> if you find it more readable
not only readable. I still can't get why they banned constraints on structs
having some fields of certain type. With contracts they are easy to allow:
contract NameField(T) {
T Name string
}
and there's no hope with interfaces
ср, 17 июн. 2020 г. в 21:37, Axel Wagner <axel.wagner...@googlemail.com>:
> Ah sorry, I misunderstood. Please disregard :)
>
> On Wed, Jun 17, 2020, 20:36 Axel Wagner <axel.wagner...@googlemail.com>
> wrote:
>
>> You can always combine multiple interface constraints:
>>
>> type ConstraintA(type A) interface {
>> Foo() A
>> }
>>
>> type ConstraintB(type B) interface {
>> Bar() B
>> }
>>
>> type CombinedConstraint(type A, B) interface {
>> (ConstraintA(A))
>> (ConstraintB(B))
>> }
>>
>> func F(type A, B CombinedConstraint(A, B)) (...) { ... }
>>
>> So I don't think removing contracts prevents you from getting the same if
>> you find it more readable.
>>
>> On Wed, Jun 17, 2020, 18:58 Denis Cheremisov <denis.cheremi...@gmail.com>
>> wrote:
>>
>>> IMO a groups of constraints are horrible with interfaces
>>>
>>> type CommonResponse(type E) interface {
>>> GetError() E
>>> }
>>>
>>> type CommonError interface {
>>> GetCode() int32
>>> }
>>>
>>> func IsOK(type R CommonResponse(E), E CommonError)(r R) bool {
>>> switch r.GetError().GetCode() {
>>> case 0, 200, 201:
>>> return true
>>> default:
>>> return false
>>> }
>>> }
>>>
>>> vs
>>>
>>> constract CommmonResponse(R, E) {
>>> R GetError() E
>>> E GetCode() int32
>>> }
>>>
>>> func IsOK(type R, E CommonResponse)(r R) bool {
>>> switch r.GetError().GetCode() {
>>> case 0, 200, 201:
>>> return true
>>> default:
>>> return false
>>> }
>>> }
>>>
>>> That trickery with commas to express dependcy of types is hard
>>>
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