Swift: Add type inference tests

swift/ql/test/library-tests/type-inference/basics.swift

@@ -0,0 +1,71 @@
+var topLevelDecl : Int = 0
+0
+topLevelDecl + 1 // $ type=topLevelDecl:Int
+
+class C {
+  var myInt : Int
+  // C.init
+  init(n: Int) {
+    myInt = n // $ type=n:Int
+  }
+
+  // C.getMyInt
+  func getMyInt() -> Int {
+    return myInt // $ type=.myInt:Int
+  }
+}
+
+class Derived : C {
+  // Derived.init
+  init() {
+    super.init(n: 0) // $ type=super:C target=C.init
+  }
+
+  // Derived.callGetMyInt
+  func callGetMyInt() -> Int {
+    let x = getMyInt(); // $ type=x:Int target=C.getMyInt
+    return x
+  }
+}
+
+class Generic<T> {
+  var value : T
+  // Generic.init
+  init(v: T) {
+    value = v // $ type=v:T
+  }
+
+  // Generic.getValue
+  func getValue() -> T {
+    return value // $ type=.value:T
+  }
+}
+
+class GenericDerived : Generic<Int> {
+  // GenericDerived.init
+  init() {
+    super.init(v: 0) // $ type=super@Generic<T>:Int target=Generic.init
+  }
+}
+
+func testGeneric() {
+  let g = Generic(v: 42) // $ type=g@Generic<T>:Int target=Generic.init
+  let x = g.getValue() // $ type=x:Int target=Generic.getValue
+
+  let gd = GenericDerived() // $ type=gd:GenericDerived target=GenericDerived.init
+  let y = gd.getValue() // $ type=y:Int target=Generic.getValue
+}
+
+// --- Extensions ---
+
+extension C {
+  // C.doubled
+  func doubled() -> Int {
+    return myInt * 2 // $ type=.myInt:Int
+  }
+}
+
+func testExtension() {
+  let obj = C(n: 10) // $ target=C.init
+  let d = obj.doubled() // $ type=d:Int target=C.doubled
+}

