// Each setting is name=value; for ints, name is short for name=1.
//
// If debugSSA is non-nil, any debug flags of the form ssa/... will be
// passed to debugSSA for processing.
func NewDebugFlag(debug interface{}, debugSSA DebugSSA) *DebugFlag {
	flag := &DebugFlag{
		tab:      make(map[string]debugField),
		debugSSA: debugSSA,
	}

	v := reflect.ValueOf(debug).Elem()
	t := v.Type()