From: Thierry Volpiatto <thievol@posteo.net>
To: Stefan Kangas <stefankangas@gmail.com>
Cc: Eli Zaretskii <eliz@gnu.org>,
visuweshm@gmail.com, luangruo@yahoo.com, emacs-devel@gnu.org
Subject: Re: Make format-spec accept a function as the substitution
Date: Thu, 29 Sep 2022 06:57:07 +0000 [thread overview]
Message-ID: <87fsgatzvo.fsf@posteo.net> (raw)
In-Reply-To: <CADwFkm=d5tieKrDSw3F+fPMRmwdMn+nxiEE9k4FAhjF0TL3_2A@mail.gmail.com>
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Hello Stefan,
Stefan Kangas <stefankangas@gmail.com> writes:
> Eli Zaretskii <eliz@gnu.org> writes:
>
>> And then I'd suggest something like
>>
>> If the substitution for a specification character is a function, the
>> function will be called only if FORMAT uses that character.
>
> Thanks. Please find attached a complete patch with documentation.
>
> [2. text/x-diff; 0001-Make-format-spec-support-functions.patch]...
After thinking at it, it would be great to allow using interactive calls
in specs without wrapping them inside a function:
Using this should ask for line number and file:
(format-spec "Go to line %n in file %f %g" '((?n . (read-number "Number: "))
(?g . "now")
(?f . (read-file-name "File: "))))
Whereas using this should not ask for anything:
(format-spec "Go to line %g" '((?n . (read-number "Number: "))
(?g . "now")
(?f . (read-file-name "File: "))))
For this specs should be looked one by one and evaluated when needed,
here a naive version of format-spec that allow this (doesn't handle 0,
space, -_> etc..):
(defun tv/format-spec-1 (format spec)
(cl-loop with fma = format
with result
for (char . val) in spec
for target = (if (string-match "%\\([[:alpha:]]\\)" fma)
(string-to-char (match-string 1 fma))
fma)
if (eq target char)
return (eval val t)
finally return target))
(defun tv/format-spec (format spec)
(let (strs fmt-str)
(with-temp-buffer
(save-excursion
(insert format))
(setq strs (cl-loop while (re-search-forward "%\\([[:alpha:]]\\)" nil t)
collect (match-string 0)
do (replace-match "s" nil nil nil 1)))
(setq fmt-str (buffer-string)))
(apply #'format fmt-str
(cl-loop for str in strs
collect (tv/format-spec-1 str spec)))))
Probably the idea handled by this code could be ported to format-spec?
--
Thierry
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next prev parent reply other threads:[~2022-09-29 6:57 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <166336105908.23797.12319380359602540227@vcs2.savannah.gnu.org>
[not found] ` <20220916204419.B124FC00872@vcs2.savannah.gnu.org>
2022-09-17 2:00 ` master fe7c015b20: Support XFCE in wallpaper.el Po Lu
2022-09-17 18:03 ` Stefan Kangas
2022-09-18 1:18 ` Po Lu
2022-09-18 2:13 ` Po Lu
2022-09-18 4:48 ` Thierry Volpiatto
2022-09-18 5:15 ` Po Lu
2022-09-18 14:44 ` Thierry Volpiatto
2022-09-19 4:49 ` Po Lu
2022-09-19 6:06 ` Thierry Volpiatto
2022-09-19 7:24 ` Po Lu
2022-09-19 8:40 ` Thierry Volpiatto
2022-09-19 8:52 ` Po Lu
2022-09-19 17:46 ` Thierry Volpiatto
2022-09-19 18:05 ` Thierry Volpiatto
2022-09-19 18:59 ` Stefan Kangas
2022-09-19 20:16 ` Tomas Hlavaty
2022-09-19 21:19 ` Stefan Monnier
2022-09-20 6:16 ` Thierry Volpiatto
2022-09-20 2:32 ` Eli Zaretskii
2022-09-20 2:43 ` Po Lu
2022-09-20 6:25 ` Thierry Volpiatto
2022-09-20 8:22 ` Po Lu
2022-09-19 7:23 ` Thierry Volpiatto
2022-09-26 19:42 ` Stefan Kangas
2022-09-26 21:01 ` Stephen Berman
2022-09-26 22:46 ` Stefan Kangas
2022-09-27 7:17 ` Stephen Berman
2022-09-27 7:45 ` Po Lu
2022-09-27 13:42 ` Stefan Kangas
2022-09-27 0:33 ` Po Lu
2022-09-27 5:56 ` Eli Zaretskii
2022-09-27 6:13 ` Po Lu
2022-09-27 6:45 ` Eli Zaretskii
2022-09-27 7:50 ` Po Lu
2022-09-27 7:56 ` Eli Zaretskii
2022-09-27 8:31 ` Po Lu
2022-09-27 7:21 ` Thierry Volpiatto
2022-09-27 7:42 ` Po Lu
2022-09-27 7:55 ` Thierry Volpiatto
2022-09-27 8:35 ` Po Lu
2022-09-27 18:33 ` Stefan Kangas
2022-09-28 0:34 ` Po Lu
2022-09-27 13:57 ` Stefan Kangas
2022-09-27 15:43 ` Visuwesh
2022-09-27 16:19 ` Stefan Kangas
2022-09-27 16:39 ` Thierry Volpiatto
2022-09-27 16:40 ` Eli Zaretskii
2022-09-27 17:01 ` Stefan Kangas
2022-09-27 17:14 ` Eli Zaretskii
2022-09-27 18:02 ` Make format-spec accept a function as the substitution Stefan Kangas
2022-09-29 6:57 ` Thierry Volpiatto [this message]
2022-09-29 12:36 ` Stefan Monnier
2022-09-29 12:59 ` Stefan Kangas
2022-09-29 15:02 ` Philip Kaludercic
2022-09-29 16:34 ` Stefan Kangas
2022-09-29 16:53 ` Philip Kaludercic
2022-09-29 17:06 ` Stefan Kangas
2022-09-29 16:56 ` Stefan Monnier
2022-09-29 15:09 ` Thierry Volpiatto
2022-09-29 16:34 ` Stefan Kangas
2022-09-29 14:16 ` master fe7c015b20: Support XFCE in wallpaper.el Stefan Kangas
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