Destructuring arbitrary types with attributes

eg.cs

// Modifiers on primary constructor params would be nice :-)
struct Point(private readonly double x, private readonly double y)
{
  [DestructuringPosition(0)]
  public double X { get; } = x;
  
  [DestructuringPosition(1)]
  public double Y { get; } = y;
}

class Program
{
  static void Main()
  {
    var (x, y) = GetPosition();
    Console.WriteLine("X = {0}, Y = {1}", x, y);
    
    // or why not even?
    Console.WriteLine("X = {0}, Y = {1}", GetPosition());
  }
  Point GetPosition()
  {
    // Structuring based on position of primary constructor parameters
    return 100, 200;
  }
}