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Properly noexcept the destroy methods

master
Chris Robinson 2021-10-10 10:43:54 -07:00
parent 0e9ce1aa83
commit 8305973e7a
1 changed files with 6 additions and 5 deletions
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11
common/almalloc.h
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@ -102,11 +102,12 @@ template<typename T, std::size_t N, typename U, std::size_t M>
bool operator!=(const allocator<T,N>&, const allocator<U,M>&) noexcept { return false; }
template<size_t alignment, typename T>
[[gnu::assume_aligned(alignment)]] inline T* assume_aligned(T *ptr) noexcept { return ptr; }
[[gnu::assume_aligned(alignment)]] constexpr T* assume_aligned(T *ptr) noexcept { return ptr; }
template<typename T, typename ...Args>
constexpr T* construct_at(T *ptr, Args&&...args) noexcept(noexcept(T{std::forward<Args>(args)...}))
constexpr T* construct_at(T *ptr, Args&& ...args)
noexcept(std::is_nothrow_constructible<T, Args...>::value)
{ return ::new(static_cast<void*>(ptr)) T{std::forward<Args>(args)...}; }
/* At least VS 2015 complains that 'ptr' is unused when the given type's
@ -121,14 +122,14 @@ destroy_at(T *ptr) noexcept(std::is_nothrow_destructible<T>::value)
DIAGNOSTIC_POP
template<typename T>
constexpr std::enable_if_t<std::is_array<T>::value>
destroy_at(T *ptr) noexcept(std::is_nothrow_destructible<T>::value)
destroy_at(T *ptr) noexcept(std::is_nothrow_destructible<std::remove_all_extents_t<T>>::value)
{
for(auto &elem : *ptr)
al::destroy_at(std::addressof(elem));
}
template<typename T>
constexpr void destroy(T first, T end)
constexpr void destroy(T first, T end) noexcept(noexcept(al::destroy_at(std::addressof(*first))))
{
while(first != end)
{
@ -139,7 +140,7 @@ constexpr void destroy(T first, T end)
template<typename T, typename N>
constexpr std::enable_if_t<std::is_integral<N>::value,T>
destroy_n(T first, N count)
destroy_n(T first, N count) noexcept(noexcept(al::destroy_at(std::addressof(*first))))
{
if(count != 0)
{