Styjun

[MacOS 10.14.1, Xcode 10.1, Swift 4.2]

I'm working on creating a getopt style CLI argument processor whilst practising Swift. In my design, I decided to create a computed variable, represented as a [String:Bool] dictionary, that can be checked to see if an option (key) is just a switch (value = true) or whether it may include parameters (value = false). So I've written the code below, all of which is, at the moment, in my small (300 lines) main.swift file.

The code works correctly in a playground, but in my Swift Xcode project, whilst the dictionary's keys are correct, values are always false and inconsistent with the printed messages.

let options = "cwt:i:o:"
//lazy var optionIsSwitch : [String:Bool] = { (This will be moved to a class)
var optionIsSwitch : [String:Bool] = 
 var tmpOptionIsSwitch : [String:Bool] = [:]
 let optionsStrAsArray = Array(options)
 let flags = Array(options.filter !":".contains($0) )
 tmpOptionIsSwitch.reserveCapacity(flags.count)
 for thisOption in 0...flags.count-1 
 var posInOptionsStr = 0
 while posInOptionsStr < optionsStrAsArray.count-1 && flags[thisOption] != optionsStrAsArray[posInOptionsStr] 
 posInOptionsStr += 1
 
 if posInOptionsStr < optionsStrAsArray.count-1 && optionsStrAsArray[posInOptionsStr+1] == ":" 
 tmpOptionIsSwitch[String(flags[thisOption])] = false
 print("(flags[thisOption]) is FALSE")
 else 
 tmpOptionIsSwitch[String(flags[thisOption])] = true
 print("(flags[thisOption]) is TRUE")
 
 
 return tmpOptionIsSwitch
()

I've stepped through the code in my project to observe the execution sequence, and found it to be correct. As per the first image, tmpOptionIsSwitch returns a dictionary containing the right keys but all the values are set to false, which is inconsistent with the print statements.

As part of my debugging activities, I copied the above code into a Swift Playground where I found it gave the correct results, as per the image below.

Has anyone has such an issue? Is there something I've done wrong?