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bug#17446: 24.4.50; What is the situation around `called-interactively-p

From: Thierry Volpiatto
Subject: bug#17446: 24.4.50; What is the situation around `called-interactively-p'?
Date: Sat, 10 May 2014 10:06:36 +0200
User-agent: mu4e; emacs

Stefan Monnier <address@hidden> writes:

>> (apply #'funcall-interactively (car newcmd) (cdr newcmd))
> No, `newcmd' is an expression, so (cdr newcommand) contains arguments
> that need to be evaluated.  In some/many cases this evaluation is
> trivial (the args are self-quoting, like nil or integers), but sometimes
> the args can be things like (region-beginning).

Hmm, not sure of this, at least for `repeat-complex-command' something
like (region-beginning) is already evaluated and recorded as an integer
no ?
Oh! ok I see, something like M-: (region-beginning)
will be recorded as something like 

(pp-eval-expression (quote (region-beginning)))

>> >    (defun funcall-interactively (fun &rest args)
> [sample hack to define funcall-interactively in terms of call-interactively]
>> This won't work IMO, why fun would be a cons or a byte-code-function ?
> These are the only interesting cases.  The other cases (subrp and
> symbolp, AFAICT) are trivial.

I still don't understand how this would be able to call interactively
something like:

(count-words-region 234 567 nil)

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