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| author | Björn Steinbrink <bsteinbr@gmail.com> | 2015-02-02 21:45:49 +0100 |
|---|---|---|
| committer | Björn Steinbrink <bsteinbr@gmail.com> | 2015-02-18 14:04:46 +0100 |
| commit | 52b5150cfd3dfcdf518675e9073f03e061a63a53 (patch) | |
| tree | f151c225b58184958d90227f805e383903f0db91 | |
| parent | dfc5c0f1e8799f47f9033bdcc8a7cd8a217620a5 (diff) | |
Avoid ptrtoint when checking if a pointer is null
Casting the pointer to an integer requires a ptrtoint, while casting 0 to a pointer is directly folded to a `null` value.
| -rw-r--r-- | src/libcore/ptr.rs | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/libcore/ptr.rs b/src/libcore/ptr.rs index 072c60c7036..2779e67c743 100644 --- a/src/libcore/ptr.rs +++ b/src/libcore/ptr.rs @@ -303,7 +303,7 @@ impl<T> PtrExt for *const T { #[inline] #[stable(feature = "rust1", since = "1.0.0")] - fn is_null(self) -> bool { self as usize == 0 } + fn is_null(self) -> bool { self == 0 as *const T } #[inline] #[stable(feature = "rust1", since = "1.0.0")] @@ -330,7 +330,7 @@ impl<T> PtrExt for *mut T { #[inline] #[stable(feature = "rust1", since = "1.0.0")] - fn is_null(self) -> bool { self as usize == 0 } + fn is_null(self) -> bool { self == 0 as *mut T } #[inline] #[stable(feature = "rust1", since = "1.0.0")] |