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

I think you will need to use extra parentheses to make your expressions look like a single argument which won't get broken up by the preprocessor, i.e. do it more like this:

#define MY_MACRO( (expr) ) DOSOMETHING( (expr) ); DOANOTHERTHING( (expr) ); // etc...

int my_function() {
    MY_MACRO( 
        (int k = AFunction();
        k++;
        AnotherFunction( k );)
    ); 
}

although I haven't actually tried it.