---

yaml
---
r: 40319
b: refs/heads/dist-snap
c: a54d046
h: refs/heads/master
i:
  40317: a80c2a2
  40315: 31c80d6
  40311: 5bc1aae
  40303: 3df4b89
  40287: f89a97d
  40255: 61dd9ff
  40191: 367ab00
v: v3

Author: z0w0

[refs]

@@ -7,7 +7,7 @@ refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
 refs/heads/try2: a810c03263670238bccd64cabb12a23a46e3a278
 refs/heads/incoming: e90142e536c150df0d9b4b2f11352152177509b5
-refs/heads/dist-snap: 92e3a8c17e9b7cb61b18791aea0544794a315bbb
+refs/heads/dist-snap: a54d04617413322e434f6eb6c0a786d61c2f8329
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503
 refs/heads/try3: 9387340aab40a73e8424c48fd42f0c521a4875c0

branches/dist-snap/src/libcore/ptr.rs

@@ -176,7 +176,7 @@ pub trait Ptr<T> {
     pure fn offset(count: uint) -> self;
 }
 
-/// Extension methods for pointers
+/// Extension methods for immutable pointers
 impl<T> *T: Ptr<T> {
     /// Returns true if the pointer is equal to the null pointer.
     #[inline(always)]
@@ -191,6 +191,21 @@ impl<T> *T: Ptr<T> {
     pure fn offset(count: uint) -> *T { offset(self, count) }
 }
 
+/// Extension methods for mutable pointers
+impl<T> *mut T: Ptr<T> {
+    /// Returns true if the pointer is equal to the null pointer.
+    #[inline(always)]
+    pure fn is_null() -> bool { is_null(self) }
+
+    /// Returns true if the pointer is not equal to the null pointer.
+    #[inline(always)]
+    pure fn is_not_null() -> bool { is_not_null(self) }
+
+    /// Calculates the offset from a mutable pointer.
+    #[inline(always)]
+    pure fn offset(count: uint) -> *mut T { mut_offset(self, count) }
+}
+
 // Equality for pointers
 impl<T> *const T : Eq {
     pure fn eq(other: &*const T) -> bool unsafe {
@@ -311,4 +326,12 @@ pub fn test_is_null() {
    let q = ptr::offset(p, 1u);
    assert !q.is_null();
    assert q.is_not_null();
+
+   let mp: *mut int = ptr::mut_null();
+   assert mp.is_null();
+   assert !mp.is_not_null();
+
+   let mq = mp.offset(1u);
+   assert !mq.is_null();
+   assert mq.is_not_null();
 }