20 General utilities library [utilities]

20.10 Memory [memory]

20.10.3 Pointer traits [pointer.traits] General [pointer.traits.general]

The class template pointer_­traits supplies a uniform interface to certain attributes of pointer-like types.
namespace std { template<class Ptr> struct pointer_traits { using pointer = Ptr; using element_type = see below; using difference_type = see below; template<class U> using rebind = see below; static pointer pointer_to(see below r); }; template<class T> struct pointer_traits<T*> { using pointer = T*; using element_type = T; using difference_type = ptrdiff_t; template<class U> using rebind = U*; static constexpr pointer pointer_to(see below r) noexcept; }; }