swift-mirror/test/Interpreter/SDK/CoreFoundation_casting.swift

// RUN: %target-run-simple-swift | FileCheck %s
// XFAIL: linux

import CoreFoundation
import Foundation

class SwiftClass { }

func genericCast<T>(x: AnyObject, _: T.Type) -> T? {
  return x as? T
}

func genericCastUnconditional<T>(x: AnyObject, _: T.Type) -> T {
  return x as T
}

// Check _cfTypeID() on a Swift class
let nsObject = NSObject()
let swiftObject = SwiftClass()
assert(CFGetTypeID(nsObject) == CFGetTypeID(swiftObject))

// Check CFString <-> AnyObject
func testCFStringAnyObject() {
  // Create a CFString
  let cfStr: CFString
    = CFStringCreateWithCString(nil, "Swift", CFStringBuiltInEncodings.ASCII.rawValue)

  // CHECK: Swift
  println(cfStr)

  // Convert it to AnyObject
  let anyObject: AnyObject = cfStr

  // CHECK: Swift
  println(anyObject)

  // Convert it back to a CFString
  let cfStr2 = anyObject as CFString

  // CHECK: Swift
  println(cfStr2)

  // Conditional cast through a generic to a CFString
  if let cfStr3 = genericCast(anyObject, CFString.self) {
    // CHECK: Swift
    println(cfStr3)
  } else {
    println("Conditional cast failed")
  }

  // Forced cast through a generic to a CFString
  let cfStr4 = genericCastUnconditional(anyObject, CFString.self)

  // CHECK: Swift
  println(cfStr4)

  // CHECK: done
  println("done")
}
testCFStringAnyObject()


// Check CFString.Type <-> AnyObject.Type
func testCFStringAnyObjectType() {
  let cfStr: CFString
    = CFStringCreateWithCString(nil, "Swift", CFStringBuiltInEncodings.ASCII.rawValue)

  let cfStrType = cfStr.dynamicType
  // CHECK: Metatype
  println(cfStrType)

  // Convert to AnyObject.Type
  let anyObjectType: AnyObject.Type = cfStrType
  // CHECK: ExistentialMetatype
  println(anyObjectType)

  // Convert back to CFString.Type
  let cfStrType2 = anyObjectType as CFString.Type
  // CHECK: Metatype
  println(cfStrType2)

  // CHECK: done
  println("done")
}
testCFStringAnyObjectType()