func CopyMap()

in response.go [258:292]

• 29 lines of code
• 7 McCabe index (conditional complexity)

func CopyMap(inMapValue, outMapValue reflect.Value) error {
	if inMapValue.IsNil() {
		return perrors.New("@in is nil")
	}
	if !inMapValue.CanInterface() {
		return perrors.New("@in's Interface can not be used.")
	}
	if inMapValue.Kind() != reflect.Map {
		return perrors.Errorf("@in is not map, but %v", inMapValue.Kind())
	}

	outMapType := UnpackPtrType(outMapValue.Type())
	SetValue(outMapValue, reflect.MakeMap(outMapType))

	outKeyType := outMapType.Key()

	outMapValue = UnpackPtrValue(outMapValue)
	outValueType := outMapValue.Type().Elem()

	for _, inKey := range inMapValue.MapKeys() {
		inValue := inMapValue.MapIndex(inKey)

		if !inKey.Type().AssignableTo(outKeyType) {
			return perrors.Errorf("in Key:{type:%s, value:%#v} can not assign to out Key:{type:%s} ",
				inKey.Type().String(), inKey, outKeyType.String())
		}
		if !inValue.Type().AssignableTo(outValueType) {
			return perrors.Errorf("in Value:{type:%s, value:%#v} can not assign to out value:{type:%s}",
				inValue.Type().String(), inValue, outValueType.String())
		}
		outMapValue.SetMapIndex(inKey, inValue)
	}

	return nil
}