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インスタンスメソッド内でクラスメソッドを呼ぶ #Swift

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Objective-Cでいうところの [[self class] classMethod] を Swift では以下のように書くことが出来るようです。

class Hoge {
    class func classMethod() {
        println("classMethod")
    }

    func method() {
        self.dynamicType.classMethod()
    }
}

let hoge = Hoge()
hoge.method() // "classMethod"
hoge.dynamicType.classMethod() // "classMethod"

dynamicTypeを使うと、インスタンスのクラス自身(サブクラス化されていればサブクラス)が参照され、クラスメソッドを呼び出すことが出来るようになります。

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