Macro function with several lines for the parameter?

Question

In C++, I need to defined a macro. That macro would take as parameter a \"block\" of code.

Can we safely use several lines of code as parameter of a macro fu

Answer 1

the way to make it work (at least for gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu9)), is to use braces { } enclosing your actuals for the macro.

A useful example:

#ifdef DEBUG
#define MYDEBUG(X) (X)
#else
#define MYDEBUG(X)
#endif

MYDEBUG({
  if (shit_happens) {
     cerr << "help!" << endl;
     ....
  }
});