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This commit is contained in:
Ralf Jung 2018-07-11 21:36:50 +02:00
parent 86369c3ad4
commit c7d90d1a50
1 changed files with 3 additions and 2 deletions
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5
src/libcore/slice/mod.rs
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@ -2353,6 +2353,7 @@ macro_rules! iterator {
#[inline(always)]
unsafe fn post_inc_start(&mut self, offset: isize) -> * $raw_mut T {
if mem::size_of::<T>() == 0 {
// This is *reducing* the length. `ptr` never changes with ZST.
self.end = (self.end as isize).wrapping_sub(offset) as * $raw_mut T;
self.ptr
} else {
@ -2434,8 +2435,8 @@ macro_rules! iterator {
// This iterator is now empty. The way we encode the length of a non-ZST
// iterator, this works for both ZST and non-ZST.
// For a ZST we would usually do `self.end = self.ptr`, but since
// we will not give out an address any more after this there is no
// way to observe the difference.
// we will not give out an reference any more after this there is no
// way to observe the difference except for raw pointers.
self.ptr = self.end;
return None;
}