| 6 | ) |
| 7 | |
| 8 | func deepCopy(dst, src reflect.Value) { |
| 9 | switch src.Kind() { |
| 10 | case reflect.Interface: |
| 11 | value := src.Elem() |
| 12 | if !value.IsValid() { |
| 13 | return |
| 14 | } |
| 15 | newValue := reflect.New(value.Type()).Elem() |
| 16 | deepCopy(newValue, value) |
| 17 | dst.Set(newValue) |
| 18 | case reflect.Ptr: |
| 19 | value := src.Elem() |
| 20 | if !value.IsValid() { |
| 21 | return |
| 22 | } |
| 23 | dst.Set(reflect.New(value.Type())) |
| 24 | deepCopy(dst.Elem(), value) |
| 25 | case reflect.Map: |
| 26 | dst.Set(reflect.MakeMap(src.Type())) |
| 27 | keys := src.MapKeys() |
| 28 | for _, key := range keys { |
| 29 | value := src.MapIndex(key) |
| 30 | newValue := reflect.New(value.Type()).Elem() |
| 31 | deepCopy(newValue, value) |
| 32 | dst.SetMapIndex(key, newValue) |
| 33 | } |
| 34 | case reflect.Slice: |
| 35 | dst.Set(reflect.MakeSlice(src.Type(), src.Len(), src.Cap())) |
| 36 | for i := 0; i < src.Len(); i++ { |
| 37 | deepCopy(dst.Index(i), src.Index(i)) |
| 38 | } |
| 39 | case reflect.Struct: |
| 40 | typeSrc := src.Type() |
| 41 | for i := 0; i < src.NumField(); i++ { |
| 42 | value := src.Field(i) |
| 43 | tag := typeSrc.Field(i).Tag |
| 44 | if value.CanSet() && tag.Get("deepcopy") != "-" { |
| 45 | deepCopy(dst.Field(i), value) |
| 46 | } |
| 47 | } |
| 48 | default: |
| 49 | dst.Set(src) |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | func DeepCopy(dst, src interface{}) { |
| 54 | typeDst := reflect.TypeOf(dst) |