Swift: AnyClass variable that conforms to protocol

I have a static function I want to call on a class conforming to a protocol.

protocol P {
    static func f();
}

class C: P {
    static func f() {}
}

Is there a way to store C.self as a variable with a type that conforms to the protocol? Below does not compile, but it's what I'm ideally trying to do:

let a: AnyClass<P> = C.self;
a.f();