Dynamic memory management
Uninitialized memory algorithms
Constrained uninitialized memory algorithms
Garbage collection support
(C++11)(until C++23)
(C++11)(until C++23)
(C++11)(until C++23)
(C++11)(until C++23)
(C++11)(until C++23)
(C++11)(until C++23)

[[nodiscard]] void* allocate_bytes( std::size_t nbytes,
                                    std::size_t alignment = alignof(std::max_align_t) );
(since C++20)

Allocates nbytes bytes of storage at specified alignment alignment using the underlying memory resource. Equivalent to return resource()->allocate(nbytes, alignment);.


[edit] Parameters

nbytes - the number of bytes to allocate
alignment - the alignment to use

[edit] Return value

A pointer to the allocated storage.

[edit] Notes

This function was introduced for use with the fully-specialized allocator std::pmr::polymorphic_allocator<>, but it may be useful in any specialization.

The return type is void* (rather than, e.g., std::byte*) to support conversion to an arbitrary pointer type U* by static_cast<U*>.

[edit] Exceptions

May throw any exceptions thrown by the call to resource()->allocate.

[edit] See also

allocates raw memory suitable for an object or an array
(public member function) [edit]
allocates and constructs an object
(public member function) [edit]
allocate memory
(public member function) [edit]
allocates uninitialized storage using the allocator
(public static member function of std::allocator_traits<Alloc>) [edit]
allocates memory
(public member function of std::pmr::memory_resource) [edit]