Simple ways to disable parts of code

Question

This isn\'t a typical question to solve a specific problem, it\'s rather a brain exercise, but I wonder if anyone has a solution.

In development we often need to disable

Answer 1

Synchronously switching on/off chunks of code scattered across the program is sometimes a need too.

Inspired by this earlier post by Graham I cooked up something like this:

void doNothing(){}
#define DO_IF(flag, code) flag ? code : doNothing();

This can be for instance used as follows:

DO_IF(collectStats, recordStats());
DO_IF(collectStats, store(pullStat()));

An that is even better:

#define DO_IF(flag,code) if( flag ) { code; }