GNU bug report logs - #61244
30.0.50; [PATCH] Promote called-interactively-p

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: dick.r.chiang <at> gmail.com
Subject: bug#61244: closed (Re: bug#61244: 30.0.50; [PATCH] Promote
 called-interactively-p)
Date: Sun, 23 Feb 2025 01:32:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#61244: 30.0.50; [PATCH] Promote called-interactively-p

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 61244 <at> debbugs.gnu.org.

-- 
61244: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=61244
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Stefan Kangas <stefankangas <at> gmail.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 61244-done <at> debbugs.gnu.org
Subject: Re: bug#61244: 30.0.50; [PATCH] Promote called-interactively-p
Date: Sun, 23 Feb 2025 01:31:33 +0000

Stefan Kangas <stefankangas <at> gmail.com> writes:

> Stefan Monnier <monnier <at> iro.umontreal.ca> writes:
>
>>> FUD surrounding `called-interactively-p` continues to saddle functions
>>> with an incongruous "interactive-p" optional argument.
>>
>> If the arg is called `interactive-p` it's usually because the programmer
>> was too lazy to think about a good name for that arg (one which actually
>> describes the effect it has).
>>
>> Maybe in our recommendation for the use of an extra argument, we should
>> make an effort to mention that (i.e. that we recommend that the arg's
>> name reflect the effect, and that the docstring document it
>> accordingly).
>>
>>> `called-interactively-p` is safe enough,
>>
>> I agree that `called-interactively-p` is safe: nothing bad will result
>> if you call it.  But its return value is unreliable (when it returns
>> non-nil, I think it *is* reliable, but in many cases it will return nil
>> even tho it "should" return non-nil).
>>
>>> +runtime links one to the other.  When @code{called-interactively-p} is
>>> +invoked, tracing the stack frame of the subject function is fraught
>>> +given how many intervening function calls could result from arbitrary
>>> +macro expansions, special forms, and advices including those for
>>> +debugging instrumentation.  The heuristics applied cannot guarantee a
>>> +correct result under all conceivable conditions.
>>
>> Clearly, we agree on the technical aspect.
>> We just disagree about what conclusion to draw from it.
>>
>> I personally can't recommend the use of a function for which we "cannot
>> guarantee a correct result under all conceivable conditions" when there
>> is a good alternative which does.
>>
>>> +  "Return t if the containing function was called interactively.
>>> +Be warned the function may yield an incorrect result when the
>>> +containing function is advised or instrumented for debugging, or
>>> +when the call to `called-interactively-p' is enclosed in
>>> +macros or special forms which wrap it in a lambda closure.
>>> +
>>> +If knowing the calling context is critical, one must modify the
>>> +containing function's lexical environment as described in Info
>>> +node `(elisp)Distinguish Interactive'.
>>> +
>>> +If KIND is \\='interactive, the function returns nil if either
>>> +`executing-kbd-macro' or `noninteractive' is true.  The KIND
>>> +argument is deprecated in favor of checking those conditions
>>> +outside this function."
>>> +  (let ((kind-exception (and (eq kind 'interactive)
>>> +                             (or noninteractive executing-kbd-macro))))
>>> +    (unless kind-exception
>>> +      ;; Call stack grows down with decreasing I.
>>> +      ;; Walk up stack until containing function's frame reached.
>>> +      (let* ((i 0)
>>> +             (child (backtrace-frame i 'called-interactively-p))
>>> +             (parent (backtrace-frame (1+ i) 'called-interactively-p))
>>> +             (walk-up-stack
>>> +              (lambda ()
>>> +                (setq i (1+ i)
>>> +                      child parent
>>> +                      parent (backtrace-frame (1+ i) 'called-interactively-p)))))
>>> +        (while (progn (funcall walk-up-stack)
>>> +                      (or
