Generic base class implementation for both struct and object

Asked Mar 26 '19 at 14:32

Active Mar 26 '19 at 19:55

Viewed 97 times

I have this base class:

public class Result<T>
{
    public T Object { get; set; }
}

and this derived type:

public class OkResult<T> : Result<T>
{

}

that has this dervied type:

public class Ok : OkResult<Object>
{
}

To have a method with this signature as return:

        Result<Guid> Test()
        {
            return new OkResult<Guid>(Guid.NewGuid());
        }

That I can use like this:

var test = Test();
if(test is Ok)
{ 
do something...
}

and also this (if you do the same with error)

var test = Test();
if(test is Error)
{ 
do something...
}

My problem is that it does not work for both structs and objects eventhough struct inherits from object, only for objects. I cannot cast a Result to Ok. Eventhough Ok inherits from OkResult

Is there any solution to this? I just want to check that what ever Im getting back is Ok.

edited Mar 26 '19 at 19:18

asked Mar 26 '19 at 14:32

Erik83

1

It does through boxing, but can I get that to work with generics? – Erik83 Mar 26 '19 at 14:39
`return new Ok(Guid.NewGuid());` You haven't defined a generic `Ok<>` type. Did you mean to write `OkResult` here? – Jeff Mar 26 '19 at 14:43
Sorry, yes, mixed copying code and writing in the question.Will fix it now. – Erik83 Mar 26 '19 at 14:44
2

What do you mean by "does not work"? – Zohar Peled Mar 26 '19 at 14:55
I cannot cast Result to Ok or at least not the way im doing it. Eventhough Ok is inheriting from OkResult – Erik83 Mar 26 '19 at 19:17

Generic base class implementation for both struct and object

0 Answers0