Using and returning output in C macro

Question

I\'m trying to instrument some code to catch and print error messages. Currently I\'m using a macro somethng like this:

#define my_function(x) \\
  switch(functi         


        

Answer 1

A very late reply. But none the less. I agree inline functions are better but MACROs do offer some pretty printing fun you can't get with inline functions. I agree with @qrdl that you can indeed use statement expressions had you restructured your statements a bit. Here is how it would work with a macro -

#define my_function(x, y) ({ \
  int __err = 0; \
  do { \
    __err = function(x, y); \
    switch(__err) { \
      case ERROR: \
        fprintf(stderr, "Error!\n"); \
        break; \
    } \
  } while(0); \
  __err; \
})