[Chicken-hackers] r7rs, force/delay

[Jörg F . Wittenberger]

r7rs section 4.2.6 (Dynamic bindings) mentions threads and the intro
to section 4 documents a connection between ``parameter``s and ``delay``.

Section 4.2.5 (Delayed evaluation) does not mention threads…

Thus I'm not sure if the case described here would be better clarified
in r7rs or fixed (whatever "fixed" could mean) in chicken.

The case at hand: delayed expressions are somehow to be evaluated
once.  Find some code attached, which shows that the result of
delay'ed expressions is indeed the same, while we find a rather
random number of invocations of the single promise in the whole
program.

Best

/Jörg



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