Indenting #defines

Question

I know that #defines, etc. are normally never indented. Why?

I\'m working in some code at the moment which has a horrible mixture of #define

Answer 1

I'm working in some code at the moment which has a horrible mixture of #defines, #ifdefs, #elses, #endifs, #etc. All these often mixed in with normal C code. The non-indenting of the #defines makes them hard to read. And the mixture of indented code with non-indented #defines is a nightmare.

A common solution is to comment the directives, so that you easily know what they refer to:

#ifdef FOO
/* a lot of code */
#endif /* FOO */

#ifndef FOO
/* a lot of code */
#endif /* not FOO */