std::pmr::polymorphic_allocator<T>::allocate_bytes (3) - Linux Man Pages
void* allocate_bytes( std::size_t nbytes, (since C++20)
std::size_t alignment = alignof(std::max_align_t) );
Allocates nbytes bytes of storage at specified alignment alignment using the underlying memory resource. Equivalent to return resource()->allocate(nbytes, alignment);
nbytes - the number of bytes to allocate
alignment - the alignment to use
A pointer to the allocated storage.
This function was introduced for use with the fully-specialized allocator std::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*>.
May throw any exceptions thrown by the call to resource()->allocate.
allocate_object Allocates raw memory suitable for an object or an array
new_object Allocates and constructs an object
allocate (public member function)
allocate allocates uninitialized storage using the allocator
allocate (public member function of std::pmr::memory_resource)