[erlang-questions] question: macro definition
Tue Jan 15 15:17:27 CET 2008
Hi Richard, Mats, Hynek;
Thanks for your fast response.
On Jan 15, 2008 6:05 PM, Hynek Vychodil <vychodil.hynek@REDACTED> wrote:
> Macros don't work like erlang functions, they don't have arity so
> LOG/1 and LOG/2 are same macro LOG.
> On 1/15/08, Ahmed Ali <ahmed.nawras@REDACTED> wrote:
> > Hi,
> > I have a question about macro definitions in Erlang.
> > When I write the following in my .hrl file:
> > <code>
> > [line 10] -define(LOG(X), io:format("~w~n",[X])).
> > [line 11] -define(LOG(X,D), io:format("~w~n",[X,D])).
> > </code>
> > I get the following compile error:
> > ./../include/file.hrl:11: redefining macro ''LOG''
> > Can someone explain to me what "redefining" means here? Does that mean if I
> > cannot define a macro with the same name even though they have different
> > arity?
> > Best regards,
> > Ahmed Al-Issaei
> > _______________________________________________
> > erlang-questions mailing list
> > erlang-questions@REDACTED
> > http://www.erlang.org/mailman/listinfo/erlang-questions
> --Hynek (Pichi) Vychodil
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