#define GTEST_REFERENCE_TO_CONST_(T) \
    GTEST_ADD_REFERENCE_(const GTEST_REMOVE_REFERENCE_(T))

// ImplicitlyConvertible<From, To>::value is a compile-time bool
// constant that's true iff type From can be implicitly converted to
// type To.
template <typename From, typename To>
class ImplicitlyConvertible {
 private:
  // We need the following helper functions only for their types.
  // They have no implementations.

#define GTEST_REFERENCE_TO_CONST_(T) \
    GTEST_ADD_REFERENCE_(const GTEST_REMOVE_REFERENCE_(T))

// ImplicitlyConvertible<From, To>::value is a compile-time bool
// constant that's true iff type From can be implicitly converted to
// type To.
template <typename From, typename To>
class ImplicitlyConvertible {
 private:
  // We need the following helper functions only for their types.
  // They have no implementations.

::std::basic_ostream<Char, CharTraits>& operator<<(
    ::std::basic_ostream<Char, CharTraits>& os, const T& x) {
  TypeWithoutFormatter<T,
      (internal::IsAProtocolMessage<T>::value ? kProtobuf :
       internal::ImplicitlyConvertible<const T&, internal::BiggestInt>::value ?
       kConvertibleToInteger : kOtherType)>::PrintValue(x, &os);
  return os;
}

}  // namespace internal2
}  // namespace testing

::std::basic_ostream<Char, CharTraits>& operator<<(
    ::std::basic_ostream<Char, CharTraits>& os, const T& x) {
  TypeWithoutFormatter<T,
      (internal::IsAProtocolMessage<T>::value ? kProtobuf :
       internal::ImplicitlyConvertible<const T&, internal::BiggestInt>::value ?
       kConvertibleToInteger : kOtherType)>::PrintValue(x, &os);
  return os;
}

}  // namespace internal2
}  // namespace testing