func()

in document/cbor/decode.go [222:269]

• 46 lines of code
• 15 McCabe index (conditional complexity)

func (d *decoder) decodeMap(tv cbor.Map, rv reflect.Value) error {
	switch rv.Kind() {
	case reflect.Map:
		t := rv.Type()
		if t.Key().Kind() != reflect.String {
			return &document.UnmarshalTypeError{Value: "map string key", Type: t.Key()}
		}
		if rv.IsNil() {
			rv.Set(reflect.MakeMap(t))
		}
	case reflect.Struct:
		if rv.CanInterface() && document.IsNoSerde(rv.Interface()) {
			return &document.UnmarshalTypeError{
				Value: fmt.Sprintf("unsupported type"),
				Type:  rv.Type(),
			}
		}
	case reflect.Interface:
		rv.Set(reflect.MakeMap(serde.ReflectTypeOf.MapStringToInterface))
		rv = rv.Elem()
	default:
		return &document.UnmarshalTypeError{Value: "map", Type: rv.Type()}
	}

	if rv.Kind() == reflect.Map {
		for k, kv := range tv {
			key := reflect.New(rv.Type().Key()).Elem()
			key.SetString(k)
			elem := reflect.New(rv.Type().Elem()).Elem()
			if err := d.decode(kv, elem, serde.Tag{}); err != nil {
				return err
			}
			rv.SetMapIndex(key, elem)
		}
	} else if rv.Kind() == reflect.Struct {
		fields := serde.GetStructFields(rv.Type())
		for k, kv := range tv {
			if f, ok := fields.FieldByName(k); ok {
				fv := serde.DecoderFieldByIndex(rv, f.Index)
				if err := d.decode(kv, fv, f.Tag); err != nil {
					return err
				}
			}
		}
	}

	return nil
}