sclass YesNoMaybe {
  O value; // null, Bool or Float (0=no, 1=yes)
  S comment;
  
  *() {}
  *(bool *value) {}
  *(Float *value) {}
  
  static YesNoMaybe yes() { ret YesNoMaybe(true); }
  static YesNoMaybe no() { ret YesNoMaybe(false); }
  static YesNoMaybe maybe() { ret YesNoMaybe(0.5f); }
  
  toString {
    if (eqOneOf(value, true, 1f)) ret "yes";
    if (eqOneOf(value, false, 0f)) ret "no";
    ret "maybe" + appendRoundBracketed(comment);
  }
}