Golang - convert slice such as []string to []interface{}

slice.go

module slice

func InterfaceSlice(slice interface{}) []interface{} {
	switch slice := slice.(type) {
	case []string:
		new := make([]interface{}, len(slice))
		for i, v := range slice {
			new[i] = v
		}
		return new

	case []int:
		new := make([]interface{}, len(slice))
		for i, v := range slice {
			new[i] = v
		}
		return new

	default:
		sliceV := reflect.ValueOf(slice)
		if sliceV.Kind() != reflect.Slice {
			panic("InterfaceSlice() given a non-slice type")
		}

		// Keep the distinction between nil and empty slice input
		if sliceV.IsNil() {
			return nil
		}

		ret := make([]interface{}, sliceV.Len())

		for i := 0; i < sliceV.Len(); i++ {
			ret[i] = sliceV.Index(i).Interface()
		}

		return ret
	}
}