Re: concatenating with cpp

["Chris Eleveld (Sector 7 Group)" <Chris_Eleveld sector7 com>]

You want to use ANSI token pasting:

#define PASTE(a, b)    a##b

#define DIM 4

PASTE(SOME_NAME_, DIM4)

if using K&R compiler:

#define PASTE(a,b)    a/**/b

----- Original Message ----- 
From: <nmargar@mail.demokritos.gr>
To: "Alpha Mailing List" <axp-list@redhat.com>
Sent: Thursday, October 18, 2001 9:23 AM
Subject: concatenating with cpp


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> Dear all,
> 
> I have a problem with the cpp. Well, I have a definition:
> 
> #define DIM 4
> 
> then I need the preprocessor to concatenate "SOME_NAME_" with "DIM", ie
> I want to it to return SOME_NAME_4 which is a function name.
> 
> Thus if I type:
> 
> SOME_VALUE_ some_operation{DIM} ()
> 
> the compiler should call:
> 
> SOME_VALUE_4()
> 
> Can this be done? I have read the info for cpp, and I noticed that
> prescanning of variables is not done for concatenating strings.
> 
> Thanks in advance,
> 
> Nikos
> - -- 
> Dr. Nikolaos A. Margaritis
> Department of Physical Chemistry
> National Research Centre for Physical Sciences "Demokritos"
> Ag. Paraskevi, Athens 15310, Greece.
> Tel: +30(0)1 650 3964
> URL: http://mmml.chem.demokritos.gr/~nmargar
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