This feature has been added with Swift 6.2 and InlineArray.

https://developer.apple.com/documentation/swift/inlinearray

struct Game {
  // Shorthand for InlineArray<40, Sprite>
  var bricks: [40 of Sprite]

  init(_ brickSprite: Sprite) {
    bricks = .init(repeating: brickSprite)
  }
}