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  1.  
  2. type
  3.   Maybe* [T] =  object {. final .}
  4.     case hasValue*: bool
  5.     of true: value*: T
  6.     else: discard
  7.  
  8.  
  9. proc Just* [T](aValue: T): Maybe[T] {. inline .} =
  10.   result = Maybe[T](hasValue: true, value: aValue)
  11.  
  12. template template_Just* [T](aValue: T): Maybe[T] =
  13.   Maybe[T](hasValue: true, value: aValue)
  14.  
  15.  
  16. proc Nothing* [T]: Maybe[T] {. inline .} =
  17.   result = Maybe[T](hasValue: false)
  18.  
  19.  
  20.  
  21. echo Just[int](1)
  22. echo template_Just[int](1)
  23.  
Success #stdin #stdout 0s 6960KB
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Standard input is empty
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(hasValue: true, value: 1)
(hasValue: true, value: 1)
https://ideone.com/haKCmu
language:
Nim (nim 0.19.4)
created:
5 years ago
visibility:
public

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