std::allocation_result
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allocation_result
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Defined in header
<memory>
template< class Pointer, class SizeType = std::size_t >
struct allocation_result;
(since C++23)
struct allocation_result;
allocation_result specializations are returned from the allocate_at_least member function of appropriate Allocator types (e.g. std::allocator::allocate_at_least) and std::allocator_traits::allocate_at_least.
Every specialization of allocation_result has no base classes or declared members other than ptr and count, thus it is suitable for aggregate initialization and structured binding.
[edit] Template parameters
[edit] Data members
Member name
Definition
ptr
Pointer which is typically used for the address of the first element in the storage allocated by allocate_at_least (public member object)
count
SizeType which is typically used for the actual number of elements in the storage allocated by allocate_at_least (public member object)
[edit] Notes
Pointer and SizeType are a pointer to an object type and std::make_unsigned_t <std::ptrdiff_t > (which is almost always same as std::size_t ) by default.
| Feature-test macro | Value | Std | Feature |
|---|---|---|---|
__cpp_lib_allocate_at_least |
202302L |
(C++23) | Size-feedback in the Allocator interface |
[edit] Example
This section is incomplete
Reason: no example
Reason: no example
[edit] See also
(C++23)
(public member function of
std::allocator<T>) [edit]
[static] (C++23)
(public static member function of
std::allocator_traits<Alloc>) [edit]