[ksh93-integration-discuss] typeset -ix

[Jon Anderson]

Firstly, apologies if my question sounds dumb. I'm no expert in this field.

On s10, I had access to ksh scripts _like_:

function do_add {
     add=add+1
}

function main {
     typeset -ix add=0
     integer i=0

     while [[ $1 -lt 5 ]]
     do
          do_add
          echo "$add"
     done
}

In ksh, the variable add is successfully updated across calls to do_add.
i.e. add is 5 when main function completes.

Running a similar script on/bin/ksh or /bin/ksh93 on Opensolaris 111b
does not work. 

/bin/ksh       : Version M 93t 2008-11-04
/bin/ksh93     : Version M 93t 2008-11-04

Running in these shells tries to assign "add+1" to add instead of performing
an arithmetic expression. Is this expected due to changes between ksh93
and ksh88 (Version M-11/16/88i)

Thanks,

Jon
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