libcxx/test/std/utilities/memory/specialized.algorithms/specialized.addressof/constexpr_addressof.pass.cpp

//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++98, c++03, c++11, c++14
// XFAIL: gcc-5, gcc-6

// <memory>

// template <ObjectType T> constexpr T* addressof(T& r);

#include <memory>
#include <cassert>

#include "test_macros.h"

struct Pointer {
  constexpr Pointer(void* v) : value(v) {}
  void* value;
};

struct A
{
    constexpr A() : n(42) {}
    void operator&() const { }
    int n;
};

constexpr int i = 0;
constexpr double d = 0.0;
constexpr A a{};

int main(int, char**)
{
    static_assert(std::addressof(i) == &i, "");
    static_assert(std::addressof(d) == &d, "");
    constexpr const A* ap = std::addressof(a);
    static_assert(&ap->n == &a.n, "");

  return 0;
}