Suppose we have a generic interface:
1: public interface IGenericInterface<TValue>
2: {3: ... interface contract
4: }Theoretically this interface can be implemented by any class:
1: class Foo : IGenericInterface<Bar>
2: { 3: ... 4: } 5: 6: class Bar : IGenericInterface<Baz>
7: { 8: ... 9: }The question is: how do we restrict the interface usage so that the generic parameter can only match the class the interface is implemented on?
Specifically, this should be valid:
1: class Foo : IGenericInterface<Foo>
2: { 3: }and this should not compile:
1: class Foo : IGenericInterface<Bar>
2: { 3: }
3 comments:
I was about to give up ..
public interface IGenericInterface<T> where T:IGenericInterface<T> {
}
Must admit this was very good puzzle!
almost.
class Foo : IGenericInterface<Foo>, IGenericInterface<Bar> { }
class Bar :
IGenericInterface<Bar>, IGenericInterface<Foo> { }
would compile.
unfortunately, that's the best solution (which in fact is not a solution) I know.
Hmm, indeed - second class can ruin it up ..
But seems that such restriction is impossible to implement.
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