std::scoped_allocator_adaptor<OuterAlloc,InnerAlloc...>::allocate

Since C++20

// 1)
[[nodiscard]] pointer allocate( size_type n );
// 2)
[[nodiscard]] pointer allocate( size_type n, const_void_pointer hint );

Since C++11, Until C++20

// 1)
pointer allocate( size_type n );
// 2)
pointer allocate( size_type n, const_void_pointer hint );

Uses the outer allocator to allocate uninitialized storage.

1. Calls std::allocator_traits<OuterAlloc>::allocate(outer_allocator(), n)
   
2. Additionally provides memory locality hint, by calling std::allocator_traits<OuterAlloc>::allocate(outer_allocator(), n, hint)

Parameters

n - the number of objects to allocate storage for
hint - pointer to a nearby memory location

Return value

The pointer to the allocated storage