message: Fix stream<T>::operator==
diff: @@ -84,6 +84,12 @@ private:
  stream_handler_ptr ptr_;
  };
  +/// @relates stream
  +template <class T>
  +inline bool operator==(const stream<T>& x, const stream<T>& y) {
  + return x.id() == y.id();
  +}
  +
  /// @relates stream
  constexpr invalid_stream_t invalid_stream = invalid_stream_t{};
  