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A better core::mem::dropped implementation suggested by huonw on the PR.

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This commit is contained in:
Felix S. Klock II 2015-03-23 23:52:21 +01:00
parent 5bc35b1852
commit 5733726508
1 changed files with 9 additions and 6 deletions
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15
src/libcore/mem.rs
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@ -173,12 +173,15 @@ pub unsafe fn zeroed<T>() -> T {
#[inline]
#[unstable(feature = "filling_drop")]
pub unsafe fn dropped<T>() -> T {
let mut x: T = uninitialized();
let p: *mut u8 = transmute(&mut x as *mut T);
for i in 0..size_of::<T>() {
*p.offset(i as isize) = POST_DROP_U8;
}
x
#[cfg(stage0)]
#[inline(always)]
unsafe fn dropped_impl<T>() -> T { zeroed() }
#[cfg(not(stage0))]
#[inline(always)]
unsafe fn dropped_impl<T>() -> T { intrinsics::init_dropped() }
dropped_impl()
}
/// Create an uninitialized value.