Swift Variable Address Dump to console

1MemoryDump.swift

struct Memory {
    static func dump<T>(variable: inout T) {
        withUnsafePointer(to: &variable) { print($0) }
    }
    
    static func dump(with: UnsafeRawPointer) {
        let address = Int(bitPattern: with)
        print(String(format:"%p", address))
    }
    
    static func dump(object: AnyObject) {
        print(Unmanaged.passUnretained(object).toOpaque())
    }
}

2example.swift

    var str1 = "abcd"
    print("--------String(\(MemoryLayout.size(ofValue: str1)))-----")
    Memory.dump(variable: &str1)

    var array1 = [1,2,3]
    print("--------Array(\(MemoryLayout.size(ofValue: array1)))------")
    Memory.dump(variable: &array1)
    Memory.dump(with: array1)

    var value1 = 10
    print("--------Int(\(MemoryLayout.size(ofValue: value1)))---------")
    Memory.dump(variable: &value1)

    class MyPoint {
        var x : Int = 0
        var y : Int = 0
    }

    let pp1 = MyPoint()
    print("--------class(\(MemoryLayout.size(ofValue: pp1)))-------")
    Memory.dump(object: pp1)

3full-example.swift

struct Point {
    var x : Int
    var y : Int
    var dummy1 : Int = 1
    var dummy2 : Int = 2
}

struct CardDeck {
    private var deck = [Int]()
    
    mutating func reset() {
        deck.append(10)
        deck.removeAll()
    }
}

class MyPoint {
    var x : Int = 0
    var y : Int = 0
}

var ptr : MyPoint?

func foo() {
    var str1 = "abcd"
    print("--------String(\(MemoryLayout.size(ofValue: str1)))-----")
    Memory.dump(variable: &str1)
    Memory.dump(with: str1)
    var str2 = str1
    Memory.dump(variable: &str2)
    Memory.dump(with: str2)
    str2 = "xxxx"
    Memory.dump(variable: &str2)
    Memory.dump(with: str2)

    var array1 : Array<Int> = [1,2,3]
    print("--------Array(\(MemoryLayout.size(ofValue: array1)))------")
    Memory.dump(variable: &array1)
    Memory.dump(with: array1)
    var array2 = array1
    Memory.dump(variable: &array2)
    Memory.dump(with: array2)
    array1.append(4)
    Memory.dump(variable: &array1)
    Memory.dump(with: array1)

    var value1 = 10
    print("--------Int(\(MemoryLayout.size(ofValue: value1)))---------")
    Memory.dump(variable: &value1)
    var value2 = value1
    Memory.dump(variable: &value2)
    value1 = 11
    Memory.dump(variable: &value1)

    var ptr1 = Point(x: 1, y: 1)
    print("--------Point(\(MemoryLayout.size(ofValue: ptr1)))------")
    Memory.dump(variable: &ptr1)
    var ptr2 = ptr1
    Memory.dump(variable: &ptr2)
    ptr1.x = 10
    Memory.dump(variable: &ptr1)

    var pp1 = MyPoint()
    pp1.x = 10
    pp1.y = 20
    print("--------class(\(MemoryLayout.size(ofValue: pp1)))-------")
    Memory.dump(with: &pp1)
    Memory.dump(object: pp1)
    var pp2 = pp1
    Memory.dump(with: &pp2)
    Memory.dump(object: pp2)
    ptr = pp2
    
    print("--------CardDeck-------")
    var deck = CardDeck()
    Memory.dump(variable: &deck)
    deck.reset()
    Memory.dump(variable: &deck)
}

func bar() {
    enum Fruit {
        case apple
        case orange
    }
    let character = Fruit.apple
    print("bar-\(character)")
}

foo()
bar()