Re: Getting the original type of an 'upcasted' object

[Stefan_Salewski]

I am not sure what the result of your test() should be and for what you will 
use that result.

You can use type(x) to get the static base type of an object and name from 
typetraits module to get the typename: Following code works, but I don't know 
if it can help you:
    
    
    type
      A = ref object of RootObj
      
      B = ref object of A
        i: int
    
    var b = new B
    
    var s = newSeq[A]()
    
    s.add(new A)
    s.add(new B)
    
    echo s[0] of A
    echo s[0] of B
    echo s[1] of A
    echo s[1] of B
    
    var x: type(s[1])
    
    assert x is A # it is not B!
    
    import typetraits
    
    echo type(s[1]).name
    echo type(x).name
    
    
    
    Run
    
    
    $ ./t
    true
    false
    true
    true
    A
    A
    
    
    
    Run