p-x9 / Modify

⛏Swift syntax sugar for modifying properties

Modify

Swift syntax sugar for modifying properties

Usage

Class Type

let label: UILabel = UILabel()^ // Specify type
    .text("Hello")
    .textColor(.red)
    .backgroundColor(.blue)
    .modify {
        $0.sizeToFit()
    }
    .text("Hello2")

/* or */

let label = UILabel()^
    .text("Hello")
    .textColor(.red)
    .backgroundColor(.blue)
    .modify {
        $0.sizeToFit()
    }
    .text("Hello2")
    .value // Append `value` at the end

/* or */

let label = UILabel()
label^=
    .text("Hello")
    .textColor(.red)
    .backgroundColor(.blue)
    .modify {
        $0.sizeToFit()
    }
    .text("Hello2")

Struct Type

struct Item {
    var text: String = ""
    var number: Int = 0

    mutating func set(text: String) {
        self.text = text
    }
}

Copy and Assign

Make a copy and assign a value. The original item is not modified.

let item = Item()
let new: Item = item^ // Specify type
    .number(2)
    .number(1)
    .text("2")
    .modify {
        $0.set(text: "1")
    }

/* or */

let new = item^
    .number(2)
    .number(1)
    .text("2")
    .modify {
        $0.set(text: "1")
    }
    .value // Append `value` at the end

print(item) // Item(text: "", number: 0)
print(new) // Item(text: "1", number: 1)

Assign

Assign a value to item. The original item is modified.

var item = Item() // var
item^=
    .number(2)
    .number(1)
    .text("2")
    .modify {
        $0.set(text: "1")
    }

print(item) // Item(text: "1", number: 1)

Closure

let button: UIButton = UIButton()^ {
    $0.setTitle("normal", for: .normal)
    $0.setTitle("disabled", for: .disabled)
}
.backgroundColor(.red)
.clipToBounds(true)
.isEnabled(true)

/* or */

let button: UIButton = UIButton()^ 
    .modify {
        $0.setTitle("normal", for: .normal)
        $0.setTitle("disabled", for: .disabled)
    }
    .backgroundColor(.red)
    .clipToBounds(true)
    .isEnabled(true)