Re: clarification: overloading is strictly on parameter types?

[GULPF]

You can send the type as an argument, either as a generic or as a `typedesc` 
parameter: 
    
    
    let x = 3
    
    proc by_two(val: int, T: typedesc[int]): int =
      result = val * 2
    
    proc by_two(val: int, T: typedesc[string]): string =
      result = $val & " and " & $val
    
    let a = x.by_two(int)
    let b = x.by_two(string)
    
    echo a
    echo b
    
    proc by_two[T: int|string](val: int): T =
      when T is int:
        result = val * 2
      elif T is string:
        result = $val & " and " & $val
    
    let c = x.by_two[:int]()
    let d = x.by_two[:string]()
    
    echo a
    echo b