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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

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