[REBOL] Re: Stack overflow
From: joel:neely:fedex at: 28-Jun-2001 7:05
Hi, Thorsten,
Thorsten Moeller wrote:
> Hi,
>
> i have some problems with an app i put together. There is a
> wait loop which is testing for an time argument to come true
> and send/receive a mail. This wait-loop always ends up in an
> stack overflow error.
>
> receive: [ 15:45 (code ......)]
>
> wait-loop: does [
> dispatch [1 [
> if equal? now/time first receive [ do next receive ]
> ]
> wait-loop
> ] ]
>
> Any suggestions?
>
As I'm sure you know, DOES simply creates a function with
neither parameters nor locals. Therefore, your WAIT-LOOP
is recursive.
There's no exit/return, and REBOL doesn't do tail-recursion
elimination, so every "cycle" consumes more stack.
Try wrapping DISPATCH in a loop of some sort and eliminating
the recursion.
HTH!
-jn-
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joel'dot'neely'at'fedex'dot'com
