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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <memory>
// template <class Ptr>
// struct pointer_traits
// {
// static pointer pointer_to(<details>);
// ...
// };
#include <memory>
#include <cassert>
#include <type_traits>
#include "test_macros.h"
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);
}
};
template <class Pointer>
void test() {
typename Pointer::element_type obj;
static_assert(std::is_same<Pointer, decltype(std::pointer_traits<Pointer>::pointer_to(obj))>::value, "");
Pointer p = std::pointer_traits<Pointer>::pointer_to(obj);
assert(p.t_ == &obj);
}
int main(int, char**) {
test<A<int> >();
test<A<long> >();
{ (std::pointer_traits<A<void> >::element_type)0; }
return 0;
}
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