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Auto merge of #38910 - steveklabnik:update_docs, r=eddyb

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Improve safety warning on ptr::swap

r? @eddyb @bluss , who I asked about this on IRC
This commit is contained in:
bors 2017-01-09 02:59:33 +00:00
commit aee21e2594
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
///
/// 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) {