Cast-Free Arithmetic in Swift

Requires: Swift 2.0+

With Cast-Free Arithmetic in Swift you no longer need to cast to do arithmetic operations on mismatched number types.

Single Letter Casting

Single letter property conversion to Float, CGFloat, Double, Int

let num:Double   =  12;
let num2:Float   =  num.f;
let num3:CGFloat =  num.c;
let num4:Int     =  num.i;
let num5:Double  = num2.d;

let znum:Int = 5 
let znum1:Double = 7.0;

Cast-less Arithmetic!

Default return type for mismatched number types in Double

let znum2 = znum + znum1 * znum + num5 

or

let znum3:Double = 5.i + 5.5.f * 2.i / 5.5.c 

We can now also return to types other than Double automatically

let znum2:CGFloat = znum + znum1 * znum + num5

Cast-less Arithmetic Compiler Complaints

Add + 0 if compiler has warning on exactly two operators

let totalA:Float = val1 + val2 * val3 + 0

Equatable and Comparable Operators

You can use Equatable and Comparable operations on mismatched number types also

if val1 == val4 {
    print("\(val1).\(val1.dynamicType) == \(val4).\(val4.dynamicType)")
}else {
    print("\(val1).\(val1.dynamicType) != \(val4).\(val4.dynamicType)")
}

if val3 != val4{
    print("\(val3).\(val3.dynamicType) != \(val4).\(val4.dynamicType)")
}

if val3 >= val4{
    print("\(val3).\(val3.dynamicType) >= \(val4).\(val4.dynamicType)")
}

if val3 > val4{
    print("\(val3).\(val3.dynamicType) > \(val4).\(val4.dynamicType)")
}

if val3 <= val4{
    print("\(val3).\(val3.dynamicType) <= \(val4).\(val4.dynamicType)")
}

if val3 < val4{
    print("\(val3).\(val3.dynamicType) < \(val4).\(val4.dynamicType)")
}