Path: utzoo!attcan!uunet!mcsun!ukc!edcastle!ecsv38
From: ecsv38@castle.ed.ac.uk (S Manoharan)
Newsgroups: comp.lang.c++
Subject: Re: #defines....
Message-ID: <5005@castle.ed.ac.uk>
Date: 3 Jul 90 16:09:37 GMT
References: <37786@genrad.UUCP>
Reply-To: ecsv38@castle.ed.ac.uk (S Manoharan)
Organization: Dept of Computer Science, University of Edinburgh
Lines: 13

In article <37786@genrad.UUCP> slp@genrad.genrad.COM (Steven L. Peters) writes:
>have to.  I'm wondering if you ever have to.  I can't think of a
>single time where you would be forced to use a #define over const or
>inline...

1. To avoid multiple inclusion of header files.

2. Macros local to a function. As in:
#define _C(i,j)         ( *(C + nelements * i + j) )
where C is <some> ptr, and _C(i, j) defines element [i, j] of an array.
Note that an inline can't be local to a function.

Mano.