Static function variables in Swift

Question

I\'m trying to figure out how to declare a static variable scoped only locally to a function in Swift.

In C, this might look something like this:

int         


        

Answer 1

Swift 1.2 with Xcode 6.3 now supports static as expected. From the Xcode 6.3 beta release notes:

“static” methods and properties are now allowed in classes (as an alias for “class final”). You are now allowed to declare static stored properties in classes, which have global storage and are lazily initialized on first access (like global variables). Protocols now declare type requirements as “static” requirements instead of declaring them as “class” requirements. (17198298)

It appears that functions cannot contain static declarations (as asked in question). Instead, the declaration must be done at the class level.

Simple example showing a static property incremented inside a class (aka static) function, although a class function is not required:

class StaticThing
{
    static var timesCalled = 0

    class func doSomething()
    {
        timesCalled++

        println(timesCalled)
    }
}

StaticThing.doSomething()
StaticThing.doSomething()
StaticThing.doSomething()

Output:

1
2
3