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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <memory>
// template <class Ptr>
// struct pointer_traits
// {
// static pointer pointer_to(<details>);
// ...
// };
#include <memory>
#include <cassert>
template <class T>
struct A
{
private:
struct nat {};
public:
typedef T element_type;
element_type* t_;
A(element_type* t) : t_(t) {}
static A pointer_to(typename std::conditional<std::is_void<element_type>::value,
nat, element_type>::type& et)
{return A(&et);}
};
int main()
{
{
int i = 0;
A<int> a = std::pointer_traits<A<int> >::pointer_to(i);
assert(a.t_ == &i);
}
{
(std::pointer_traits<A<void> >::element_type)0;
}
}
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