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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.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11
// <propagate_const>
// template <class T> constexpr void swap(propagate_const<T>& x, propagate_const<T>& y);
#include <experimental/propagate_const>
#include "propagate_const_helpers.h"
#include <cassert>
using std::experimental::propagate_const;
bool swap_called = false;
void swap(X &, X &) { swap_called = true; }
int main() {
typedef propagate_const<X> P;
P p1(1);
P p2(2);
swap(p1, p2);
assert(swap_called);
}
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