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Make it nicer from @alexandermerritt

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ubsan 2016-07-10 23:17:02 +02:00
parent 97003e5699
commit c0bee60adb
1 changed files with 6 additions and 5 deletions
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11
src/libcore/intrinsics.rs
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@ -339,11 +339,11 @@ extern "rust-intrinsic" {
/// # Alternatives
///
/// However, many uses of `transmute` can be achieved through other means.
/// This is unfortunate because either `transmute` isn't guaranteed to work
/// in that case, and only does because of rustc's current implemenation;
/// or, more commonly, `transmute` is just too powerful. It can transform
/// `transmute` can transform
/// any type into any other, with just the caveat that they're the same
/// size. Some more or less common uses, and a better way, are as follows:
/// size, and it sometimes results in interesting results. Below are common
/// applications of `transmute` which can be replaced with safe applications
/// of `as`:
///
/// Turning a pointer into a `usize`:
///
@ -374,7 +374,8 @@ extern "rust-intrinsic" {
/// let val_transmuted = unsafe {
/// std::mem::transmute::<&mut i32, &mut u32>(ptr)
/// };
/// // Now, put together `as` and reborrowing
/// // Now, put together `as` and reborrowing - note the chaining of `as`
/// // `as` is not transitive
/// let val_casts = unsafe { &mut *(ptr as *mut i32 as *mut u32) };
/// ```
///