Is this a good way to embed debugging message in my program? (Macros)

Question

in the Debug.h file, I have the following:

#ifdef DEBUG_FLAG
    #define DEBUG(msg) std::cerr << #msg << std::endl
#else
    #define DEBUG(msg) for(;         


        

Answer 1

You don't need:

#define DEBUG(msg) for(;;)

at all. If you just have it as:

#define DEBUG(msg)

then the expression will be literally blank and won't require a semicolon at all.

EDIT: And actually, having sole semicolons will not cause crashes or compiler errors.