On Saturday, June 20, 2020 at 4:48:07 PM UTC-4, Ian Lance Taylor wrote:
>
> On Sat, Jun 20, 2020 at 8:26 AM T L <tapi...@gmail.com <javascript:>> 
> wrote: 
> > 
> > For example, if there is a builtin convertible(from, to) constraint, 
> > We can define a slice conversion function as 
> > 
> > func Convert(type Ta, Tb converitble(Ta, Tb)) (avs []Ta, _Tb) (bvs []Tb) 
> { 
> >    bvs = make([]Tb, 0, len(avs) 
> >    for _, v := range avs { 
> >       bvs = append(bvs, Tb(v)) 
> >    } 
> >    return bvs 
> > } 
> > 
> > We can use it as: 
> > 
> > iValues := Convert([]int{}{1, 2, 3}, interface{}(nil)) 
>
>
> https://go.googlesource.com/proposal/+/refs/heads/master/design/go2draft-type-parameters.md#no-way-to-express-convertability
>  
>
> Ian 
>

What are the rationales behind this?

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