>>> +                       ;; Skip special forms from non-compiled code.
>>> +                       (and child (null (car child)))
>>> +                       ;; Skip package-specific stack-frames.
>>> +                       (let ((skip (run-hook-with-args-until-success
>>> +                                    'called-interactively-p-functions
>>> +                                    (+ i 2) child parent)))
>>> +                         (pcase skip
>>> +                           ('nil nil)
>>> +                           (0 t)
>>> +                           (_ (setq i (1- (+ i skip)))
>>> +                              (funcall walk-up-stack)))))))
>>> +        ;; CHILD should now be containing function.
>>> +        (pcase (cons child parent)
>>> +          ;; checks if CHILD is built-in primitive (never interactive).
>>> +          (`((,_ ,(pred (lambda (f) (subr-primitive-p (indirect-function f)))) . ,_) . ,_)
>>> +           nil)
>>> +          ;; checks if PARENT is `funcall_interactively'.
>>> +          (`(,_ . (t ,(pred (lambda (f)
>>> +                              (eq internal--funcall-interactively
>>> +                                  (indirect-function f))))
>>> +                     . ,_))
>>> +           t))))))
>>
>> You describe this change as "Clarify".  I don't immediately see whether
>> the code does the same as before nor in which sense it's more clear.
>> Can you describe a bit more precisely what changes you've made here?
>> I see you renamed the frames to `child` and `parent`, which doesn't
>> sound too bad.
>>
>> [ One cosmetic thing I notice is that I was careful to have a single
>>   copy of (backtrace-frame i 'called-interactively-p) whereas you now
>>   have 3 of them.  ]
>>
>>> +(define-obsolete-function-alias 'interactive-p
>>> +  #'called-interactively-p "23.2"
>>> +  "Keep alias (https://lists.gnu.org/r/emacs-devel/2020-08/msg00564.html)")
>>
>> I don't have an opinion on that.
>>
>>> -/* BEWARE: Calling this directly from C would defeat the purpose!  */
>>>  DEFUN ("funcall-interactively", Ffuncall_interactively, Sfuncall_interactively,
>>> -       1, MANY, 0, doc: /* Like `funcall' but marks the call as interactive.
>>> -I.e. arrange that within the called function `called-interactively-p' will
>>> -return non-nil.
>>> +       1, MANY, 0, doc: /* Differentiate from `funcall' to indicate interactive call.
>>> +The function `called-interactively-p' looks for this very function token.
>>> +This primitive should not be called from C since its very purpose
>>> +is to appear as a literal token in the lisp call stack.
>>>  usage: (funcall-interactively FUNCTION &rest ARGUMENTS)  */)
>>>       (ptrdiff_t nargs, Lisp_Object *args)
>>>  {
>>>    specpdl_ref speccount = SPECPDL_INDEX ();
>>>    temporarily_switch_to_single_kboard (NULL);
>>> -
>>> -  /* Nothing special to do here, all the work is inside
>>> -     `called-interactively-p'.  Which will look for us as a marker in the
>>> -     backtrace.  */
>>>    return unbind_to (speccount, Ffuncall (nargs, args));
>>>  }
>>
>> No clear opinion on this either.  I like when comments are replaced by
>> actual documentation, but we usually don't put into docstrings info
>> about whether a function can be called from C (docstrings are meant for
>> ELisp callers only).
>>
>>> diff --git a/test/lisp/emacs-lisp/edebug-resources/edebug-test-code.el b/test/lisp/emacs-lisp/edebug-resources/edebug-test-code.el
>>> index b0211c915e6..b033fdddcd8 100644
>>> --- a/test/lisp/emacs-lisp/edebug-resources/edebug-test-code.el
>>> +++ b/test/lisp/emacs-lisp/edebug-resources/edebug-test-code.el
>>> @@ -33,6 +33,10 @@ edebug-test-code-fac
>>>        (* n (edebug-test-code-fac (1- n)))!mult!
>>>      1))
>>>
>>> +(defun edebug-test-code-called-interactively-p ()
>>> +  (interactive)
>>> +  !start!(called-interactively-p))
>>> +
>>>  (defun edebug-test-code-concat (a b flag)
>>>    !start!(if flag!flag!
>>>        !then-start!(concat a!then-a! b!then-b!)!then-concat!
>>> diff --git a/test/lisp/emacs-lisp/edebug-tests.el b/test/lisp/emacs-lisp/edebug-tests.el
>>> index de2fff5ef19..72ea5874cae 100644
