message: Xcode 14 still doesn't know about spaceship operator...
diff: // Copyright (c) 2018-present The Alive2 Authors.
  // Distributed under the MIT license that can be found in the LICENSE file.
  -#if defined(__clang__) && __clang_major__ < 14
  +#if defined(__clang__) && __clang_major__ < 15 && defined(__APPLE__)
  #include <compare>
  -#ifdef __APPLE__
  namespace std {
  inline bool is_neq(std::weak_ordering o) { return o != 0; }
  }
  -#endif
  namespace {
  @@ -24,21 +22,7 @@ std::weak_ordering operator<=>(const std::string &lhs, const std::string &rhs) {
  }
  template <typename T>
  -#ifdef __APPLE__
  std::weak_ordering compare_iterators(T &&I, const T &E, T &&II, const T &EE);
  -#else
  -std::weak_ordering compare_iterators(T &&I, const T &E, T &&II, const T &EE) {
  - while (I != E && II != EE) {
  - auto cmp = *I <=> *II;
  - if (std::is_neq(cmp))
  - return cmp;
  - ++I, ++II;
  - }
  - if (I == E)
  - return II == EE ? std::weak_ordering::equivalent : std::weak_ordering::less;
  - return std::weak_ordering::greater;
  -}
  -#endif
  template <typename T>
  std::weak_ordering operator<=>(const std::vector<T> &lhs,
  @@ -66,7 +50,6 @@ std::weak_ordering operator<=>(const std::pair<X,Y> &lhs,
  return lhs.second <=> rhs.second;
  }
  -#ifdef __APPLE__
  template <typename T>
  std::weak_ordering compare_iterators(T &&I, const T &E, T &&II, const T &EE) {
  while (I != E && II != EE) {
  @@ -79,7 +62,6 @@ std::weak_ordering compare_iterators(T &&I, const T &E, T &&II, const T &EE) {
  return II == EE ? std::weak_ordering::equivalent : std::weak_ordering::less;
  return std::weak_ordering::greater;
  }
  -#endif
  }
  