RE: [MI400] A Blast from the Past

[Jim Langston <jlangston@xxxxxxxxxxx>]

Just a comment on the 2nd type.

If MI follows C, then they are not quite the same.

#Define NAMED-CONSTANT = 'ANYTHING'
When you use that in your program, the compiler will replace NAMED-CONSTANT 
with 'ANYTHING'.

DD  CON  NAMED-CONSTANT  CHAR(10)  INIT('ANYTHING');
When you use that in your program, the compiler will the address of the 
constant.

The main difference being that the #Define uses the object stack.  The CON uses 
the program stack.

That's how it would work in C, anyway.  It may actually work different in MI.

Regards,

Jim Langston

-----Original Message-----
From: Richard Hart [mailto:rhart@ATCDG.COM]

About two kinds of macros:

(1)  complicated ones
(2)  simple ones (as:  %Define CARRIAGE-RETURN = X'0D'  /* In Ascii */

The second kind is really just a named constant, right?  I guess we have the

                DD  CON  NAMED-CONSTANT  CHAR(10)  INIT('ANYTHING');

Definition type for that.