>>> --- a/test/lisp/emacs-lisp/edebug-tests.el
>>> +++ b/test/lisp/emacs-lisp/edebug-tests.el
>>> @@ -56,6 +56,7 @@ edebug-tests-failure-in-post-command
>>>  (defvar-keymap edebug-tests-keymap
>>>    :doc "Keys used by the keyboard macros in Edebug's tests."
>>>    "@"       'edebug-tests-call-instrumented-func
>>> +  "#"       'edebug-tests-call-interactively-instrumented-func
>>>    "C-u"     'universal-argument
>>>    "C-p"     'previous-line
>>>    "C-n"     'next-line
>>> @@ -268,6 +269,13 @@ edebug-tests-setup-@
>>>            edebug-tests-args args)
>>>      (setq edebug-tests-@-result 'no-result)))
>>>
>>> +(defun edebug-tests-call-interactively-instrumented-func ()
>>> +  "Call interactively `edebug-tests-func' and save results."
>>> +  (interactive)
>>> +  (let ((result (call-interactively edebug-tests-func)))
>>> +    (should (eq edebug-tests-@-result 'no-result))
>>> +    (setq edebug-tests-@-result result)))
>>> +
>>>  (defun edebug-tests-call-instrumented-func ()
>>>    "Call `edebug-tests-func' with `edebug-tests-args' and save the results."
>>>    (interactive)
>>> @@ -440,6 +448,14 @@ edebug-tests-stop-point-at-start-of-first-instrumented-function
>>>      "SPC" (edebug-tests-should-be-at "fac" "step")
>>>      "g"   (should (equal edebug-tests-@-result 1)))))
>>>
>>> +(ert-deftest edebug-tests-called-interactively-p ()
>>> +  "`called-interactively-p' still works under edebug."
>>> +  (edebug-tests-with-normal-env
>>> +   (edebug-tests-setup-@ "called-interactively-p" '() t)
>>> +   (edebug-tests-run-kbd-macro
>>> +    "#"   (edebug-tests-should-be-at "called-interactively-p" "start")
>>> +    "g"   (should (equal edebug-tests-@-result t)))))
>>> +
>>>  (ert-deftest edebug-tests-step-showing-evaluation-results ()
>>>    "Edebug prints expression evaluation results to the echo area."
>>>    (edebug-tests-with-normal-env
>>
>> Are these new tests things that are fixed by your patch, or they are
>> just new tests "for the sake of it"?
>> [ In either case, I welcome new tests.  ]
>>
>>> diff --git a/test/lisp/emacs-lisp/nadvice-tests.el b/test/lisp/emacs-lisp/nadvice-tests.el
>>> index 748d42f2120..77df743a3e2 100644
>>> --- a/test/lisp/emacs-lisp/nadvice-tests.el
>>> +++ b/test/lisp/emacs-lisp/nadvice-tests.el
>>> @@ -145,9 +145,8 @@ advice-test-called-interactively-p-around
>>>
>>>  (ert-deftest advice-test-called-interactively-p-filter-args ()
>>>    "Check interaction between filter-args advice and called-interactively-p."
>>> -  :expected-result :failed
>>>    (defun sm-test7.3 () (interactive) (cons 1 (called-interactively-p)))
>>> -  (advice-add 'sm-test7.3 :filter-args #'list)
>>> +  (advice-add 'sm-test7.3 :filter-args #'identity)
>>>    (should (equal (sm-test7.3) '(1 . nil)))
>>>    (should (equal (call-interactively 'sm-test7.3) '(1 . t))))
>>
>> Duh!  Thanks.
>>
>>> @@ -163,6 +162,18 @@ advice-test-call-interactively
>>>        (advice-remove 'call-interactively #'ignore)
>>>        (should (eq (symbol-function 'call-interactively) old)))))
>>>
>>> +(ert-deftest advice-test-called-interactively-p-around-careful ()
>>> +  "Like sm-test7.2 but defensively preserve interactive context."
>>> +  (defun sm-test7.5 () (interactive) (cons 1 (called-interactively-p)))
>>> +  (advice-add 'sm-test7.5 :around
>>> +              (lambda (f &rest args)
>>> +                (list (cons 1 (called-interactively-p))
>>> +                      (if (called-interactively-p)
>>> +                          (call-interactively f)
>>> +                        (apply f args)))))
>>> +  (should (equal (sm-test7.5) '((1 . nil) (1 . nil))))
>>> +  (should (equal (call-interactively 'sm-test7.5) '((1 . t) (1 . t)))))
>>> +
>>>  (ert-deftest advice-test-interactive ()
>>>    "Check handling of interactive spec."
>>>    (defun sm-test8 (a) (interactive "p") a)
>>
>> I'd use `funcall-interactively` rather than `call-interactively` so as
>> to correctly preserve `args` rather than recreate them.
>>
>>
>>         Stefan
>
> dick, could you please look into and reply to Stefan M's comments above?
>
> Thanks in advance.

