[go-nuts] [generics] Should convertibility and comparibility of two types be two kinds of constraints?

[T L]

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))

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