swift/ql/test/library-tests/type-inference/classes.swift

@@ -0,0 +1,231 @@
+// --- Static methods ---
+
+class MathUtils {
+  // MathUtils.square
+  static func square(x: Int) -> Int {
+    return x * x // $ type=x:Int
+  }
+
+  // MathUtils.cube
+  class func cube(x: Int) -> Int {
+    return x * x * x // $ type=x:Int
+  }
+}
+
+func testStaticMethods() {
+  let s = MathUtils.square(x: 4) // $ type=s:Int target=MathUtils.square
+  let cu = MathUtils.cube(x: 3) // $ type=cu:Int target=MathUtils.cube
+}
+
+// --- Simple overloading ---
+
+class Overloaded {
+  // Overloaded.process(_:Int)
+  func process(_ x: Int) -> Int {
+    return x + 1 // $ type=x:Int
+  }
+
+  // Overloaded.process(_:String)
+  func process(_ s: String) -> String {
+    return s // $ type=s:String
+  }
+}
+
+func testOverloading() {
+  let o = Overloaded() // $ target=init()
+  let r1 = o.process(42) // $ type=r1:Int target=Overloaded.process(_:Int)
+  let r2 = o.process("hello") // $ type=r2:String target=Overloaded.process(_:String)
+}
+
+// --- Structs and methods ---
+
+struct Matrix {
+  var data : [[Int]]
+
+  // Matrix.init
+  init(data: [[Int]]) {
+    self.data = data
+  }
+
+  // Matrix.rowCount
+  func rowCount() -> Int {
+    return data.count
+  }
+}
+
+func testSubscripts() {
+  let m = Matrix(data: [[1, 2], [3, 4]]) // $ target=Matrix.init
+  let rc = m.rowCount() // $ type=rc:Int target=Matrix.rowCount
+}
+
+// --- Nested types ---
+
+class Outer {
+  class Inner {
+    var value : Int
+
+    // Outer.Inner.init
+    init(value: Int) {
+      self.value = value // $ type=value:Int
+    }
+
+    // Outer.Inner.getValue
+    func getValue() -> Int {
+      return self.value // $ type=.value:Int
+    }
+  }
+}
+
+func testNestedTypes() {
+  let inner = Outer.Inner(value: 99) // $ type=inner:Inner target=Outer.Inner.init
+  let v = inner.getValue() // $ type=v:Int target=Outer.Inner.getValue
+}
+
+// --- Method chaining ---
+
+class Builder {
+  var value : Int = 0
+
+  // Builder.init
+  init() {}
+
+  // Builder.set
+  func set(_ v: Int) -> Builder {
+    value = v
+    return self
+  }
+
+  // Builder.add
+  func add(_ v: Int) -> Builder {
+    value += v
+    return self
+  }
+
+  // Builder.build
+  func build() -> Int {
+    return value // $ type=.value:Int
+  }
+}
+
+func testChaining() {
+  let b = Builder() // $ type=b:Builder target=Builder.init
+  let result = b.set(10).add(5).build() // $ type=result:Int target=Builder.set target=Builder.add target=Builder.build
+}
+
+// --- Default parameter values ---
+
+class Config {
+  // Config.init
+  init() {}
+
+  // Config.setup
+  func setup(retries: Int = 3, timeout: Double = 30.0) -> Int {
+    return retries // $ type=retries:Int
+  }
+}
+
+func testDefaultParams() {
+  let cfg = Config() // $ type=cfg:Config target=Config.init
+  let r1 = cfg.setup() // $ type=r1:Int target=Config.setup
+  let r2 = cfg.setup(retries: 5) // $ type=r2:Int target=Config.setup
+  let r3 = cfg.setup(retries: 2, timeout: 60.0) // $ type=r3:Int target=Config.setup
+}
+
+// --- Computed properties accessed via methods ---
+
+class Temperature {
+  var celsius : Double
+
+  // Temperature.init
+  init(celsius: Double) {
+    self.celsius = celsius // $ type=celsius:Double
+  }
+
+  // Temperature.toCelsius
+  func toCelsius() -> Double {
+    return celsius // $ type=.celsius:Double
+  }
+
+  // Temperature.toFahrenheit
+  func toFahrenheit() -> Double {
+    return celsius * 9.0 / 5.0 + 32.0 // $ type=.celsius:Double
+  }
+}
+
+func testTemperature() {
+  let t = Temperature(celsius: 100.0) // $ type=t:Temperature target=Temperature.init
+  let c = t.toCelsius() // $ type=c:Double target=Temperature.toCelsius
+  let f = t.toFahrenheit() // $ type=f:Double target=Temperature.toFahrenheit
+}
+
+// --- Inheritance with overriding ---
+
+class Animal {
+  // Animal.init
+  init() {}
+
+  // Animal.speak
+  func speak() -> String {
+    return "..."
+  }
+}
+
+class Dog : Animal {
+  // Dog.init
+  override init() {
+    super.init() // $ target=Animal.init
+  }
+
+  // Dog.speak
+  override func speak() -> String {
+    return "Woof"
+  }
+
+  // Dog.fetch
+  func fetch() -> String {
+    return "ball"
+  }
+}
+
+class Cat : Animal {
+  // Cat.init
+  override init() {
+    super.init() // $ target=Animal.init
+  }
+
+  // Cat.speak
+  override func speak() -> String {
+    return "Meow"
+  }
+}
+
+func testOverriding() {
+  let d = Dog() // $ type=d:Dog target=Dog.init
+  let ds = d.speak() // $ type=ds:String target=Dog.speak
+  let df = d.fetch() // $ type=df:String target=Dog.fetch
+
+  let ct = Cat() // $ type=ct:Cat target=Cat.init
+  let cs = ct.speak() // $ type=cs:String target=Cat.speak
+}
+
+// --- Mutating methods on structs ---
+
+struct Counter {
+  var count : Int = 0
+
+  // Counter.increment
+  mutating func increment() {
+    count += 1
+  }
+
+  // Counter.getCount
+  func getCount() -> Int {
+    return count // $ type=.count:Int
+  }
+}
+
+func testMutating() {
+  var ctr = Counter() // $ type=ctr:Counter target=init()
+  ctr.increment() // $ target=Counter.increment
+  let val = ctr.getCount() // $ type=val:Int target=Counter.getCount
+}