---

yaml
---
r: 29767
b: refs/heads/incoming
c: 6c4843d
h: refs/heads/master
i:
  29765: 21e6709
  29763: 4e207f1
  29759: 8f32114
v: v3

Author: bblum

[refs]

@@ -6,7 +6,7 @@ refs/heads/try: d324a424d8f84b1eb049b12cf34182bda91b0024
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
 refs/heads/try2: d0c6ce338884ee21843f4b40bf6bf18d222ce5df
-refs/heads/incoming: 3dbce4ebea8b36c873b1b29e5a56d5a8b86feee6
+refs/heads/incoming: 6c4843d9da70aeb402fc788e07e7912ecbee3559
 refs/heads/dist-snap: 2f32a1581f522e524009138b33b1c7049ced668d
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/incoming/src/libcore/ptr.rs

@@ -13,9 +13,9 @@ export memcpy;
 export memmove;
 export memset;
 export to_uint;
+export ref_eq;
 export buf_len;
 export position;
-export extensions;
 export ptr;
 
 import libc::{c_void, size_t};
@@ -150,6 +150,12 @@ fn to_uint<T>(thing: &T) -> uint unsafe {
     unsafe::reinterpret_cast(thing)
 }
 
+/// Determine if two borrowed pointers point to the same thing.
+#[inline(always)]
+fn ref_eq<T>(thing: &T, other: &T) -> bool {
+    to_uint(thing) == to_uint(other)
+}
+
 trait ptr {
     pure fn is_null() -> bool;
     pure fn is_not_null() -> bool;
@@ -236,4 +242,4 @@ fn test_is_null() {
    let q = ptr::offset(p, 1u);
    assert !q.is_null();
    assert q.is_not_null();
-}
+}