* bug#8632: 23.2; shell-script[bash] doesn't handle bitshift $(( 1 << 16 ))
@ 2011-05-06 22:38 Ben Wong
2011-05-13 19:12 ` Stefan Monnier
0 siblings, 1 reply; 3+ messages in thread
From: Ben Wong @ 2011-05-06 22:38 UTC (permalink / raw)
To: 8632
In shell-script mode (bash minor mode) Emacs 23.2 incorrectly parses the
following line as a HERE DOCUMENT.
echo $(( 1 << 16 ))
It is confused because sh-font-lock-open-heredoc (in sh-script.el)
does not know about bash's ARITHMETIC EXPANSION. There should be a
function, similar to sh-in-comment-or-string, which parses the
script looking for arithmetic expansion.
As a temporary workaround for users, I believe it is legal to put double
quotes around any arithmetic expansion to force emacs to view it as a
string.
In GNU Emacs 23.2.1 (i486-pc-linux-gnu, GTK+ Version 2.20.0)
of 2010-12-11 on raven, modified by Debian
configured using `configure '--build' 'i486-linux-gnu' '--build' 'i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var/lib' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs23:/etc/emacs:/usr/local/share/emacs/23.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.2/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/23.2/leim' '--with-x=yes' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars' 'build_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -g -O2' 'LDFLAGS=-g' 'CPPFLAGS=''
Important settings:
value of $LC_ALL: nil
value of $LC_COLLATE: nil
value of $LC_CTYPE: nil
value of $LC_MESSAGES: nil
value of $LC_MONETARY: nil
value of $LC_NUMERIC: nil
value of $LC_TIME: nil
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: nil
locale-coding-system: utf-8-unix
default enable-multibyte-characters: t
Major mode: Shell-script
Minor modes in effect:
shell-dirtrack-mode: t
gpm-mouse-mode: t
which-function-mode: t
show-paren-mode: t
display-time-mode: t
recentf-mode: t
iswitchb-mode: t
tooltip-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
auto-encryption-mode: t
auto-compression-mode: t
size-indication-mode: t
line-number-mode: t
^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#8632: 23.2; shell-script[bash] doesn't handle bitshift $(( 1 << 16 ))
2011-05-06 22:38 bug#8632: 23.2; shell-script[bash] doesn't handle bitshift $(( 1 << 16 )) Ben Wong
@ 2011-05-13 19:12 ` Stefan Monnier
2012-04-17 10:28 ` Vincent Lefevre
0 siblings, 1 reply; 3+ messages in thread
From: Stefan Monnier @ 2011-05-13 19:12 UTC (permalink / raw)
To: Ben Wong; +Cc: 8632
> In shell-script mode (bash minor mode) Emacs 23.2 incorrectly parses the
> following line as a HERE DOCUMENT.
> echo $(( 1 << 16 ))
> It is confused because sh-font-lock-open-heredoc (in sh-script.el)
> does not know about bash's ARITHMETIC EXPANSION.
Indeed, thanks for spotting this.
> There should be a function, similar to sh-in-comment-or-string, which
> parses the script looking for arithmetic expansion.
I guess the way to do it would be to try to handle $(( as
a string-opener in sh-syntax-propertize-function and then write
code to jump to the matching )) to mark it as the string-closer.
Patch welcome,
Stefan
^ permalink raw reply [flat|nested] 3+ messages in thread
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2011-05-06 22:38 bug#8632: 23.2; shell-script[bash] doesn't handle bitshift $(( 1 << 16 )) Ben Wong
2011-05-13 19:12 ` Stefan Monnier
2012-04-17 10:28 ` Vincent Lefevre
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