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  1. type
  2.   A* = ref object of RootObj
  3.     a: int
  4.   B = ref object of A
  5.     b: int
  6.  
  7. proc newA*(
  8.   a: int
  9. ): A =
  10.   return A(a: a)
  11.  
  12. proc newB*(
  13.   aObj: A,
  14.   b: int
  15. ): B =
  16.   result = B(aObj)
  17.   result.b = b
  18.  
  19. discard newB(newA(1), 2)
Runtime error #stdin #stdout #stderr 0s 2372KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Traceback (most recent call last)
prog.nim(19)             prog
prog.nim(16)             newB
Error: unhandled exception: invalid object conversion [ObjectConversionError]
https://ideone.com/lik2V7
language:
Nim (nim 0.19.4)
created:
9 years ago
visibility:
public

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