Defined in header <new> | ||
---|---|---|
enum class align_val_t : std::size_t {}; | (since C++17) |
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.
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 | Comment |
---|---|---|---|
__cpp_aligned_new | 201606L | (C++17) | Dynamic memory allocation for over-aligned data |
allocation functions (function) |
|
deallocation functions (function) |
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