* return values @ 2009-11-10 10:33 Andreas Roehler 2009-11-10 13:10 ` Alan Mackenzie 0 siblings, 1 reply; 3+ messages in thread From: Andreas Roehler @ 2009-11-10 10:33 UTC (permalink / raw To: emacs-devel Hi, IMHO it might be helpful, if classes of functions have a regular return value. For example functions which move point should return point. `goto-char' does it presently, beginning/end-of-defun not. Also I suggest mentioning the return value in docstring. Thanks all Andreas -- https://code.launchpad.net/s-x-emacs-werkstatt/ http://bazaar.launchpad.net/~a-roehler/python-mode/python-mode.el/ ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: return values 2009-11-10 10:33 return values Andreas Roehler @ 2009-11-10 13:10 ` Alan Mackenzie 2009-11-13 10:56 ` Andreas Roehler 0 siblings, 1 reply; 3+ messages in thread From: Alan Mackenzie @ 2009-11-10 13:10 UTC (permalink / raw To: Andreas Roehler; +Cc: emacs-devel Hi, Andreas! On Tue, Nov 10, 2009 at 11:33:39AM +0100, Andreas Roehler wrote: > Hi, > IMHO it might be helpful, if classes of functions have a regular return > value. > For example functions which move point should return point. Here, it's probably more accurate to say "would have been a good idea", since some users of the current functions will use the current return values, even if only relying on the fact that they're always nil. > `goto-char' does it presently, beginning/end-of-defun not. Indeed. > Also I suggest mentioning the return value in docstring. I am in favour of mentioning the return value of EVERY function, even when (or _especially_ when :-) it's only a sentence like "The return value is of no significance". > Thanks all > Andreas -- Alan Mackenzie (Nuremberg, Germany). ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: return values 2009-11-10 13:10 ` Alan Mackenzie @ 2009-11-13 10:56 ` Andreas Roehler 0 siblings, 0 replies; 3+ messages in thread From: Andreas Roehler @ 2009-11-13 10:56 UTC (permalink / raw To: Alan Mackenzie; +Cc: XEmacs-Beta, emacs-devel Alan Mackenzie wrote: > Hi, Andreas! > > On Tue, Nov 10, 2009 at 11:33:39AM +0100, Andreas Roehler wrote: > >> Hi, > >> IMHO it might be helpful, if classes of functions have a regular return >> value. > >> For example functions which move point should return point. > > Here, it's probably more accurate to say "would have been a good idea", > since some users of the current functions will use the current return > values, even if only relying on the fact that they're always nil. > >> `goto-char' does it presently, beginning/end-of-defun not. > > Indeed. > >> Also I suggest mentioning the return value in docstring. > > I am in favour of mentioning the return value of EVERY function, even > when (or _especially_ when :-) it's only a sentence like "The return > value is of no significance". ... Hi Alan, what about not to have just one return value hard-coded, but let it being choosed via optional return-flags? Let's consider the case of `forward-comment' employed inside a `delete-comments-in-region' function. First `forward-comment' must move. If a comment-section is reached, function must determine its borders in order to delete. Now this second operations basically is redundant, as `forward-comment' determined borders already, otherwise it couldn't know about nested comments. A forward-comment is already able to deliver beg, end --separately or as a list-- and the comment itself as a string. So instead of executing two consecutive functions to determine, forward-comment could take a flag: For example b - return beginning e - return end l - return beginning and end as a list s - return found item as a string Cheers Andreas -- https://code.launchpad.net/s-x-emacs-werkstatt/ http://bazaar.launchpad.net/~a-roehler/python-mode/python-mode.el/ ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2009-11-13 10:56 UTC | newest] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2009-11-10 10:33 return values Andreas Roehler 2009-11-10 13:10 ` Alan Mackenzie 2009-11-13 10:56 ` Andreas Roehler
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