Re: variable name and its' value are the same characters causes recursion error

[Chet Ramey]

On 3/7/11 11:48 PM, Peggy Russell wrote:

> It would be helpful if indirection was explained in the documentation for
> [[ expression ]], [ expression ], and declare.

The existing documentation seems pretty clear:

Shell variables  are  allowed as operands; parameter expansion is per-
formed before the expression is evaluated.  Within an expression, shell
variables  may  also  be referenced by name without using the parameter
expansion syntax.  A shell variable that is null or unset evaluates  to
0 when referenced by name without using the parameter expansion syntax.
The value of a variable is evaluated as an arithmetic  expression  when
it  is  referenced, or when a variable which has been given the integer
attribute using declare -i is assigned a value.  A null value evaluates
to  0.   A shell variable need not have its integer attribute turned on
to be used in an expression.


-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/