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Showing content from https://timsong-cpp.github.io/cppwp/n4140/pointer.traits.functions below:

[pointer.traits.functions]

20.7.3.2 Pointer traits member functions [pointer.traits.functions]

static pointer pointer_traits::pointer_to(see below r); static pointer pointer_traits<T*>::pointer_to(see below r) noexcept;

Remark: If element_type is (possibly cv-qualified) void, the type of r is unspecified; otherwise, it is element_type&.

Returns: The first member function returns a pointer to r obtained by calling Ptr::pointer_to(r) through which indirection is valid; an instantiation of this function is ill-formed if Ptr does not have a matching pointer_to static member function. The second member function returns std::addressof(r).


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