Re: Evaluate complex conditions

[D.BALE@xxxxxxxxxxxxx]

Assuming that the user is entering the "rest" on an entry line, how does one
go about doing that in REXX?  How about a simple shell where a CL program is
called, prompts the user, the user enters the:

      a = b and (c = d or c = e or c = f)

How do you get that input into "rest"?  And, assuming this is to be used for
record selection, how do you do that in REXX?  What are the performance
implications?  Would the "stack machine" discussed previously be faster?

All very interesting stuff.

Dan Bale
IT - AS/400
Handleman Company
248-362-4400  Ext. 4952

-------------------------- Original Message --------------------------
Consider using REXX for this.

     Signal on Syntax        /* Catch not valid expressions */
     Interpret 'I = ' rest   /* Evaluate the expression */
     Return i

Regards,

Jim Langston

Date: Mon, 23 Oct 2000 09:18:08 -0500
From: Terry Grider <tgrider@arkansas.net>
Subject: Evaluate complex conditions

Has anyone ever written or seen an example of program code designed to
evaluate complex conditions?  For example, if you wanted to evaluate a =
b and (c = d or c = e or c = f).  I'm looking for something that can do
multiple levels of parenthesis and all "and/or" combinations.

- --
Terry Grider
tgrider@arkansas.net
+---
| This is the Midrange System Mailing List!
| To submit a new message, send your mail to MIDRANGE-L@midrange.com.
| To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com.
| To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---