```
type WithSharedOption interface {
SomeMethod()
}
type OptionA struct {
}
func (a OptionA) SomeMethod(){}
type OptionB struct {
}
func (b OptionB) SomeMethod(){}
//without generics
func WithShared(option WithSharedOption){}
func WithANotShared(option OptionA){}
//with generics
func WithShared[T WithSharedOption](option T){}
func WithANotShared(option OptionA){}
```
On Thursday, July 28, 2022 at 6:12:16 AM UTC+7 John wrote:
> As a note, this is how I solve this problem without generics:
>
> https://go.dev/play/p/nsDca0McADY
>
> On Wednesday, July 27, 2022 at 2:54:20 PM UTC-7 John wrote:
>
>> With 1.18 generics, I'm curious if anyone has a good solution using
>> generics to solve the optional argument that can be used in multiple method
>> problem.
>>
>> So say I have two methods, .A() and .B(). Both accept optional arguments
>> where some optional arguments might be shared.
>>
>> Here is a very loose (do not take any of this as the solution, just
>> trying to show what I'm kinda trying to achieve).
>>
>> type AOptions struct{
>> Shared Opt string
>> NotSharedOpt bool
>> }
>>
>> type BOptions struct{
>> Shared Opt string
>> NotSharedOpt int
>> }
>>
>> func WithShared(shared string) CallOption {
>> ...
>> }
>>
>> func WithANotShared(b bool) CallOption {
>> ...
>> }
>>
>> func (c Client) A(options ...CallOption) {
>> opts := AOptions{}
>> for _, o := range options {
>> o(&opts)
>> }
>> ...
>> }
>> func (c Client B(options ...CalOption) {
>> ...
>> }
>>
>> We want to be able to use WithShared() with both A() and B(), but only
>> WithANotShared with the A() method.
>>
>> I've had different solutions to this problem that would give runtime
>> errors, but I'm curious with generics if there is one for compile time that
>> anyone has come up with.
>>
>> Cheers.
>>
>
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