I guess we're not going to get any reply here.

I'm therefore closing this bug report.

[Message part 3 (message/rfc822, inline)]

From: dick.r.chiang <at> gmail.com
To: bug-gnu-emacs <bug-gnu-emacs <at> gnu.org>
Subject: 30.0.50; [PATCH] Promote called-interactively-p
Date: Thu, 02 Feb 2023 16:32:32 -0500

[Message part 4 (text/plain, inline)]

FUD surrounding `called-interactively-p` continues to saddle
functions with an incongruous "interactive-p" optional
argument.  `called-interactively-p` is safe enough, and if not,
no one is going to miss whatever trivial behaviors hinge
on its correctness.

[0001-Promote-called-interactively-p.patch (text/x-diff, attachment)]

[Message part 6 (text/plain, inline)]

In Commercial Emacs 0.3.1snapshot b8701a3 in dev (upstream 30.0.50,
x86_64-pc-linux-gnu) built on dick
Repository revision: b8701a32dad52e26fcf72ce39c9b631c777a1927
Repository branch: dev
Windowing system distributor 'The X.Org Foundation', version 11.0.12101003
System Description: Ubuntu 22.04.1 LTS

Configured using:
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/home/dick/.emacs.d/elpa/chess-2.0.5/chess-sjeng hides /home/dick/.local/share/emacs/site-lisp/chess-sjeng
/home/dick/.emacs.d/elpa/chess-2.0.5/chess-algebraic hides /home/dick/.local/share/emacs/site-lisp/chess-algebraic
/home/dick/.emacs.d/elpa/transient-0.3.7snapshot/transient hides /home/dick/.local/share/emacs/0.3.1/lisp/transient
/home/dick/.emacs.d/elpa/use-package-20200520.2305/use-package-bind-key hides /home/dick/.local/share/emacs/0.3.1/lisp/use-package/use-package-bind-key
/home/dick/.emacs.d/elpa/use-package-20200520.2305/use-package-lint hides /home/dick/.local/share/emacs/0.3.1/lisp/use-package/use-package-lint
/home/dick/.emacs.d/elpa/use-package-20200520.2305/use-package-core hides /home/dick/.local/share/emacs/0.3.1/lisp/use-package/use-package-core
/home/dick/.emacs.d/elpa/use-package-20200520.2305/use-package-ensure hides /home/dick/.local/share/emacs/0.3.1/lisp/use-package/use-package-ensure
/home/dick/.emacs.d/elpa/bind-key-20161218.1520/bind-key hides /home/dick/.local/share/emacs/0.3.1/lisp/use-package/bind-key
/home/dick/.emacs.d/elpa/use-package-20200520.2305/use-package-jump hides /home/dick/.local/share/emacs/0.3.1/lisp/use-package/use-package-jump
/home/dick/.emacs.d/elpa/use-package-20200520.2305/use-package-diminish hides /home/dick/.local/share/emacs/0.3.1/lisp/use-package/use-package-diminish
/home/dick/.emacs.d/elpa/use-package-20200520.2305/use-package hides /home/dick/.local/share/emacs/0.3.1/lisp/use-package/use-package
/home/dick/.emacs.d/elpa/use-package-20200520.2305/use-package-delight hides /home/dick/.local/share/emacs/0.3.1/lisp/use-package/use-package-delight
/home/dick/.emacs.d/elpa/eglot-1.8/eglot hides /home/dick/.local/share/emacs/0.3.1/lisp/progmodes/eglot
/home/dick/.emacs.d/elpa/soap-client-3.1.5/soap-client hides /home/dick/.local/share/emacs/0.3.1/lisp/net/soap-client
/home/dick/.emacs.d/elpa/soap-client-3.1.5/soap-inspect hides /home/dick/.local/share/emacs/0.3.1/lisp/net/soap-inspect
/home/dick/.emacs.d/elpa/let-alist-1.0.6/let-alist hides /home/dick/.local/share/emacs/0.3.1/lisp/emacs-lisp/let-alist

