//: Playground - noun: a place where people can play


// EXAMPLE Materials

class MyClass {
    var property: Bool = false

    // example with method on a class
    func then(applying action: (MyClass) -> Void) -> MyClass {
        action(self)
        return self
    }
}

struct MyStruct {
    var property: Bool = false

    // example with method on a struct
    func with(applying action: (inout MyStruct) -> Void) -> MyStruct {
        var copy = self
        action(&copy)
        return copy
    }
}

// example with plain function
func modify(item: MyStruct, applying action: (inout MyStruct) -> Void) -> MyStruct {
    var copy = item
    action(&copy)
    return copy
}

// EXAMPLE for working autocompletions

let y = MyStruct().with { a in
    a.property = true // type a.prop… yes, autocompletion to a.property works
}

let z = modify(item: y) { a in
    a.property = false // type a.prop… yes, autocompletion to a.property works
}

let c =  MyClass().then { c in
    c.property = true // type a.prop… yes, autocompletion to a.property works
}

let d =  MyClass().then(applying: { (d: MyClass) in
    d.property = false // type a.prop… yes, autocompletion to a.property works
})

struct MyOtherStruct {
    init() {
        let y = MyStruct().with { a in
            a.property = true // type a.prop… yes, autocompletion to a.property works
        }
    }
    func function() {
        let y = MyStruct().with { a in
            a.property = true // type a.prop… yes, autocompletion to a.property works
        }
    }
}

// EXAMPLE 1 for no autocompletion for a.property

do {
    let x = MyStruct().with { a in
        a.property = true // type a.prop… no, autocompletion does not work
    }
    let z = modify(item: x) { x in
        x.property = false // type a.prop… no, autocompletion does not work
    }
    let c =  MyClass().then { c in
        c.property = false // type a.prop… no, autocompletion does not work
    }
    let d =  MyClass().then(applying: { (d: MyClass) in
        d.property = false // type a.prop… no, autocompletion does not work
    })
}

// EXAMPLE 2 for no autocompletion for a.property

struct B {
    let x = MyStruct().with { a in
        a.property = true // type a.prop… no, autocompletion does not work
    }
    let c =  MyClass().then { c in
        c.property = false // type a.prop… no, autocompletion does not work
    }
    // … same as EXAMPLE 1
}