Re: Block Comments Or Rest-Of-Line Comments?

James Kuyper <jameskuyper@alumni.caltech.edu> writes:

On 3/21/24 15:23, Keith Thompson wrote:

Richard Harnden <richard.nospam@gmail.invalid> writes:
[...]

And sometimes, when it's not a really a comment, but rather a block of
code I don't want right now:
>
#ifdef 0
...
#endif

 
I think you mean "#if 0".

>
I'm sure he did. However, I'd like to mention that I have occasionally
used #ifdef with a macro name that I haven't #defined, and have no plans
to #define, but which describes the reason why I'm commenting this
section out. This is purely to document my reason, but should I ever
change my mind, I can simply #define the corresponding macro.

Just to be clear, the problem with "#ifdef 0" is that 0 is not an
identifier.

main.c:1:8: error: macro names must be identifiers
    1 | #ifdef 0
      |        ^

--
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Working, but not speaking, for Medtronic
void Void(void) { Void(); } /* The recursive call of the void */