When running the code below in a playground file, it crashes with an LLDB RPC Server crash. The crash log is attached. If I put the code into a project, it runs fine.
lldb-rpc-server-2024-10-04-110747.txt
import Foundation
@objc protocol Speaker {
func speak()
@objc optional func tellJoke()
}
class Deb: Speaker {
func speak() {
print("Hello, I'm Deb!")
}
func tellJoke() {
print("What did Sushi A say to Sushi B?")
}
}
class Bryan: Speaker {
func speak() {
print("Yo, I'm Bryan!")
}
func tellJoke() {
print("What is the object oriented way to become wealthy?")
}
func writeTutorial() {
print("I'm on it!")
}
}
class Animal {}
class Dog: Animal, Speaker {
func speak() {
print("Woof!")
}
}
var speaker: Speaker = Bryan()
if speaker is Bryan {
print("Hi, I'm a Bryan")
}
speaker.speak()
//speaker.writeTutorial() //won't compile
(speaker as! Bryan).writeTutorial()
speaker = Deb()
speaker.speak()
speaker.tellJoke?()
speaker = Dog()
speaker.tellJoke?() //return nil
protocol MtgSimulatorDelegate {
func mtgSimulatorDidStart(sim: MtgSimulator, a: Speaker, b: Speaker)
func mtgSimulatorDidEnd(sim: MtgSimulator, a: Speaker, b: Speaker)
}
class LoggingMtgSimulator: MtgSimulatorDelegate {
func mtgSimulatorDidStart(sim: MtgSimulator, a: any Speaker, b: any Speaker) {
print("Meeting started")
}
func mtgSimulatorDidEnd(sim: MtgSimulator, a: any Speaker, b: any Speaker) {
print("Meeting ended")
}
}
class MtgSimulator: MtgSimulatorDelegate {
func mtgSimulatorDidStart(sim: MtgSimulator, a: any Speaker, b: any Speaker) {
print("the meeting started")
}
func mtgSimulatorDidEnd(sim: MtgSimulator, a: any Speaker, b: any Speaker) {
print("the meeting ended")
}
let a: Speaker
let b: Speaker
var delegate1: MtgSimulatorDelegate?
var delegate2: MtgSimulatorDelegate?
init(a: Speaker, b: Speaker) {
self.a = a
self.b = b
delegate1 = self
}
func simulate() {
print("Off to meeting....")
delegate1?.mtgSimulatorDidStart(sim: self, a: a, b: b)
delegate2?.mtgSimulatorDidStart(sim: self, a: a, b: b)
a.speak()
b.speak()
print("Leaving meeting...")
delegate1?.mtgSimulatorDidEnd(sim: self, a: a, b: b)
delegate2?.mtgSimulatorDidEnd(sim: self, a: a, b: b)
a.tellJoke?()
b.tellJoke?()
}
}//MtgSimulator
let sim = MtgSimulator(a: Deb(), b: Bryan())
sim.delegate2 = LoggingMtgSimulator()
sim.simulate()
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