Thread: another mystifying C syntax issue - DEBUG macro - #define

Simply unbelievable.

Code:

#define DEBUG
#ifdef DEBUG
#define dg(x) _tprintf(x)
#else
#define dg(x) do {} while (0)
#endif

dg ( (_T("parsed node %s %d"), wordwrk, z) );

The above fails because the LAST _tprintf parameter is an INT. Swap the two and the syntax is then OK:

dg ( (_T("parsed node %d %s"), z, wordwrk) );

I'm all ears as to why this simply isn't a replacement of dg with _tprintf.



Fortunately, I found another better use of macros for debugging:

Code:

#define NODEBUG2
#ifdef DEBUG2
#define D if(1)
#else
#define D if(0)
#endif

D _tprintf(_T(parsed node %s %d"), wordwrk, z);