Function forEachField

engine/pkg/util/projection/operations.go:84–120

(target interface{}, fn func(tag *fieldTag, field reflect.Value) error)

}

func forEachField(target interface{}, fn func(tag *fieldTag, field reflect.Value) error) error {
	value := reflect.Indirect(
		reflect.ValueOf(target),
	)

	if value.Kind() != reflect.Struct {
		return errors.Errorf("target must be a struct")
	}

	if !value.CanAddr() {
		return errors.Errorf("target must be addressable")
	}

	valueType := value.Type()
	num := value.NumField()

	for i := 0; i < num; i++ {
		field := value.Field(i)
		fieldType := valueType.Field(i)

		tag, err := getFieldTag(fieldType)
		if err != nil {
			return err
		}

		if tag == nil {
			continue
		}

		err = fn(tag, field)
		if err != nil {
			return err
		}
	}

	return nil
}