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charset="Windows-1252" Content-Transfer-Encoding: quoted-printable --text follows this line-- In GNU Emacs 29.3 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.41, cairo version 1.18.0) Windowing system distributor 'The X.Org Foundation', version 11.0.12101010 System Description: EndeavourOS Configured using: 'configure --with-x-toolkit=3Dgtk3 --with-native-compilation=3Daot --sysconfdir=3D/etc --prefix=3D/usr --libexecdir=3D/usr/lib --with-tree-sitter --localstatedir=3D/var --with-cairo --disable-build-details --with-harfbuzz --with-libsystemd --with-modules 'CFLAGS=3D-march=3Dx86-64 -mtune=3Dgeneric -O2 -pipe -fno-p= lt -fexceptions -Wp,-D_FORTIFY_SOURCE=3D2 -Wformat -Werror=3Dformat-security -fstack-clash-protection -fcf-protection -g -ffile-prefix-map=3D/build/emacs/src=3D/usr/src/debug/emacs -flto=3Dauto' 'LDFLAGS=3D-Wl,-O1 -Wl,--sort-common -Wl,--as-needed -Wl,-z,relro -Wl,-z,now -Wl,-z,pack-relative-relocs -flto=3Dauto' 'CXXFLAGS=3D-march=3Dx86-64 -mtune=3Dgeneric -O2 -pipe -fno-plt -fexceptio= ns -Wp,-D_FORTIFY_SOURCE=3D2 -Wformat -Werror=3Dformat-security -fstack-clash-protection -fcf-protection -Wp,-D_GLIBCXX_ASSERTIONS -g -ffile-prefix-map=3D/build/emacs/src=3D/usr/src/debug/emacs -flto=3Dauto'' Configured features: ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG JSON LCMS2 LIBOTF LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER WEBP X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB Important settings: value of $LC_MONETARY: es_ES.UTF-8 value of $LC_NUMERIC: es_ES.UTF-8 value of $LC_TIME: es_ES.UTF-8 value of $LANG: en_GB.UTF-8 locale-coding-system: utf-8-unix Major mode: Lisp Interaction Minor modes in effect: tooltip-mode: t global-eldoc-mode: t 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 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 mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs comp comp-cstr warnings icons subr-x rx cl-seq cl-macs gv cl-extra help-mode bytecomp byte-compile cl-lib sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils 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 native-compile emacs) Memory information: ((conses 16 77244 5722) (symbols 48 7141 0) (strings 32 19706 2242) (string-bytes 1 597786) (vectors 16 15776) (vector-slots 8 329999 11158) (floats 8 27 46) (intervals 56 262 0) (buffers 984 11)) The info page "Predicates on Lists" has a section on `null` which is confusing. It says: =85as a matter of clarity we use null when object is considered a list and not when it is considered a truth value=85 But my understanding is that we also use null when object is considered a non-boolean value. E.g. if `foo` could be `red` `green` or `nil` then `foo` is neither a list nor a truth value. The info page made me think I should use `not` rather than `null`, but upon further research, it looks like `null` is fine for checking for `nil` when `nil` isn't used to represent falsity. I would suggested rewording the info page to read as so: =85as a matter of clarity we use null when object is considered a list or other non-boolean value. We use not when object is considered a boolean value=85 It may also be helpful to change the section on `not` in "Constructs for Combining Conditions": =85we recommend using the name null if you are testing for an empty list or other non-boolean nil. Thanks for your consideration. Tom Dalziel --_000_VI1P194MB2166F15F2124CB6BEDC35E5CEE092VI1P194MB2166EURP_ Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable <html> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1= 252"> <style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo= ttom:0;} </style> </head> <body dir=3D"ltr"> <div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san= s-serif; font-size: 12pt; color: rgb(0, 0, 0);"> --text follows this line--</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> In GNU Emacs 29.3 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.41,</div= > <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> cairo version 1.18.0)</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> Windowing system distributor 'The X.Org Foundation', version 11.0.12101010<= /div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> System Description: EndeavourOS</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> Configured using:</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> 'configure --with-x-toolkit=3Dgtk3 --with-native-compilation=3Daot</d= iv> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> --sysconfdir=3D/etc --prefix=3D/usr --libexecdir=3D/usr/lib</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> --with-tree-sitter --localstatedir=3D/var --with-cairo</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> --disable-build-details --with-harfbuzz --with-libsystemd</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> --with-modules 'CFLAGS=3D-march=3Dx86-64 -mtune=3Dgeneric -O2 -pipe -= fno-plt</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> -fexceptions -Wp,-D_FORTIFY_SOURCE=3D2 -Wformat -Werror=3Dformat-secu= rity</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> -fstack-clash-protection -fcf-protection -g</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> -ffile-prefix-map=3D/build/emacs/src=3D/usr/src/debug/emacs -flto=3Da= uto'</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> 'LDFLAGS=3D-Wl,-O1 -Wl,--sort-common -Wl,--as-needed -Wl,-z,relro</di= v> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> -Wl,-z,now -Wl,-z,pack-relative-relocs -flto=3Dauto'</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> 'CXXFLAGS=3D-march=3Dx86-64 -mtune=3Dgeneric -O2 -pipe -fno-plt -fexc= eptions</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> -Wp,-D_FORTIFY_SOURCE=3D2 -Wformat -Werror=3Dformat-security</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> -fstack-clash-protection -fcf-protection -Wp,-D_GLIBCXX_ASSERTIONS -g= </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> -ffile-prefix-map=3D/build/emacs/src=3D/usr/src/debug/emacs -flto=3Da= uto''</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> Configured features:</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG</di= v> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> JSON LCMS2 LIBOTF LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY</d= iv> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> TOOLKIT_SCROLL_BARS TREE_SITTER WEBP X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB</di= v> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> Important settings:</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> value of $LC_MONETARY: es_ES.UTF-8</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> value of $LC_NUMERIC: es_ES.UTF-8</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> value of $LC_TIME: es_ES.UTF-8</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> value of $LANG: en_GB.UTF-8</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> locale-coding-system: utf-8-unix</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> Major mode: Lisp Interaction</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> Minor modes in