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From: bbadger@x102c.harris-atd.com (Badger BA 64810)
Newsgroups: comp.unix.wizards
Subject: csh variable syntax '${x1[2]}' is broken.
Keywords: unix, csh, variable, substitution, bug
Message-ID: <1893@trantor.harris-atd.com>
Date: 5 Apr 89 15:29:37 GMT
Sender: news@trantor.harris-atd.com
Reply-To: bbadger@x102c.harris-atd.com (Badger BA 64810)
Organization: Harris GISD, Melbourne, FL
Lines: 74

Variable expansion in csh isn't done properly.
The problem is shown by this example:

% set verbose
set verbose
set verbose 
% set x1=(a b c)
set x1= ( a b c ) 
% echo ${x1[2]}		
echo 1${x[2]} 
Variable syntax.
% 

Here's a more complete transcript, showing that a variable name with no 
digits in it works correctly:

% set echo
% set verbose
set verbose
% set xx=(a b c)
set xx= ( a b c ) 
set xx= ( a b c )
% set x1=(d e f)
set x1= ( d e f ) 
set x1= ( d e f )
% alias x 'echo ${x\!:1[2]}'
alias x 'echo ${x!:1[2]}' 
alias x echo ${x!:1[2]}
% alias x_ 'echo $x\!:1[2]'
alias x_ 'echo $x!:1[2]' 
alias x_ echo $x!:1[2]
% echo ${xx[2]}
echo ${xx[2]} 
echo b
b
% x x
x x 
echo b
b
% echo $xx[2]
echo $xx[2] 
echo b
b
% x_ x
x_ x 
echo b
b
% echo $x1[2]
echo $x1[2] 
echo e
e
% x_ 1
x_ 1 
echo e
e
% echo ${x1[2]}		
echo 1${x[2]} 
Variable syntax.
% !!
echo 1${x[2]} 
x: Undefined variable.
% x 1
x 1 
Variable syntax.
% !!
x 1 
Variable syntax.
% 

The work-around seems to be to not use {}'s.
Bernard A. Badger Jr.	407/984-6385          |``Use the Source, Luke!''
Secure Computer Products                      |``Get a LIFE!''  -- J.H. Conway
Harris GISD, Melbourne, FL  32902             |Buddy, can you paradigm?
Internet: bbadger%x102c@trantor.harris-atd.com|'s/./&&/g' Tom sed expansively.