On 16.03.2017 19:31, Ingo Lohmar wrote:
> On Thu, Mar 16 2017 13:20 (-0400), Sam Steingold wrote:
>> --8<---------------cut here---------------start------------->8---
>> (defun my-command (beg end)
>>    (interactive "r")
>>    (if (use-region-p)
>>        (my-command-region beg end)
>>      (my-command-non-region)))
>> --8<---------------cut here---------------end--------------->8---
> Hi Sam,
>
> AFAIK, you cannot use the (interactive "r") form for this "dwim-ish"
> kind of behavior.

Why that? If a region is set, why should (use-region-p) fail?

The answer is: there are contradictions in implementation.
Which was discussed at time.

Thanks Sam for showing that.