---

yaml
---
r: 15593
b: refs/heads/try
c: 43061f3
h: refs/heads/master
i:
  15591: 5b5ad53
v: v3

Author: graydon

[refs]

@@ -2,5 +2,5 @@
 refs/heads/master: 61b1875c16de39c166b0f4d54bba19f9c6777d1a
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: 4a81779abd786ff22d71434c6d9a5917ea4cdfff
-refs/heads/try: 14d050969131b14dbf625865fb061e3fb7072a18
+refs/heads/try: 43061f3969d1d961bd4e4d57c06452ca80c1adb6
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105

branches/try/src/libcore/str.rs

@@ -20,6 +20,7 @@ export
    as_bytes,
    as_buf,
    as_c_str,
+   unpack_slice,
 
    // Adding things to and removing things from a string
    push_char,

branches/try/src/libcore/vec.rs

@@ -71,6 +71,7 @@ export permute;
 export windowed;
 export as_buf;
 export as_mut_buf;
+export unpack_slice;
 export unsafe;
 export u8;
 export extensions;
@@ -954,6 +955,15 @@ fn as_mut_buf<E,T>(v: [mut E], f: fn(*mut E) -> T) -> T unsafe {
     let buf = unsafe::to_ptr(v) as *mut E; f(buf)
 }
 
+#[doc = "
+Work with the buffer and length of a slice.
+"]
+fn unpack_slice<T,U>(s: [const T]/&, f: fn(*T, uint) -> U) -> U unsafe {
+    let v : *(*T,uint) = ::unsafe::reinterpret_cast(ptr::addr_of(s));
+    let (buf,len) = *v;
+    f(buf, len / sys::size_of::<T>())
+}
+
 #[doc = "Extension methods for vectors"]
 impl extensions<T> for [const T] {
     #[doc = "