Question

I am currently attempting to define a function based on a compiler flag. If the TRACE flag is set, then I want to define a macro to pass information to a trace component.

#define TRACERPTR(Reporter * pReporter, traceComponent eComponent, traceLevel eLevel, string sFormat, formatArgs...) \
if (pReporter != NULL) { pReporter->trace(eComponent, eLevel, sFormat, ##formatArgs); }

Reporter is a class, defined in the same .h file, above this macro. I need to pass a pointer of a reporter object, which is then used to call the trace function.

However, I get a compiler error:

error: “*” may not appear in macro
parameter list

I was curious as to what would occur if I just removed the “*” — which results in the error “macro parameters must be comma-separated”.

Any idea as to what I am doing wrong here?

Answer 1

To my knowledge, in C, at least, macro parameters aren’t typed. It’s all symbol substitution. Just use pReporter rather than Reporter * pReporter or Reporter pReporter.

(The same applies to the other parameters for your macro, I suppose.)