text: //===----------------------------------------------------------------------===//
  //
  // 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
  
  // <propagate_const>
  
  // template <class T> constexpr void propagate_const::swap(propagate_const<T>& x);
  
  #include <experimental/propagate_const>
  #include "test_macros.h"
  #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(int, char**) {
    typedef propagate_const<X> P;
    P p1(1);
    P p2(2);
    p1.swap(p2);
    assert(swap_called);
  
    return 0;
  }
  
  