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++03, c++11, c++14, c++17
  // UNSUPPORTED: libcpp-no-concepts
  
  // constexpr auto operator->() const noexcept
  //   requires contiguous_iterator<I>;
  
  #include <iterator>
  
  #include "test_macros.h"
  #include "test_iterators.h"
  
  template<class Iter>
  concept ArrowEnabled = requires(Iter& iter) {
    iter.operator->();
  };
  
  constexpr bool test() {
    int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
  
    {
      std::counted_iterator iter(contiguous_iterator<int*>{buffer}, 8);
      for (int i = 0; i < 8; ++i, ++iter)
        assert(iter.operator->() == buffer + i);
  
      static_assert(noexcept(iter.operator->()));
    }
    {
      const std::counted_iterator iter(contiguous_iterator<int*>{buffer}, 8);
      assert(iter.operator->() == buffer);
  
      static_assert(noexcept(iter.operator->()));
    }
  
    {
        static_assert( ArrowEnabled<std::counted_iterator<contiguous_iterator<int*>>>);
        static_assert(!ArrowEnabled<std::counted_iterator<random_access_iterator<int*>>>);
    }
  
    return true;
  }
  
  int main(int, char**) {
    test();
    static_assert(test());
  
    return 0;
  }
  