
 #[cfg(test)] use str;
 
 /// The option type
-#[deriving(Eq)]
+#[deriving(Clone, Eq)]
 pub enum Option<T> {
     None,
     Some(T),

src/libcore/path.rs

@@ -20,7 +20,7 @@
 use str;
 use to_str::ToStr;
 
-#[deriving(Eq)]
+#[deriving(Clone, Eq)]
 pub struct WindowsPath {
     host: Option<~str>,
     device: Option<~str>,
@@ -32,7 +32,7 @@ pub fn WindowsPath(s: &str) -> WindowsPath {
     GenericPath::from_str(s)
 }
 
-#[deriving(Eq)]
+#[deriving(Clone, Eq)]
 pub struct PosixPath {
     is_absolute: bool,
     components: ~[~str],

src/libcore/result.rs

@@ -20,7 +20,7 @@
 use vec;
 
 /// The result type
-#[deriving(Eq)]
+#[deriving(Clone, Eq)]
 pub enum Result<T, U> {
     /// Contains the successful result value
     Ok(T),