On Sun, Jun 21, 2020 at 2:11 PM Laevus Dexter <[email protected]> wrote:
>>
>> A receive expression used in an assignment or initialization of the special
>> form
>>
>> x, ok = <-ch
>> x, ok := <-ch
>> var x, ok = <-ch
>> var x, ok T = <-ch
>>
>> yields an additional untyped boolean result reporting whether the
>> communication succeeded. The value of ok is true if the value received was
>> delivered by a successful send operation to the channel, or false if it is a
>> zero value generated because the channel is closed and empty.
>
>
> Why it's untyped? And how to make the last expression to work? Seems I can't
> use anything but bool.
It's untyped mainly because there is no reason to make it typed.
You can use a different type by writing code like (untested):
type MyBool bool
func F(c chan int) {
var (
x int
ok MyBool
)
x, ok = <-c
}
Ian
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