Function selectValue

selector.go:66–92

(c context.Context, key gval.Evaluable, r, v interface{})

}

func selectValue(c context.Context, key gval.Evaluable, r, v interface{}) (value interface{}, jkey string, err error) {
	c = currentContext(c, v)
	switch o := v.(type) {
	case []interface{}:
		i, err := key.EvalInt(c, r)
		if err != nil {
			return nil, "", fmt.Errorf("could not select value, invalid key: %s", err)
		}
		if i < 0 || i >= len(o) {
			return nil, "", fmt.Errorf("index %d out of bounds", i)
		}
		return o[i], strconv.Itoa(i), nil
	case map[string]interface{}:
		k, err := key.EvalString(c, r)
		if err != nil {
			return nil, "", fmt.Errorf("could not select value, invalid key: %s", err)
		}

		if r, ok := o[k]; ok {
			return r, k, nil
		}
		return nil, "", fmt.Errorf("unknown key %s", k)

	default:
		return nil, "", fmt.Errorf("unsupported value type %T for select, expected map[string]interface{} or []interface{}", o)
	}
}

//..
func mapperSelector() ambiguousSelector {