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Date: Thu, 15 Sep 2011 13:12:31 +0100
From: Peter Stephenson <Peter.Stephenson@csr.com>
To: zsh workers <zsh-workers@zsh.org>
Subject: Re: \" in $(( )) vs $[ ]
Message-ID: <20110915131231.57ee6e37@pwslap01u.europe.root.pri>
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On Thu, 15 Sep 2011 12:17:44 +0200
Mikael Magnusson <mikachu@gmail.com> wrote:
> % echo $(( ##\" ))
> <cmdsubst:~>%

At this point we haven't resolved between $((...)...) and $((...)), but
I don't think double quote needs to be handled differently in the two
cases.

Index: Src/lex.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/lex.c,v
retrieving revision 1.67
diff -p -u -r1.67 lex.c
--- Src/lex.c	19 Jun 2011 16:26:11 -0000	1.67
+++ Src/lex.c	15 Sep 2011 12:09:27 -0000
@@ -1482,7 +1482,8 @@ dquote_parse(char endchar, int sub)
 		    (endchar == ']' && (c == '[' || c == ']' ||
 					c == '(' || c == ')' ||
 					c == '{' || c == '}' ||
-					(c == '"' && sub))))
+					(c == '"' && sub))) ||
+		    (endchar == ')' && c == '"'))
 		    add(Bnull);
 		else {
 		    /* lexstop is implicitly handled here */
Index: Test/D08cmdsubst.ztst
===================================================================
RCS file: /cvsroot/zsh/zsh/Test/D08cmdsubst.ztst,v
retrieving revision 1.4
diff -p -u -r1.4 D08cmdsubst.ztst
--- Test/D08cmdsubst.ztst	11 Jul 2009 16:43:01 -0000	1.4
+++ Test/D08cmdsubst.ztst	15 Sep 2011 12:09:28 -0000
@@ -98,3 +98,11 @@
  echo `echo $?`
 0:Non-empty command substitution inherits status
 >1
+
+ echo $(( ##\" ))
+ echo $(echo \")
+ echo $((echo \"); echo OK)
+0:Handling of backslash double quote in parenthesised substitutions
+>34
+>"
+>" OK

-- 
Peter Stephenson <pws@csr.com>            Software Engineer
Tel: +44 (0)1223 692070                   Cambridge Silicon Radio Limited
Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, UK


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