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

import Foundation


//===----------------------------------------------------------------------===//
// NSObject ==
//===----------------------------------------------------------------------===//

func printEquality<T: Equatable>(lhs: T, rhs: T, lhsName: String, rhsName: String) {
  if lhs == lhs {
    println("\(lhsName) == \(lhsName)")
  }
  if lhs != lhs {
    println("\(lhsName) != \(lhsName)")
  }
  if lhs == rhs {
    println("\(lhsName) == \(rhsName)")
  }
  if lhs != rhs {
    println("\(lhsName) != \(rhsName)")
  }
}

func printIdentity(lhs: AnyObject, rhs: AnyObject, lhsName: String, rhsName: String) {
  if lhs === lhs {
    println("\(lhsName) === \(lhsName)")
  }
  if lhs !== lhs {
    println("\(lhsName) !== \(lhsName)")
  }
  if lhs === rhs {
    println("\(lhsName) === \(rhsName)")
  }
  if lhs !== rhs {
    println("\(lhsName) !== \(rhsName)")
  }
}


println("NoisyEqual ==")
class NoisyEqual : NSObject {
  @override func isEqual(rhs: AnyObject) -> Bool {
    println("wow much equal")
    return super.isEqual(rhs)
  }
}

let n1 = NoisyEqual.init()
let n2 = NoisyEqual.init()
printIdentity(n1, n2, "n1", "n2")
printEquality(n1, n2, "n1", "n2")
println("done NoisyEqual ==")
// CHECK: NoisyEqual ==
// CHECK-NEXT: n1 === n1
// CHECK-NEXT: n1 !== n2
// CHECK-NEXT: wow much equal
// CHECK-NEXT: n1 == n1
// CHECK-NEXT: wow much equal
// CHECK-NEXT: wow much equal
// CHECK-NEXT: wow much equal
// CHECK-NEXT: n1 != n2
// CHECK-NEXT: done NoisyEqual ==


println("NSObject ==")
let o1 = NSObject.init()
let o2 = NSObject.init()
printIdentity(o1, o2, "o1", "o2")
printEquality(o1, o2, "o1", "o2")
printIdentity(o1, 10, "o1", "10")
printEquality(o1, 10, "o1", "10")
printIdentity(10, o1, "10", "o1")
printEquality(10, o1, "10", "o1")
println("done NSObject ==")
// CHECK: NSObject ==
// CHECK-NEXT: o1 === o1
// CHECK-NEXT: o1 !== o2
// CHECK-NEXT: o1 == o1
// CHECK-NEXT: o1 != o2
// CHECK-NEXT: o1 === o1
// CHECK-NEXT: o1 !== 10
// CHECK-NEXT: o1 == o1
// CHECK-NEXT: o1 != 10
// CHECK-NEXT: 10 === 10
// CHECK-NEXT: 10 !== o1
// CHECK-NEXT: 10 == 10
// CHECK-NEXT: 10 != o1
// CHECK: done NSObject ==


println("NSMutableString ==")
let s1 = NSMutableString.init(withString:"hazcam")
let s2 = NSMutableString.init(withString:"hazcam")
printIdentity(s1, s2, "s1", "s2")
printEquality(s1, s2, "s1", "s2")
println("mutate")
s2.appendString("navcam")
printIdentity(s1, s2, "s1", "s2")
printEquality(s1, s2, "s1", "s2")
println("done NSMutableString ==")
// CHECK: NSMutableString ==
// CHECK-NEXT: s1 === s1
// CHECK-NEXT: s1 !== s2
// CHECK-NEXT: s1 == s1
// CHECK-NEXT: s1 == s2
// CHECK-NEXT: mutate
// CHECK-NEXT: s1 === s1
// CHECK-NEXT: s1 !== s2
// CHECK-NEXT: s1 == s1
// CHECK-NEXT: s1 != s2
// CHECK-NEXT: done NSMutableString ==


