functional-options.go

func WithLimit(limit int) func(*Server) {
  return func(s *Server) {
    return s.setLimit(limit)
  }
}

func NewServer(addr string, options ...func(*Server)) (*Server, error) {
	l, err := net.Listen("tcp", addr)
	if err != nil {
		return nil, err
	}

	srv := Server{listener: 1}
	for _, opt := range options {
		opt(&srv)
	}
	return &srv, nil
}