Features:
(shadow bbdb-message footnote emacsbug company-oddmuse company-keywords
company-etags company-gtags company-dabbrev-code company-dabbrev
company-files company-clang company-cmake company-semantic
company-template company-bbdb cc-mode cc-fonts cc-guess cc-menus cc-cmds
cc-styles cc-align cc-engine cc-vars cc-defs texinfo texinfo-loaddefs
git-rebase vc tramp-archive tramp-gvfs tramp-cache time-stamp zeroconf
tramp tramp-loaddefs trampver tramp-integration cus-start files-x
tramp-compat ls-lisp shr-color qp goto-addr gravatar dns magit-extras
mule-util jka-compr face-remap magit-patch-changelog magit-patch
magit-submodule magit-obsolete magit-blame magit-stash magit-reflog
magit-bisect magit-push magit-pull magit-fetch magit-clone magit-remote
magit-commit magit-sequence magit-notes magit-worktree magit-tag
magit-merge magit-branch magit-reset magit-files magit-refs magit-status
magit magit-repos magit-apply magit-wip magit-log which-func imenu
magit-diff smerge-mode diff git-commit log-edit pcvs-util add-log
magit-core magit-autorevert magit-margin magit-transient magit-process
with-editor shell pcomplete server magit-mode transient magit-git
magit-base magit-section format-spec misearch multi-isearch vc-git
diff-mode vc-dispatcher tree-sitter bug-reference vc-svn elpaso
elpaso-admin elpaso-milky elpaso-defs shortdoc cal-menu calendar
cal-loaddefs gnus-html url-queue help-fns radix-tree sort smiley
flow-fill mm-archive mail-extr textsec uni-scripts idna-mapping
ucs-normalize uni-confusable textsec-check gnus-async gnus-ml
gnus-notifications gnus-fun notifications gnus-kill gnus-dup disp-table
utf-7 url-cache benchmark nnrss nnfolder nndiscourse rbenv nnhackernews
nntwitter nntwitter-api bbdb-gnus gnus-demon nntp nnmairix nnml nnreddit
gnus-topic url-http url-auth url-gw network-stream nsm request
virtualenvwrapper gud s dash json-rpc python compat gnus-score
score-mode gnus-bcklg gnus-srvr gnus-cite anaphora bbdb-mua bbdb-com crm
bbdb bbdb-site timezone gnus-delay gnus-draft gnus-cache gnus-agent
gnus-msg gnus-art mm-uu mml2015 mm-view mml-smime smime gnutls dig
gnus-sum shr pixel-fill kinsoku url-file svg dom nndraft nnmh gnus-group
mm-url gnus-undo use-package use-package-ensure use-package-delight
use-package-diminish gnus-start gnus-dbus dbus xml gnus-cloud nnimap
nnmail mail-source utf7 nnoo parse-time iso8601 gnus-spec gnus-int
gnus-range message sendmail yank-media puny dired-x dired dired-loaddefs
rfc822 mml mml-sec epa epg rfc6068 epg-config mm-decode mm-bodies
mm-encode mail-parse rfc2231 rfc2047 rfc2045 ietf-drums mailabbrev
gmm-utils mailheader gnus-win paredit-ext paredit inf-ruby ruby-mode
smie haskell-interactive-mode haskell-presentation-mode haskell-process
haskell-session haskell-compile haskell-mode haskell-cabal haskell-utils
haskell-font-lock haskell-indentation haskell-string
haskell-sort-imports haskell-lexeme rx haskell-align-imports
haskell-complete-module haskell-ghc-support noutline outline
flymake-proc flymake etags fileloop generator dabbrev haskell-customize
solarized-theme solarized-definitions projectile lisp-mnt ibuf-ext
