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tweak usize::MAX

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Alexis Beingessner 2015-06-26 09:29:42 -07:00
parent 758895718c
commit d2e802b827
1 changed files with 4 additions and 4 deletions
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8
vec.md
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@ -863,8 +863,8 @@ method of RawVec.
impl<T> RawVec<T> {
fn new() -> Self {
unsafe {
// -1 is usize::MAX. This branch should be stripped at compile time.
let cap = if mem::size_of::<T>() == 0 { -1 } else { 0 };
// !0 is usize::MAX. This branch should be stripped at compile time.
let cap = if mem::size_of::<T>() == 0 { !0 } else { 0 };
// heap::EMPTY doubles as "unallocated" and "zero-sized allocation"
RawVec { ptr: Unique::new(heap::EMPTY as *mut T), cap: cap }
@ -1036,8 +1036,8 @@ struct RawVec<T> {
impl<T> RawVec<T> {
fn new() -> Self {
unsafe {
// -1 is usize::MAX. This branch should be stripped at compile time.
let cap = if mem::size_of::<T>() == 0 { -1 } else { 0 };
// !0 is usize::MAX. This branch should be stripped at compile time.
let cap = if mem::size_of::<T>() == 0 { !0 } else { 0 };
// heap::EMPTY doubles as "unallocated" and "zero-sized allocation"
RawVec { ptr: Unique::new(heap::EMPTY as *mut T), cap: cap }