std::experimental::pmr::memory_resource::do_allocate

From cppreference.com
virtual void * do_allocate( std::size_t bytes, std::size_t alignment ) = 0 ;
(library fundamentals TS)

Allocates storage with a size of at least bytes bytes. The returned storage is aligned to the specified alignment if such alignment is supported, and to alignof(std::max_align_t)

alignment shall be a power of two.

Exceptions

Throws an exception if storage of the requested size and alignment cannot be obtained.

See also

allocates memory
(public member function)