ibuffer ibuffer-loaddefs thingatpt grep compile comint ansi-osc
ansi-color gnus nnheader range mail-utils mm-util mail-prsvr gnus-util
text-property-search time-date xlsp xlsp-xref xlsp-server xlsp-company
company-capf company xlsp-handle-notification xlsp-handle-request
xlsp-struct xlsp-utils jsonrpc pcase warnings hl-line autorevert
filenotify flx-ido flx google-translate-default-ui
google-translate-core-ui facemenu color ido google-translate-core
google-translate-tk google-translate-backend auto-complete advice popup
cus-edit pp cus-load icons wid-edit emms-player-mplayer
emms-player-simple emms emms-compat winner edmacro kmacro cl-extra
help-mode xref project ring use-package-bind-key bind-key easy-mmode
use-package-core derived company-go-autoloads wordnut-autoloads
quelpa-autoloads haskell-mode-autoloads xlsp-autoloads debbugs-autoloads
eglot-autoloads emacsql-autoloads corfu-autoloads elpaso-disc-autoloads
elpaso-autoloads find-func sml-mode-autoloads json-reformat-autoloads
typescript-mode-autoloads projectile-autoloads nnreddit-autoloads
json-snatcher-autoloads yasnippet-autoloads
tornado-template-mode-autoloads flycheck-autoloads request-autoloads
lsp-mode-autoloads lv-autoloads lsp-bridge-autoloads posframe-autoloads
magit-autoloads magit-section-autoloads cask-autoloads epl-autoloads
markdown-mode-autoloads go-mode-autoloads dash-autoloads
company-autoloads git-commit-autoloads info compat-autoloads package
browse-url url url-proxy url-privacy url-expand url-methods url-history
url-cookie generate-lisp-file url-domsuf url-util mailcap url-handlers
url-parse auth-source cl-seq eieio eieio-core cl-macs password-cache
json subr-x map byte-opt gv bytecomp byte-compile cldefs url-vars
cl-loaddefs cl-lib rmc iso-transl tooltip cconv eldoc paren electric
uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel
term/x-win x-win term/common-win x-dnd tool-bar dnd fontset image
regexp-opt fringe tabulated-list replace newcomment text-mode lisp-mode
prog-mode register page tab-bar menu-bar rfn-eshadow isearch easymenu
timer select scroll-bar mouse jit-lock font-lock syntax font-core
term/tty-colors frame minibuffer nadvice seq simple cl-generic
indonesian philippine cham georgian utf-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek
romanian slovak czech european ethiopic indian cyrillic chinese
composite emoji-zwj charscript charprop case-table epa-hook
jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs
theme-loaddefs faces cus-face macroexp files window text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget keymap
hashtable-print-readable backquote threads dbusbind inotify lcms2
dynamic-setting system-font-setting font-render-setting cairo
move-toolbar gtk x-toolkit xinput2 x multi-tty make-network-process
emacs)

Memory information:
((conses 16 1137562 104422)
 (symbols 48 48318 2)
 (strings 32 221450 44809)
 (string-bytes 1 6892398)
 (vectors 16 136619)
 (vector-slots 8 3121891 105090)
 (floats 8 1271 1705)
 (intervals 56 19769 1249)
 (buffers 984 46))

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GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.