On 2018-01-12 19:09, 'Axel Wagner' via golang-nuts wrote:
> One would think the result is rather well defined.
>
>
> It's not. The value in the interface doesn't have to be a pointer, so
> this is, in general, not defined at all.
No, but it's not like you cannot ask about interface{} in general.
I can do a type switch, asking:
func f(i interface{}) int {
switch t := i.(type) {
case int:
return t
default:
return 0
}
}
Now I just wondered how to do something like a parameterized version of
that:
func f(i interface{}) o interface{} {
switch t := i.(type) {
case **<Something>:
o = *t
default:
o = nil
}
return
}
When you say "well defined" you refer to that an interface{} can be
anything until you do reflection or type assertion.
When I say "well defined", I speak of whether it's in general is
ambiguous what is meant.
/Peter
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