On Thursday, August 4, 2016 at 2:19:06 PM UTC+8, Jesse McNelis wrote:
>
> On Thu, Aug 4, 2016 at 3:33 PM, T L <[email protected] <javascript:>>
> wrote:
> >
> > With some special memory optimizations for slice, I think it is possible
> to
> > make efficient conversions from []T to []interface.
> > For example, we don't need to convert every element in []T to
> interface{},
> > we can just use following struct to represent a special []interface{},
> > the concrete type of all interface{} values in the []interface{} is the
> same
> > one.
> >>
> >> type specialInterfaceSlice struct {
> >> typ *_type
> >> values []T
> >> }
> >
>
> That avoids the copy, but makes it impossible to take the address of
> an interface{} in that []interface{}.
>
Then how about adding a new field "inters []interfaceValue" in
specialInterfaceSlice struct.
At initial, it is blank, its elements will be created on needed. for
example, to get element address.
type specialInterfaceSlice struct {
typ *_type
values []T
inters []interfaceValue
}
type interfaceValue struct {
specialSlice *specialInterfaceSlice
}
then compiler can get the concrete type and value from
interfaceValue.specialSlice
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