PM_io_parser(std::istream& is, Plane_map& H)
/*{\Mcreate creates an instance |\Mvar| of type |\Mname|
   to input |H| from |is|.}*/
    : Base(H), in(is), out(std::cout), verbose(0), vn(0), en(0), fn(0)
        { this->clear(); }
PM_io_parser(std::istream& is, Plane_map& H)
 
    : Base(H), in(is), out(std::cout), verbose(0), vn(0), en(0), fn(0)
        { this->clear(); }