Thank you. I will get back to creating the patch this weekend and will
include your suggested change.
Best regards,
-- Piyush.
Nicolas Goaziou writes:
> Hello,
>
> Piyush Srivastava writes:
>
>> In the current org mode version (release_9.1.13), when a named cell
>> formula is stored using C-u C-c =, the #+TBLFM line stores the name of
>> the cell *without* a prefix $ sign, as in the following table (notice
>> that in the #+TBLFM row, there is no $ sign before the 'sum' variable):
>>
>> | | c |
>> |---+-|
>> | | 3 |
>> | | 10 |
>> |---+-|
>> | # | 14 |
>> | ^ | sum |
>> |---+-|
>>
>> #+TBLFM: sum=vsum(@-II$0..@-I$0)
>>
>>
>> With this convention, pressing TAB in the row after making a change in
>> the table does not update the field referred to by $sum, contrary to
>> what is said in the manual.
>>
>>
>> However, if I manually add a prefix $ to the variable sum in the #+TBLFM
>> row (as in the table below), then TAB update work as described in the
>> manual (notice the $sum variable in the #+TBLFM row):
>>
>>
>> | | c |
>> |---+-|
>> | | 3 |
>> | | 12 |
>> |---+-|
>> | # | 15 |
>> | ^ | sum |
>> |---+-|
>>
>> #+TBLFM: $sum=vsum(@-II$0..@-I$0)
>>
>>
>> A fix is to ensure that if the LHS of a field formula being inserted is
>> a field name rather than a numerical reference, then a '$' should be
>> prefixed to it. I have the following patch that implements this:
>>
>>
>> diff --git a/lisp/org-table.el b/lisp/org-table.el
>> --- a/lisp/org-table.el
>> +++ b/lisp/org-table.el
>> @@ -2301,7 +2301,13 @@ LOCATION instead."
>> (org-indent-line)
>> (insert (or (match-string 2) "#+TBLFM:")))
>>(insert " "
>> - (mapconcat (lambda (x) (concat (car x) "=" (cdr x)))
>> + (mapconcat (lambda (x)
>> + (let* ((name (car x))
>> + (first (substring-no-properties name 0 1))
>> + (test (or (string= first "@") (string=
>> first "$")))
>> + )
>> +(concat (if test name (concat "$" name))
>> +"=" (cdr x
>> (sort alist #'org-table-formula-less-p)
>> "::")
>> "\n"
>
> You're right.
>
> I suggest the following, though:
>
> (mapconcat (lambda (x)
> (pcase-let ((`(,lhs . ,rhs) x))
>(format "%s=%s"
>(if (string-match-p "\\`[$@]" lhs) lhs
> ;; Named fields are stored
> ;; without the "$" prefix.
> (concat "$" lhs))
>rhs)))
>(sort alist #'org-table-formula-less-p)
>"::")
>
>> I am happy to assign copyright for the patch, if that is needed and if
>> the patch if found suitable, for it to be included in org-mode code.
>
> This is not needed because this patch is a TINYCHANGE. However, starting
> the copyright assignment process is still valuable if you intend to
> provide more patches.
>
> In any case, would you mind providing a patch incorporating the changes
> above with a proper commit message? Also, it might be interesting to add
> a test for it in "test-org-table.el".
>
> Thank you.
>
> Regards,
