You can use a function call to do the cast:
func byteErr2stringErr(b []byte, e error) (string, error) {
return string(b), e
}
content, err := byteErr2stringErr(os.ReadFile(path))
It's still using additional variables, but they are hidden inside the
helper function.
On Sunday, May 16, 2021 at 8:07:24 PM UTC-7 Kurtis Rader wrote:
> On Sun, May 16, 2021 at 7:49 PM 'Marc Michael' via golang-nuts <
> golan...@googlegroups.com> wrote:
>
>> as Go provides multi values I would expect that's possible to cast such a
>> multi value. Do I see it correctly, that Go does not provide it?
>>
>> Example:
>>
>> os.ReadFile returns []byte, error.
>> I want to cast the []byte to a string.
>>
>> content, err := os.ReadFile(path)
>>
>> Is it possible to cast the []byte directly to a string without using a
>> second variable?
>>
>
> No, it is not possible to transform the type of one return value in a
> multi-valued
> expression such as a function call. Such syntactic sugar would have limited
> usefulness and, in my opinion, is likely to decrease readability and thus
> be a source of bugs. If you find yourself needing to perform such
> conversions so often that such a feature is useful that suggests the APIs
> you're using need to be changed.
>
> --
> Kurtis Rader
> Caretaker of the exceptional canines Junior and Hank
>
--
You received this message because you are subscribed to the Google Groups
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to golang-nuts+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/golang-nuts/eca8c069-5537-43ae-969c-cb334b7d7484n%40googlegroups.com.
