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bug#8632: 23.2; shell-script[bash] doesn't handle bitshift $(( 1 << 16 )
From: |
Stefan Monnier |
Subject: |
bug#8632: 23.2; shell-script[bash] doesn't handle bitshift $(( 1 << 16 )) |
Date: |
Fri, 13 May 2011 16:12:54 -0300 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) |
> 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