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5359 :: Getter and Setter methods in Nim

• torarinvik (orginal) [2019-10-16T09:31:10+02:00] view original

  Hi I have tried several times to create Getter and Setter methods in my project but failed.

  The code is this:

  type

  Human = ref object of RootObj

  age: int job: string height: int weight: int

  var Frank : Human

  proc getAge(a: Human, age: int): int =

  return a.age

  Frank = Human(age: 67) echo Frank.age ("This works)

  getAge(Frank, age) ("This does not work")

  How do I create a Getter and a Setter method to set the age of the Frank object?

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• miran (orginal) [2019-10-16T09:59:17+02:00] view original

  Couldn't render post #33559.

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• torarinvik (orginal) [2019-10-16T10:44:26+02:00] view original

  Thank you!!! Perfect!!

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• leorize (orginal) [2019-10-16T11:51:24+02:00] view original

  You might also wants to do this the Nim way

  proc age(a: Human): int = a.age
  
  proc `age=`(a: var Human, age: int) =
    a.age = age
  
  Frank.age = 99 # or `age=`(Frank, 99)
  echo Frank.age # or age(Frank)
  Run

  Note: if the age field can be accessed directly, then Nim will prioritize that instead.

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• cblake (orginal) [2019-10-16T11:52:17+02:00] view original

  Should probably also be mentioned/of interest to @torarinvik that Nim has fancier support for setters as well. See https://nim-lang.org/docs/tut2.html#object-oriented-programming-properties

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