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Improve safety warning on ptr::swap

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This commit is contained in:
Steve Klabnik 2017-01-07 13:41:16 -05:00
parent 3191886426
commit c547e08ce2
1 changed files with 4 additions and 1 deletions
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5
src/libcore/ptr.rs
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@ -74,7 +74,10 @@ pub const fn null_mut<T>() -> *mut T { 0 as *mut T }
/// ///
/// # Safety /// # 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, which means they will be dereferenced.
///
/// Ensure that these pointers are valid before calling `swap`.
#[inline] #[inline]
#[stable(feature = "rust1", since = "1.0.0")] #[stable(feature = "rust1", since = "1.0.0")]
pub unsafe fn swap<T>(x: *mut T, y: *mut T) { pub unsafe fn swap<T>(x: *mut T, y: *mut T) {