json-validator/include/jvalidate/compat/compare.h

#pragma once

#include <compare> // IWYU pragma: keep
#include <version>

// Apple Clang does not properly support <=> in the STL - so we need to force it
#if __cpp_lib_three_way_comparison < 201907L
namespace std {
template <typename T> auto operator<=>(T const & lhs, T const & rhs) {
  if (lhs < rhs) {
    return std::strong_ordering::less;
  }
  if (lhs > rhs) {
    return std::strong_ordering::greater;
  }
  return std::strong_ordering::equal;
}
}
#endif