std::align_val_t - cppreference.com (original) (raw)
Both new-expression and delete-expression, when used with objects whose alignment requirement is greater than __STDCPP_DEFAULT_NEW_ALIGNMENT__, pass that alignment requirement as an argument of type std::align_val_t to the selected allocation/deallocation function.
[edit] Notes
Alignment (as obtained by alignof) has the type std::size_t, but placement forms of allocation and deallocation functions that take std::size_t as an additional parameter are already in use, so this type is used instead.
| Feature-test macro | Value | Std | Feature |
|---|---|---|---|
| __cpp_aligned_new | 201606L | (C++17) | Dynamic memory allocation for over-aligned data |