asked on 7/23/2008

How to insert a compile time warning to a macro

I have an old macro that I wish to delete. I want all the other programmer not to use it any more. So I want to insert a warning that will be displayed at compile time, when this macro is used.
How can I do it?

C C++

Last Comment

evilrix

7/23/2008

ASKER CERTIFIED SOLUTION

evilrix

7/23/2008

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evilrix

7/23/2008

If you have access to Boost you can take advantage of the BOOST_STATIC_WARNING macro.

#include <boost/static_warning.hpp>
 
#define DEPRECATED_MACRO \
	BOOST_STATIC_WARNING(false); \
	int i=0; // DO something deprecated
 
int main()
{
	DEPRECATED_MACRO // Comment this out and the warning should disappear.
}

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Infinity08

7/23/2008

Something like this :

#define MACRO _Pragma("\"Warning: deprecated macro 'MACRO' called\"") something

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evilrix

7/23/2008

>> Something like this
_Pragma won't work on all compilers.

Infinity08

7/23/2008

>> >> Something like this
>> _Pragma won't work on all compilers.

It should on C99 compliant compilers.

I posted it, because if osnat's compiler supports it (and most recent compilers do), it's imo cleaner and simpler.

osnat

7/23/2008

ASKER

This is for evilrix:
I used your solution, but when I use the macro, I get the following ERROR in compile time:

error: expected a declaration
USE_SLOTS (SegmentPencilImp);

Where USE_SLOTS is the deprecated macro

Infinity08

7/23/2008

You don't have to accept an answer yet if you still have problems/doubts.

Also take a look at the other suggestions posted ... Maybe one of those suits you better.

evilrix

7/23/2008

>> I used your solution, but when I use the macro, I get the following ERROR in compile time:
Can you post the code please?

evilrix

7/23/2008

^^^It's probably just a simple syntax error we can sort out quite easily :)