fuck.go

// PushType represents a value that can be pushed into the hierarchy.
type PushType map[string]interface{}

func init() {
        gob.Register(PushType{})
}

var errBadPushCast = errors.New("bad push cast")

// go is so fucking stupid
func castToPushType(val interface{}) (PushType, error) {
        var p PushType
        if mapVal, ok := val.(map[string]interface{}); ok {
                for k, v := range mapVal {
                        p[k] = v
                }
                return p, nil
        }
        return p, errBadPushCast
}

You could do something like:

func castToPushType(val interface{}) (PushType, error) {
	if mapVal, ok := val.(map[string]interface{}); ok {
		return PushType(mapVal), nil
	}

	return nil, errBadPushCast
}