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CPP makro med variabelt antal parametre?

To: sslug@sslug
Subject: CPP makro med variabelt antal parametre?
From: Kristian Nørgaard <sslug@sslug>
Date: Tue, 18 Oct 2005 15:50:35 +0200
Newsgroups: sslug.programmering
Organization: SSLUG
User-agent: Debian Thunderbird 1.0.2 (X11/20050817)

Kan man lave en cpp makro med variabelt antal parametre?
f.eks. noget der wrapper printf ?

altså kan jeg lave en oneliner i stedet for at skrive

#define WRAPPER1(s,a) printf(s,a)
#define WRAPPER2(s,a,b) printf(s,a,b)
#define WRAPPER3(s,a,b,c) printf(s,a,b,c)

Idé: Kan jeg f.eks. tvinge makroen til at opfatte alt mellem parenteserne som ét argument, noget i retning af:

#define WRAP_PRINTF(s) printf(s)

men hvordan? kommaerne i printf udtryk, får jo makroen til at opfatte s som flere argumenter?

/ Kristian

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