pure func square(x: Int) -> Int {
    return x * x
}

pure func add(x: Int, y: Int) -> Int {
    return x + y
}

func main() {
    let input: Int[8] = [...]
    let squares = map(square, input)
    let sum = @reduce(add, 0, squares)
}

class HardwareMap {
    func map(Self) -> Self
}