Re: Concatenated if and preprocessor

On 13/03/2025 15:44, pozz wrote:

Consider this code:
 if (cond1) {
...
} else if (cond2) {
...
} else if (cond3) {
...
}
 I want to activate every single if with a macro preprocessor. All the combinations are possible: only the first, only the second, only the third, the first and second... and so on.
 What's the best method to have a clean code that is always compiled without errors?

Comment out the macro of the conditions that are not needed:
   #define COND1
   #define COND2
   #define COND3
       if (0) {
       }
   #ifdef COND1
       else if (cond1) {
       }
   #endif
   #ifdef COND2
       else if (cond2) {
       }
   #endif
   #ifdef COND3
       else if (cond3) {
       }
   #endif
All 8 combinations (for 3 branches) should work including all disabled.