diff options
| -rw-r--r-- | src/libcore/ptr.rs | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/libcore/ptr.rs b/src/libcore/ptr.rs index e3ca8eca76c..bf5a59c45e4 100644 --- a/src/libcore/ptr.rs +++ b/src/libcore/ptr.rs @@ -74,7 +74,10 @@ pub const fn null_mut<T>() -> *mut T { 0 as *mut T } /// /// # Safety /// -/// This is only unsafe because it accepts a raw pointer. +/// This function copies the memory through the raw pointers passed to it +/// as arguments. +/// +/// Ensure that these pointers are valid before calling `swap`. #[inline] #[stable(feature = "rust1", since = "1.0.0")] pub unsafe fn swap<T>(x: *mut T, y: *mut T) { |