Test for self referential templated Class

[Robert Fraser]

Manfred_Nowak wrote:
> Koroskin Denis wrote:
> 
>> Use tango.core.Variant.isAtomicType!(T) template to test against
>> builtin  types.
> 
> .. this does not help for user defined types.
> 
> One seem's to need something like
>   
> class C(T){
>   //...
>      !is( T == C!( ... ))
> 
> But this casts one into infinite recursion.
> 
> -manfred

Make it derive from a (non-templated) interface and test for that.