获取函数的地址 [Swift 3.0]

Question

You can get an address of AnyObject with unsafeAdressOf(object:AnyObject) -> UnsafePointer<void> function call but how can I get an address of a function? for example

func foo(){print("hi")}
print(unsafeAdressOf(foo))

does not work

Answer 1

class Foo {
    func poo(value: Int) {
        print(value)
    }
}
typealias classFunctionType = @convention(thin) (Foo)->(Int)->()

func getSwiftFunctionAddr(_ function: @escaping classFunctionType) -> UnsafeMutableRawPointer {
    return unsafeBitCast(function, to: UnsafeMutableRawPointer.self)
}

let func_addr = getSwiftFunctionAddr(Foo.poo)

print(func_addr)