//===----------------------------------------------------------------------===//
//
//                     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.
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++98, c++03, c++11

// <propagate_const>

// element_type& propagate_const::operator*();

#include <experimental/propagate_const>
#include "propagate_const_helpers.h"
#include <cassert>

using std::experimental::propagate_const;

typedef propagate_const<X> P;

constexpr P f()
{
  P p(1);
  *p = 2;
  return p;
}

int main() {
  constexpr P p = f();
  static_assert(*p==2,"");
}