Re: Is multi-level function return possible?

> [Yes, it's lexically scoped. Pascal functions use displays, which
> keep the frame pointers of all of the lexically enclosing blocks with
> variables visible in a routine, which are filled in by chasing
> pointers to the calling function's display. So in case of recursion,
> the display has the most recent frame pointer. You can't get much
> more complicated than this and still use a single stack. -John]


None of the Pascal compilers I worked on used a display; instead they chased
the static chain if necessary to access a non-local.


--
Bill Findlay
with blueyonder.co.uk;
use surname & forename;
[Oh, right. That works, too, and is probably better if non-local references
are uncommon. -John]

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