auto merge of #17620 : nick29581/rust/slice4, r=aturon

cc @aturon 

r? anyone?

1 files changed, 32 insertions, 3 deletions

diff --git a/src/libcollections/string.rs b/src/libcollections/string.rs
index d6adbd30264..1032a504330 100644
--- a/src/libcollections/string.rs
+++ b/src/libcollections/string.rs
@@ -160,7 +160,7 @@ impl String {
 
         if i > 0 {
             unsafe {
-                res.as_mut_vec().push_all(v.slice_to(i))
+                res.as_mut_vec().push_all(v[..i])
             };
         }
 
@@ -177,7 +177,7 @@ impl String {
             macro_rules! error(() => ({
                 unsafe {
                     if subseqidx != i_ {
-                        res.as_mut_vec().push_all(v.slice(subseqidx, i_));
+                        res.as_mut_vec().push_all(v[subseqidx..i_]);
                     }
                     subseqidx = i;
                     res.as_mut_vec().push_all(REPLACEMENT);
@@ -246,7 +246,7 @@ impl String {
         }
         if subseqidx < total {
             unsafe {
-                res.as_mut_vec().push_all(v.slice(subseqidx, total))
+                res.as_mut_vec().push_all(v[subseqidx..total])
             };
         }
         Owned(res.into_string())
@@ -927,6 +927,7 @@ impl<S: Str> Add<S, String> for String {
     }
 }
 
+#[cfg(stage0)]
 impl ops::Slice<uint, str> for String {
     #[inline]
     fn as_slice_<'a>(&'a self) -> &'a str {
@@ -949,6 +950,34 @@ impl ops::Slice<uint, str> for String {
     }
 }
 
+#[cfg(not(stage0))]
+#[inline]
+fn str_to_slice<'a, U: Str>(this: &'a U) -> &'a str {
+    this.as_slice()
+}
+#[cfg(not(stage0))]
+impl ops::Slice<uint, str> for String {
+    #[inline]
+    fn as_slice<'a>(&'a self) -> &'a str {
+        str_to_slice(self)
+    }
+
+    #[inline]
+    fn slice_from<'a>(&'a self, from: &uint) -> &'a str {
+        self[][*from..]
+    }
+
+    #[inline]
+    fn slice_to<'a>(&'a self, to: &uint) -> &'a str {
+        self[][..*to]
+    }
+
+    #[inline]
+    fn slice<'a>(&'a self, from: &uint, to: &uint) -> &'a str {
+        self[][*from..*to]
+    }
+}
+
 /// Unsafe operations
 #[unstable = "waiting on raw module conventions"]
 pub mod raw {