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Allow slice null ptr safely if slice is empty

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This commit is contained in:
David Tolnay 2021-03-28 02:00:02 -04:00
parent 96ee470356
commit bb98d9eb09
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GPG Key ID: F9BA143B95FF6D82
1 changed files with 6 additions and 2 deletions
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8
include/cxx.h
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@ -505,8 +505,12 @@ Slice<T>::Slice() noexcept {
template <typename T>
Slice<T>::Slice(T *s, std::size_t count) noexcept {
assert(s != nullptr);
sliceInit(this, const_cast<typename std::remove_const<T>::type *>(s), count);
assert(s != nullptr || count == 0);
sliceInit(this,
s == nullptr && count == 0
? reinterpret_cast<void *>(align_of<T>())
: const_cast<typename std::remove_const<T>::type *>(s),
count);
}
template <typename T>