Re: How to call runForever()?

[mashingan]

@woggioni, how about adding threading to your example, like
    
    
    # compile with --threads:on --threadAnalysis:off
    # because this thread need to modify `thef` value
    
    type
      P2d = object
        x, y: float
      
      P2dp = proc(): P2d
    
    var thef: P2dp = nil
    
    proc foo(): auto =
      var pt = P2d(x: 4, y: 5)
      result = proc(): P2d = pt
      pt.x = -1
    
    proc giveFoo() {.thread.} =
      thef = foo()
    
    var f = foo()
    echo f()
    
    var t: Thread[void]
    t.createThread giveFoo
    joinThread t
    if not thef.isNil:
      echo thef()
    else:
      echo "nothing"
    

As we can see, `thef` is not `nil` but the `P2d` defined from other thread is. 
(I just followed the example, but we actually need ref object instead of object 
)