Enumerations

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Enums1.swift

#!/usr/bin/env swift;
import Foundation
import Utils

enum CompassPoint : Int {
	case North
	case East
	case South
	case West
}

func compassPointToString(_ c:CompassPoint) -> String {
	var result:String = ""
	switch c {
		case CompassPoint.North:
			result = "North"
		case CompassPoint.East:
			result = "East"
		case CompassPoint.South:
			result = "South"
		case CompassPoint.West:
			result = "West"
	}
	return result
}

func turnRight(_ c:CompassPoint) -> CompassPoint {
	if c == CompassPoint.North {
		return CompassPoint.East
	} else if c == CompassPoint.East {
		return CompassPoint.South
	} else if c == CompassPoint.South {
		return CompassPoint.West
	} else {
		return CompassPoint.North
	}
}

func main() -> Void {
	var cp1:CompassPoint = CompassPoint.North
	print("cp1: " + String(describing: cp1))
	print("SOUTH: " + compassPointToString(CompassPoint.South))
	print("turnRight(cp1): " + compassPointToString(turnRight(cp1)))
	let CP2:CompassPoint = CompassPoint.East
	if cp1 == CP2 {
		print("cp1 == cp2")
	} else {
		print("cp1 != cp2")
	}
	cp1 = CP2
	if cp1 == CP2 {
		print("cp1 == cp2")
	} else {
		print("cp1 != cp2")
	}
	exit(EXIT_SUCCESS)
}
main()

Enums2.swift

#!/usr/bin/env swift;
import Foundation
import Utils

enum Color : Int {
	case Red = 1
	case Green = 2
	case Yellow = 3
	case Blue = 4
	case Magenta = 5
	case Cyan = 6
}

func combineColors(_ c1:Color, _ c2:Color) -> Color {
	let i1:Int = c1.rawValue
	let i2:Int = c2.rawValue
	let RESULT:Int = i1 | i2
	let RETURN_COLOR:Color? = Color(rawValue: RESULT)!
	return RETURN_COLOR!
}

func main() -> Void {
	var c1:Color = Color.Blue
	print("c1: " + String(describing: c1))
	print("RED: " + String(describing: Color.Red))
	print("combineColors(c1, RED): " + String(describing: combineColors(c1, Color.Red)))
	let c2:Color = Color.Green
	print("combineColors(c1, c2): " + String(describing: combineColors(c1, c2)))
	if c1 == c2 {
		print("c1 == c2")
	} else {
		print("c1 != c2")
	}
	c1 = c2
	if c1 == c2 {
		print("c1 == c2")
	} else {
		print("c1 != c2")
	}
	let BAD:Color? = Color(rawValue: 7)!
	print("bad: " + String(describing: BAD))
	exit(EXIT_SUCCESS)
}
main()

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