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* bug#41831: 26.3; Customize UI fails for defcustom with standard default of list heterogenous choice types
@ 2020-06-12 22:12 Pierre Rouleau
  2020-06-18 12:54 ` Mauro Aranda
  0 siblings, 1 reply; 4+ messages in thread
From: Pierre Rouleau @ 2020-06-12 22:12 UTC (permalink / raw)
  To: 41831



- Not a crash issue.

- A potential customize UI problem dealing with lists with a choice of
  element types:
  - Specifying the default values that include elements of
    the first choice type works fine, but
  - Specifying the default value that include elements of the second or
    third choice type makes the *customize* UI report a *mismatch* warning
    and the UI does not allow editing of the value.
    - However, if I set the default to a list of only the types of the
      first choice, and via the *customize* buffer UI (which then works
      OK) I add manually add elements of the second or third choice, the
      UI let me and let me save the values which are then showing inside
      the `custom-set-variables' form properly.
      - Then if I open the *Customize* buffer again I can edit properly:
        I see the first lists of first choice type and the last element
        of the second choice type.

So, to me it would seem that either my data declaration is invalid and
should never be accepted, or I should be able to declare a default that
consists of a list with elements of different types.  But I am not able
to do that.  I first asked on StackExchange where I was answered that
this might be a bug.

My code declarations follows.  Notice the 4 commented-out lines
following the defcustom `standard' argument: if I activate this code
(and update the parens accordingly), the defcustom byte-compiles fine
but *customize* buffer UI fails reporting a mismatch and does not let
edit/delete entries.

;; beginning of code sample -{-

(defcustom pel-key-chords
  '((global "<>" ("<>\C-b"))
    (global             "[]"     ("[]\C-b"))
    (c-mode             "{}"     ("{\n\n}\C-p"))
    (c++-mode           "{}"     ("{\n\n}\C-p")))
  ;; (flyspell-mode    "4r"     flyspell-correct-word-before-point)
  ;; (flyspell-prog-mode "4r"     flyspell-correct-word-before-point)
  ;; (global             "6y"     pel-find-file-at-point-in-window)
  ;; (global             ".;"     pel-search-word-from-top))
  "List of key-chords activated when the key-chord-mode is turned on.
PEL provides a set of defaults.  You can replace, delete or add new
key-chord definitions to this default.

You can define *global* key-chords and mode-specific key-chords.
- Global key-chords are stored in the global key-map.
- Mode-specific key-chords are stored in the mode key-map of
  the specified mode when the mode is entered.

The `pel-key-chords' value is a list of objects.
- Each object is a list of 3 items.
  - The first item is either:
    - global   : this key-chord is global
    - A major mode name that identifies the major mode
      where the key-chord must be activated.
      For example:  c++-mode
  - The second item is the 2 characters used for the key-chord.
    Do not quote the characters.
    You can specify control characters to identify special keys:
    - for <tab>, type: C-q C-i
    - for RET,   type: C-q C-m
    - It's not possible to identify the function keys here.
  - The third item describes the action for the key-chord.
    It can be expressed using one of 3 ways, selected by the
    Value Menu:
    - 0: expansion keys:
         Type the keys you want as replacement. You can
         place several keys on a line, or spread them on several
         lines.  You can identify control keys by entering the
         kbd-style like C-b (by typing 'C', '-', then 'b')
         or by placing the control code by typing C-q C-b.
         Unfortunately it is currently not possible to identify
         a keystroke involving other modifiers or combination of
         modifiers; the PEL code is not able to properly recognize it
         to pass it to the key-chord function.
         Use the lambda form instead.
         BTW, if you know how to fix that please don't hesitate
         to either let me know or submit a pull-request.
    - 1: command:
         Type the name of the Emacs interactive function you want
         to execute when the key-chord is hit.
    - 2: lambda:
         This is the most flexible way.  Here you write any elisp
         code you need inside a lambda expression that take no
         argument.   You can call any elisp function in here."
  :group 'pel-pkg-for-key-chord
  :type '(repeat
          (choice
           (list
            :tag "expansion-keys"
            (symbol       :tag "mode" :value global)
            (string       :tag "chars")
            (repeat
             (key-sequence :tag "key")))
           (list
            :tag "command"
            (symbol       :tag "mode" :value global)
            (string       :tag "chars")
            (function     :tag "command"))
           (list
            :tag "lambda"
            (symbol       :tag "mode" :value global)
            (string       :tag "chars")
            (function     :tag "elisp-code"
                          :value (lambda () (interactive) <YOUR CODE HERE>))))))

;; end of code sample -}-

Thanks!
  




In GNU Emacs 26.3 (build 1, x86_64-apple-darwin18.2.0, NS appkit-1671.20 Version 10.14.3 (Build 18D109))
of 2019-09-02 built on builder10-14.porkrind.org
Windowing system distributor 'Apple', version 10.3.1671
Recent messages:
Wrote /Users/roup/dev/elisp/pel/pel--options.el
Saving file /Users/roup/dev/elisp/pel/pel--options.el...
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Wrote /Users/roup/dev/elisp/pel/pel--options.el
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Wrote /Users/roup/dev/elisp/pel/pel--options.el
Quit [4 times]

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^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-11-03 14:12 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-06-12 22:12 bug#41831: 26.3; Customize UI fails for defcustom with standard default of list heterogenous choice types Pierre Rouleau
2020-06-18 12:54 ` Mauro Aranda
     [not found]   ` <CALTqLiYs63z4x2oxEYMrv=L6nExJj8cYpKqAQPTsavdAWY=CsQ@mail.gmail.com>
2020-08-21 14:30     ` Mauro Aranda
2020-11-03 14:12       ` Mauro Aranda

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