Using × as a custom operator for creating "x-by-y" values such as CGPoint or CGSize.

x-by-y-operator.swift

precedencegroup XByYPrecedence {
  associativity: left
  higherThan: MultiplicationPrecedence
}

infix operator ×: XByYPrecedence // U+00D7 MULTIPLICATION SIGN

// ------

import CoreGraphics

func × (x: CGFloat, y: CGFloat) -> CGPoint {
  CGPoint(x: x, y: y)
}

func × (width: CGFloat, height: CGFloat) -> CGSize {
  CGSize(width: width, height: height)
}

let point: CGPoint = 100×80
let size: CGSize = 800×600

// ------

import UIKit

let image = UIGraphicsImageRenderer(size: 320×240).image { context in
  UIColor.yellow.setFill()
  UIRectFill(CGRect(origin: 20×20, size: 280×200))
}

// ------

import SceneKit

func × (xy: CGPoint, z: CGFloat) -> SCNVector3 {
  SCNVector3(xy.x, xy.y, z)
}

let point3D: SCNVector3 = 10×20×30