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Interlisp / medley

The main repo for the Medley Interlisp project. Wiki, Issues are here. Other repositories include maiko (the VM implementation) and Interlisp.github.io (web site sources)
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Unprocessed form tail error from CL:LOOP #1614

Open pamoroso opened 7 months ago

pamoroso commented 7 months ago

The Medley implementation of Common Lisp loop doesn't support nested iterations and returns the error Loop form tail (...) remained unprocessed. for such clauses. A test case is available.

This was discovered when evaluating the compatibility of Medley Common Lisp with ANSI Comon Lisp as part of issue #609, specifically by testing the condition system code of the book Practical Common Lisp as described in discussion #1613.

tfeb commented 7 months ago

See my comment to #1613 which probably belongs here: loop doesn't do nested iteration and I think the implementation is correct with regards to #1613: the code is wrong in other words. I may be wrong in that case but certainly loop does not do nested iteration.

pamoroso commented 7 months ago

Thanks, I renamed the issue "Unprocessed form tail error from CL:LOOP".

tfeb commented 7 months ago

@pamoroso While I think (same caveat as before!) that the error message is unhelpful it is, I think correct: presumably what it's saying is 'I was a state where I expected an x but I saw a y and gave up'