+ extractfun comparefun tempfun extract-string-p)
EXTRACT-STRING-P, and possibly TEMPFUN, are bound too early. See below.
I moved EXTRACT-STRING-P to a lower let but TEMPFUN has to be available to the call to sort so I left it in the outer let.
I suggest something like
(let* ((tempfun (or getkey-func
(intern ...)))
(extract-string-p (stringp (funcall tempfun (caar table)))))
(setq extractfun (if (and extract-string-p (not with-case))
`(lambda (x) (downcase (funcall ',tempfun x)))
tempfun))
(setq comparefun
(cond (compare-func)
(extract-string-p (if (= sorting-type ?f) #'string< #'org-string>))
((= sorting-type ?f) #'<)
(t #'>))))
I followed this suggestion modulo leaving TEMPFUN in the outer let.
Thanks for your suggestions.
The attached patch was against the latest master branch at the time I generated it.
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0001-org.el-Implement-user-defined-table-sorting.patch
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