On Mon, Jun 29, 2009 at 12:25 PM, Slava Pestov<sl...@factorcode.org> wrote:
> Hi Harold,
>
> The quotations can optionally access values from the stack as long as
> they leave the right number of values at the end (the predicate must
> leave a boolean and the other quotation must not change the stack
> height).

Thanks for this explanation, I think it makes sense. Is it then true
to say that these two stack effects are equivalent:
( -- ? )
( x -- x ? )

Or does the stack effect checker care? e.g., does it confirm that (at
least?) the correct number of arguments are available?

-Harold

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