1 files changed, 58 insertions, 69 deletions
diff --git a/src/libcore/slice.rs b/src/libcore/slice.rs
index b8828d310f0..68b3a3199df 100644
--- a/src/libcore/slice.rs
+++ b/src/libcore/slice.rs
@@ -61,32 +61,6 @@ use raw::Slice as RawSlice;
 /// Extension methods for immutable slices.
 #[unstable = "may merge with other traits; region parameter may disappear"]
 pub trait ImmutableSlice<'a, T> {
-    /// Returns a subslice spanning the interval [`start`, `end`).
-    ///
-    /// Fails when the end of the new slice lies beyond the end of the
-    /// original slice (i.e. when `end > self.len()`) or when `start > end`.
-    ///
-    /// Slicing with `start` equal to `end` yields an empty slice.
-    #[unstable = "waiting on final error conventions"]
-    //fn slice(&self, start: uint, end: uint) -> &'a [T];
-
-    /// Returns a subslice from `start` to the end of the slice.
-    ///
-    /// Fails when `start` is strictly greater than the length of the original slice.
-    ///
-    /// Slicing from `self.len()` yields an empty slice.
-    #[unstable = "waiting on final error conventions"]
-    // TODO
-    //fn slice_from(&self, start: uint) -> &'a [T];
-
-    /// Returns a subslice from the start of the slice to `end`.
-    ///
-    /// Fails when `end` is strictly greater than the length of the original slice.
-    ///
-    /// Slicing to `0` yields an empty slice.
-    #[unstable = "waiting on final error conventions"]
-    //fn slice_to(&self, end: uint) -> &'a [T];
-
     /// Divides one slice into two at an index.
     ///
     /// The first will contain all indices from `[0, mid)` (excluding
@@ -444,6 +418,35 @@ impl<'a,T> ImmutableSlice<'a, T> for &'a [T] {
     }
 }
 
+#[cfg(not(stage0))]
+impl<T> ops::Slice<uint, [T]> for [T] {
+    #[inline]
+    fn as_slice<'a>(&'a self) -> &'a [T] {
+        self
+    }
+
+    #[inline]
+    fn slice_from<'a>(&'a self, start: &uint) -> &'a [T] {
+        self.slice(start, &self.len())
+    }
+
+    #[inline]
+    fn slice_to<'a>(&'a self, end: &uint) -> &'a [T] {
+        self.slice(&0, end)
+    }
+    #[inline]
+    fn slice<'a>(&'a self, start: &uint, end: &uint) -> &'a [T] {
+        assert!(*start <= *end);
+        assert!(*end <= self.len());
+        unsafe {
+            transmute(RawSlice {
+                    data: self.as_ptr().offset(*start as int),
+                    len: (*end - *start)
+                })
+        }
+    }
+}
+#[cfg(stage0)]
 impl<T> ops::Slice<uint, [T]> for [T] {
     #[inline]
     fn as_slice_<'a>(&'a self) -> &'a [T] {
@@ -471,7 +474,36 @@ impl<T> ops::Slice<uint, [T]> for [T] {
         }
     }
 }
+#[cfg(not(stage0))]
+impl<T> ops::SliceMut<uint, [T]> for [T] {
+    #[inline]
+    fn as_mut_slice<'a>(&'a mut self) -> &'a mut [T] {
+        self
+    }
+
+    #[inline]
+    fn slice_from_mut<'a>(&'a mut self, start: &uint) -> &'a mut [T] {
+        let len = &self.len();
+        self.slice_mut(start, len)
+    }
 
+    #[inline]
+    fn slice_to_mut<'a>(&'a mut self, end: &uint) -> &'a mut [T] {
+        self.slice_mut(&0, end)
+    }
+    #[inline]
+    fn slice_mut<'a>(&'a mut self, start: &uint, end: &uint) -> &'a mut [T] {
+        assert!(*start <= *end);
+        assert!(*end <= self.len());
+        unsafe {
+            transmute(RawSlice {
+                    data: self.as_ptr().offset(*start as int),
+                    len: (*end - *start)
+                })
+        }
+    }
+}
+#[cfg(stage0)]
 impl<T> ops::SliceMut<uint, [T]> for [T] {
     #[inline]
     fn as_mut_slice_<'a>(&'a mut self) -> &'a mut [T] {
@@ -514,49 +546,6 @@ pub trait MutableSlice<'a, T> {
     #[deprecated = "use slicing syntax"]
     fn as_mut_slice(self) -> &'a mut [T];
 
-    /// Deprecated: use `slice_mut`.
-    #[deprecated = "use slicing syntax"]
-    //fn mut_slice(self, start: uint, end: uint) -> &'a mut [T] {
-    //    self[mut start..end]
-    //}
-
-    /// Returns a mutable subslice spanning the interval [`start`, `end`).
-    ///
-    /// Fails when the end of the new slice lies beyond the end of the
-    /// original slice (i.e. when `end > self.len()`) or when `start > end`.
-    ///
-    /// Slicing with `start` equal to `end` yields an empty slice.
-    #[unstable = "waiting on final error conventions"]
-    //fn slice_mut(self, start: uint, end: uint) -> &'a mut [T];
-
-    /// Deprecated: use `slicing syntax`.
-    #[deprecated = "use slicing syntax"]
-    //fn mut_slice_from(self, start: uint) -> &'a mut [T] {
-    //    self[mut start..]
-    //}
-
-    /// Returns a mutable subslice from `start` to the end of the slice.
-    ///
-    /// Fails when `start` is strictly greater than the length of the original slice.
-    ///
-    /// Slicing from `self.len()` yields an empty slice.
-    #[unstable = "waiting on final error conventions"]
-    //fn slice_from_mut(self, start: uint) -> &'a mut [T];
-
-    /// Deprecated: use `slicing syntax`.
-    #[deprecated = "use slicing syntax"]
-    //fn mut_slice_to(self, end: uint) -> &'a mut [T] {
-    //    self[mut ..end]
-    //}
-
-    /// Returns a mutable subslice from the start of the slice to `end`.
-    ///
-    /// Fails when `end` is strictly greater than the length of the original slice.
-    ///
-    /// Slicing to `0` yields an empty slice.
-    #[unstable = "waiting on final error conventions"]
-    //fn slice_to_mut(self, end: uint) -> &'a mut [T];
-
     /// Deprecated: use `iter_mut`.
     #[deprecated = "use iter_mut"]
     fn mut_iter(self) -> MutItems<'a, T> {