std::align_val_t

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< cpp‎ | memory‎ | new
 
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Low level memory management
 
Defined in header <new>
enum class align_val_t : std::size_t {};
 (since 哋它亢++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.

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 (哋它亢++17) Dynamic memory allocation for over-aligned data

See also

 allocation functions
(function)
deallocation functions
(function)
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