| 658 | } |
| 659 | |
| 660 | func isZero(v reflect.Value) bool { |
| 661 | kind := v.Kind() |
| 662 | if z, ok := v.Interface().(IsZeroer); ok { |
| 663 | if (kind == reflect.Ptr || kind == reflect.Interface) && v.IsNil() { |
| 664 | return true |
| 665 | } |
| 666 | return z.IsZero() |
| 667 | } |
| 668 | switch kind { |
| 669 | case reflect.String: |
| 670 | return len(v.String()) == 0 |
| 671 | case reflect.Interface, reflect.Ptr: |
| 672 | return v.IsNil() |
| 673 | case reflect.Slice: |
| 674 | return v.Len() == 0 |
| 675 | case reflect.Map: |
| 676 | return v.Len() == 0 |
| 677 | case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: |
| 678 | return v.Int() == 0 |
| 679 | case reflect.Float32, reflect.Float64: |
| 680 | return v.Float() == 0 |
| 681 | case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr: |
| 682 | return v.Uint() == 0 |
| 683 | case reflect.Bool: |
| 684 | return !v.Bool() |
| 685 | case reflect.Struct: |
| 686 | vt := v.Type() |
| 687 | for i := v.NumField() - 1; i >= 0; i-- { |
| 688 | if vt.Field(i).PkgPath != "" { |
| 689 | continue // Private field |
| 690 | } |
| 691 | if !isZero(v.Field(i)) { |
| 692 | return false |
| 693 | } |
| 694 | } |
| 695 | return true |
| 696 | } |
| 697 | return false |
| 698 | } |