effect:</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> tooltip-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> global-eldoc-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> eldoc-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> show-paren-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> electric-indent-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> mouse-wheel-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> tool-bar-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> menu-bar-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> file-name-shadow-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> global-font-lock-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> font-lock-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> blink-cursor-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> line-number-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> indent-tabs-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> transient-mark-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> auto-composition-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> auto-encryption-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> auto-compression-mode: t</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> Load-path shadows:</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> None found.</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> Features:</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> (shadow sort mail-extr emacsbug message mailcap yank-media puny dired</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg rfc6068</d= iv> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> epg-config gnus-util text-property-search time-date mm-decode mm-bodies</di= v> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs</d= iv> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> comp comp-cstr warnings icons subr-x rx cl-seq cl-macs gv cl-extra</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> help-mode bytecomp byte-compile cl-lib sendmail rfc2047 rfc2045</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> ietf-drums mm-util mail-prsvr mail-utils rmc iso-transl tooltip cconv</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> elisp-mode mwheel term/x-win x-win term/common-win x-dnd tool-bar dnd</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> fontset image regexp-opt fringe tabulated-list replace newcomment</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> text-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow</d= iv> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax</d= iv> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> font-core term/tty-colors frame minibuffer nadvice seq simple cl-generic</d= iv> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> indonesian philippine cham georgian utf-8-lang misc-lang vietnamese</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek</di= v> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> romanian slovak czech european ethiopic indian cyrillic chinese</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> composite emoji-zwj charscript charprop case-table epa-hook</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs</di= v> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> theme-loaddefs faces cus-face macroexp files window text-properties</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> overlay sha1 md5 base64 format env code-pages mule custom widget keymap</di= v> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> hashtable-print-readable backquote threads dbusbind inotify lcms2</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> dynamic-setting system-font-setting font-render-setting cairo</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> move-toolbar gtk x-toolkit xinput2 x multi-tty make-network-process</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> native-compile emacs)</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> Memory information:</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> ((conses 16 77244 5722)</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> (symbols 48 7141 0)</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> (strings 32 19706 2242)</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> (string-bytes 1 597786)</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> (vectors 16 15776)</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> (vector-slots 8 329999 11158)</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> (floats 8 27 46)</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> (intervals 56 262 0)</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> (buffers 984 11))</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> The info page "Predicates on Lists" has a section on `null` which= is</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> confusing. It says:</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> =85as a matter of clarity we use null when object is considered a list and<= /div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> not when it is considered a truth value=85</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> But my understanding is that we also use null when object is considered</di= v> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> a non-boolean value. E.g. if `foo` could be `red` `green` or `nil` then</di= v> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> `foo` is neither a list nor a truth value. The info page made me think I</d= iv> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> should use `not` rather than `null`, but upon further research, it looks</d= iv> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> like `null` is fine for checking for `nil` when `nil` isn't used to</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> represent falsity.</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> I would suggested rewording the info page to read as so:</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> =85as a matter of clarity we use null when object is considered a list or</= div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> other non-boolean value. We use not when object is considered a boolean</di= v> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> value=85</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> It may also be helpful to change the section on `not` in "Constructs f= or</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> Combining Conditions":</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> =85we recommend using the name null if you are testing for an empty list</d= iv> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> or other non-boolean nil.</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> Thanks for your consideration.</div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> <br> </div> <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;= color: rgb(0, 0, 0);"> Tom Dalziel</div> </body> </html> --_000_VI1P194MB2166F15F2124CB6BEDC35E5CEE092VI1P194MB2166EURP_--
Tom DL <tom_dl@HIDDEN>
:bug-gnu-emacs@HIDDEN
.
Full text available.bug-gnu-emacs@HIDDEN
:bug#70392
; Package emacs
.
Full text available.
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.