bug#71103: 29.3; hide-ifdef

bug#71103: 29.3; hide-ifdef

[Devon Sean McCullough]

$ Open -n -a /Applications/Emacs.app --args -Q --eval '(find-file 
"/tmp/c.c")' --eval '(insert "int one;\n#ifdef X\nint two;\n#else\nint 
three;\n#endif\nint four;\n")' --eval '(set-buffer-modified-p nil)' -f 
hide-ifdef-mode

Buffer c.c displays

int one;
#ifdef X
int two;
#else
int three;
#endif
int four;

but one of those lines should be invisible.

In GNU Emacs 29.3 (build 1, x86_64-apple-darwin18.7.0, NS appkit-1671.60
  Version 10.14.6 (Build 18G9323)) of 2024-03-24 built on
  builder10-14.lan
Windowing system distributor 'Apple', version 10.3.1671
System Description:  Mac OS X 10.14.6

Configured using:
  'configure --with-ns '--enable-locallisppath=/Library/Application
  Support/Emacs/${version}/site-lisp:/Library/Application
  Support/Emacs/site-lisp' --with-modules 'CFLAGS=-DFD_SETSIZE=10000
  -DDARWIN_UNLIMITED_SELECT' --with-x-toolkit=no'

Configured features:
ACL GLIB GMP GNUTLS JPEG JSON LIBXML2 MODULES NOTIFY KQUEUE NS PDUMPER
PNG RSVG SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER ZLIB

Important settings:
   value of $LANG: en_US.UTF-8
   locale-coding-system: utf-8-unix

Major mode: C/*l

Minor modes in effect:
   hide-ifdef-mode: t
   tooltip-mode: t
   global-eldoc-mode: t
   show-paren-mode: t
   electric-indent-mode: t
   mouse-wheel-mode: t
   tool-bar-mode: t
   menu-bar-mode: t
   file-name-shadow-mode: t
   global-font-lock-mode: t
   font-lock-mode: t
   blink-cursor-mode: t
   line-number-mode: t
   indent-tabs-mode: t
   transient-mark-mode: t
   auto-composition-mode: t
   auto-encryption-mode: t
   auto-compression-mode: t
   abbrev-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message mailcap yank-media puny dired
dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg rfc6068
epg-config gnus-util text-property-search time-date subr-x mm-decode
mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader
sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils hideif
cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine
cc-vars cc-defs cl-loaddefs cl-lib rmc iso-transl tooltip cconv eldoc
paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode
mwheel term/ns-win ns-win ucs-normalize mule-util term/common-win
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 kqueue
cocoa ns multi-tty make-network-process emacs)

Memory information:
((conses 16 59916 6267)
  (symbols 48 6998 0)
  (strings 32 19693 2441)
  (string-bytes 1 727677)
  (vectors 16 13704)
  (vector-slots 8 195944 15168)
  (floats 8 26 37)
  (intervals 56 251 0)
  (buffers 984 11))

bug#71103: 29.3; hide-ifdef

[Eli Zaretskii]

> Date: Tue, 21 May 2024 17:16:46 -0500
> From: Devon Sean McCullough <Emacs-hacker2023@jovi.net>
> 
> $ Open -n -a /Applications/Emacs.app --args -Q --eval '(find-file 
> "/tmp/c.c")' --eval '(insert "int one;\n#ifdef X\nint two;\n#else\nint 
> three;\n#endif\nint four;\n")' --eval '(set-buffer-modified-p nil)' -f 
> hide-ifdef-mode
> 
> Buffer c.c displays
> 
> int one;
> #ifdef X
> int two;
> #else
> int three;
> #endif
> int four;
> 
> but one of those lines should be invisible.

Should it?  Since hide-ifdef-initially is nil by default, the initial
display hides nothing.  If you type "M-x hide-ifdefs", it will hide
some of the #ifdefs.

I see no bug here.