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  1. template iff*[T](a: T, t: typedesc, e: stmt): stmt {.immediate.} =
  2.   if a of t:
  3.     let a = t(a)
  4.     e
  5.  
  6. type
  7.   Parent = ref object of RootObj
  8.   SonA   = ref object of Parent
  9.  
  10. method doStuff(a: SonA) = echo "Works"
  11.  
  12. # EXAMPLE
  13. proc create: Parent = SonA()
  14. let p: RootRef = create()
  15.  
  16. iff p, SonA:
  17.   doStuff p
Success #stdin #stdout 0s 2420KB
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Standard input is empty
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Works
https://ideone.com/dCF6RI
language:
Nim (nim 0.19.4)
created:
9 years ago
visibility:
secret

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