Data commit

Task/Address-of-a-variable/Swift/address-of-a-variable.swift

@@ -0,0 +1,29 @@
+class MyClass { }
+
+func printAddress<T>(of pointer: UnsafePointer<T>) {
+    print(pointer)
+}
+
+func test() {
+    var x = 42
+    var y = 3.14
+    var z = "foo"
+    var obj = MyClass()
+
+    // Use a pointer to a variable on the stack and print its address.
+    withUnsafePointer(to: &x)   { print($0) }
+    withUnsafePointer(to: &y)   { print($0) }
+    withUnsafePointer(to: &z)   { print($0) }
+    withUnsafePointer(to: &obj) { print($0) }
+
+    // Alternately:
+    printAddress(of: &x)
+    printAddress(of: &y)
+    printAddress(of: &z)
+    printAddress(of: &obj)
+
+    // Printing the address of an object that an object reference points to.
+    print(Unmanaged.passUnretained(obj).toOpaque())
+}
+
+test()