Re: From macros to elisp programming?

[Eduardo Ochs]

On Mon, 6 Dec 2021 at 10:43, Ypo <ypuntot@gmail.com> wrote:
>
> Hi
>
> I am able to make macros, but I think I am far away from Lisp programming.
>
> Is there a path to go from macros to elisp programming? For example, the last 
> macro I've made is for transforming the name of some headlines, adding in 
> front of them a part from the previous headline. This is the elisp code of 
> the macro:
>
> #+BEGIN_SRC
> (fset 'SanzTema5
>    (kmacro-lambda-form [?\C-a ?\M-f ?\M-b ?\C-  ?\M-f ?\M-f ?\M-f ?\M-f ?\M-f 
> ?\M-f ?\M-f ?\M-f ?\M-f ?\M-w ?\C-c ?\C-n ?\C-a ?\M-f ?\M-b ?\C-y ?  ?- ?  
> ?\C-e ?\M-b ?\M-f ?\"] 0 "%d"))
> #+END_SRC
>
>
> Using that code, from these headlines:
>
> *** Sanz Aparicio et al. (2019) "5 Los Motivos Adquiridos, Menéndez Balaña" 
> (pp. 95-118)
> **** INTRODUCCIÓN
>
> I get modified the second headline:
>
> *** Sanz Aparicio et al. (2019) "5 Los Motivos Adquiridos, Menéndez Balaña" 
> (pp. 95-118)
> **** Sanz Aparicio et al. (2019) "5 Los Motivos Adquiridos - INTRODUCCIÓN"
>
>
> Are macros near to elisp programming or they are two different worlds?
>
> Ypo


Hi Ypo,

here's a suggestion. If you run this

  (setq last-kbd-macro [?\C-a ?\M-f ?\M-b ?\C- ?\M-f ?\M-f ?\M-f ?\M-f
    ?\M-f ?\M-f ?\M-f ?\M-f ?\M-f ?\M-w ?\C-c ?\C-n ?\C-a ?\M-f ?\M-b
    ?\C-y ? ?- ? ?\C-e ?\M-b ?\M-f ?\"])

and then type `C-x C-k C-e' (`kmacro-edit-macro-repeat') you will get
a temporary buffer that contains this:

    C-a                     ;; move-beginning-of-line
    M-f                     ;; forward-word
    M-b                     ;; backward-word
    C-SPC                   ;; set-mark-command
    9*M-f                   ;; forward-word
    M-w                     ;; kill-ring-save
    C-c C-n
    C-a                     ;; move-beginning-of-line
    M-f                     ;; forward-word
    M-b                     ;; backward-word
    C-y                     ;; yank
    SPC                     ;; self-insert-command
    -                       ;; self-insert-command
    SPC                     ;; self-insert-command
    C-e                     ;; move-end-of-line
    M-b                     ;; backward-word
    M-f                     ;; forward-word
    "                       ;; self-insert-command

If you convert that by hand - suggestion: use keyboard macros for
that! =) - to a defun like this one,

  (defun SanzTema5 ()
    (interactive)
    (move-beginning-of-line)       ; C-a
    (forward-word)                 ; M-f
    (backward-word)                ; M-b
    (set-mark-command)             ; C-SPC
    (dotimes 9 (forward-word))     ; 9*M-f
    ;; ^ or: (forward-word 9)
    (kill-ring-save)               ; M-w
    ;; What here? I don' have a:   ; C-c C-n
    (move-beginning-of-line)       ; C-a
    (forward-word)                 ; M-f
    (backward-word)                ; M-b
    (yank)                         ; C-y
    (insert " - ")                 ; SPC - SPC
    (move-end-of-line)             ; C-e
    (backward-word)                ; M-b
    (forward-word)                 ; M-f
    (insert "\"")                  ; "
    )

Then you will get a defun that does something that is clearly useful
to you... you can start by creating and debugging a handful of defuns
like that one and then learn what most people consider as "real
Elisp"...

  Cheers =),
    Eduardo Ochs
    http://angg.twu.net/#eev