//===----------------------------------------------------------------------===//
// NSObject hashValue()
//===----------------------------------------------------------------------===//

func printHashValue<T: Hashable>(x: T, name: String) {
  println("\(name) hashes to \(x.hashValue())")
}


println("NSMutableString hashValue")
println("\(s1.hashValue())")
println("\(s1.hash())")
s1.appendString("pancam")
println("\(s1.hashValue())")
println("\(s1.hash())")
println("done NSMutableString hashValue")
// CHECK: NSMutableString hashValue
// CHECK-NEXT: [[H1:[0-9]+]]
// CHECK-NEXT: [[H1]]
// CHECK-NEXT: [[H2:[0-9]+]]
// CHECK-NEXT: [[H2]]
// CHECK-NEXT: done NSMutableString hashValue


class NoisyHash : NSObject {
  @override func hash() -> Int {
    println("so hash")
    return super.hash()
  }
}

println("NoisyHash hashValue")
let nh = NoisyHash.init()
printHashValue(nh, "nh")
println("done NoisyHash hashValue")
// CHECK: NoisyHash hashValue
// CHECK-NEXT: so hash
// CHECK-NEXT: nh hashes to {{[0-9]+}}
// CHECK: done NoisyHash hashValue


class ValueLike : NSObject {
  var x: Int

  init(withInt: Int) {
    x = withInt
    super.init()
  }

  @override func isEqual(rhs: AnyObject) -> Bool {
    if let rhs2 = rhs as ValueLike {
      return x == rhs2.x
    }
    return false
  }

  @override func hash() -> Int {
    return x
  }
}

println("ValueLike hashValue")
let sh1 = ValueLike.init(withInt:10)
let sh2 = ValueLike.init(withInt:20)
let sh3 = ValueLike.init(withInt:10)
printIdentity(sh1, sh2, "sh1", "sh2")
printIdentity(sh1, sh3, "sh1", "sh3")
printIdentity(sh2, sh3, "sh2", "sh3")
printEquality(sh1, sh2, "sh1", "sh2")
printEquality(sh1, sh3, "sh1", "sh3")
printEquality(sh2, sh3, "sh2", "sh3")
printEquality(sh1.hashValue(), sh2.hashValue(), "sh1 hash", "sh2 hash")
printEquality(sh1.hashValue(), sh3.hashValue(), "sh1 hash", "sh3 hash")
printEquality(sh2.hashValue(), sh3.hashValue(), "sh2 hash", "sh3 hash")
var dict = Dictionary<ValueLike, Int>()
dict[sh1] = sh1.x
dict[sh2] = sh2.x
println("sh1 \(dict[sh1])")
println("sh2 \(dict[sh2])")
println("sh3 \(dict[sh3])")
println("done ValueLike hashValue")
// CHECK: ValueLike hashValue
// CHECK-NEXT: sh1 === sh1
// CHECK-NEXT: sh1 !== sh2
// CHECK-NEXT: sh1 === sh1
// CHECK-NEXT: sh1 !== sh3
// CHECK-NEXT: sh2 === sh2
// CHECK-NEXT: sh2 !== sh3
// CHECK-NEXT: sh1 == sh1
// CHECK-NEXT: sh1 != sh2
// CHECK-NEXT: sh1 == sh1
// CHECK-NEXT: sh1 == sh3
// CHECK-NEXT: sh2 == sh2
// CHECK-NEXT: sh2 != sh3
// CHECK-NEXT: sh1 hash == sh1 hash
// CHECK-NEXT: sh1 hash != sh2 hash
// CHECK-NEXT: sh1 hash == sh1 hash
// CHECK-NEXT: sh1 hash == sh3 hash
// CHECK-NEXT: sh2 hash == sh2 hash
// CHECK-NEXT: sh2 hash != sh3 hash
// CHECK-NEXT: sh1 10
// CHECK-NEXT: sh2 20
// CHECK-NEXT: sh3 10
// CHECK-NEXT: done ValueLike hashValue