[Proposal] Allow for inline creation and handling of IDisposable objects (RAAI)

Proposed syntax would be

var x = using new Disposable();
var y = using new Disposable();

The code is just a shorter way of writing:

using (var x = new Disposable())
{
  using (var y = new Disposable())
  {
  }
}

Which is actually much more composable with try-catch pattern. Now we can remove one extra pair of curly braces and write:

try
{
   var x = using new Disposable();
}
catch
{
  // log and handle
}

[gafter]

I like the syntax from #5881 better.

[svick]

@gafter Since #5881 was previously closed as duplicate of this issue, shouldn’t it be reopened now?