Easy preprocessor defines January 4th, 2012Here's a nice little trick I've been using for a while. The trouble with the whole #if-vs-#ifdef debate is that both of them suck for different reasons.
So instead we can create a custom macro to handle some of this stuff:
#define ON + #define OFF - #define USING(x) ((1 x 1) == 2)The advantage here is that a macro is forced to either be defined to ON or OFF; if you don't define it all you'll get a compiler error.
UPDATE: I have replaced the macros with the much better variation as suggested by Robert in the comments below.
#define BIG_ENDIAN ON #if USING(BIG_ENDIAN) // whatever #endif
Written by Richard Mitton,
software engineer and travelling wizard.
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