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Re: What are the arguments in favor of delay/force in eval.c?
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From: |
Kevin Ryde |
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Subject: |
Re: What are the arguments in favor of delay/force in eval.c? |
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Date: |
Thu, 15 Dec 2005 08:10:49 +1100 |
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User-agent: |
Gnus/5.110004 (No Gnus v0.4) Emacs/21.4 (gnu/linux) |
Rob Browning <address@hidden> writes:
>
> You may have already noticed this, but I think the semantics of
> SRFI-45 force/delay are supposed to be a strict superset of R5RS
> force/delay, so in theory we might be able to have just one type of
> promise.
As far as I can tell there's two types of promises, one generated by
`delay' the other by `lazy', so if you only use delay+force you get
r5rs, if you use lazy+force you get the new style.