UIBuildable

UI.swift

import UIKit

postfix operator ...

protocol UIConfigurable {
    func configure<T>(_ configure: (inout T) -> Void) -> T
    static func ...<T>(_ lhs: Self, _ block: (inout T) -> Void) -> T
}

extension UIView: UIConfigurable {
    static func ... <T>(lhs: UIView, block: (inout T) -> Void) -> T {
        return lhs.configure(block)
    }

    func configure<T>(_ configure: (inout T) -> Void) -> T {
        var buildView = self as! T
        configure(&buildView)
        return buildView
    }
}

let backgroundView: UIView = UIView() ... {
    $0.backgroundColor = .blue
}

let label: UILabel = UILabel() ... {
    $0.text = "Hello World"
}

let label2: UILabel = UILabel().configure() {
    $0.text = "Hello World"
}