So the short answer is that some of the reduction passes are pretty generalizable to C-family languages, and these can be some of the most effective passes.

Some of those passes are:

* Tokenize the input according to C, and randomly chuck away chunks of length 1-(I think) 13. Most languages vaguely similar to C have very similar tokenization rules to C, so these kinds of passes are going to have similar effects, and this will tend to be effective in doing things like omitting needless qualifiers or attributes.

* Balanced parentheses, and chuck away units of balanced parentheses. This includes (), {}, and []--and for almost any language, this can be a useful level of stuff to throw away or reduce.

* Stripping comments and whitespace. Again, many languages use the /* and // styles of comments that C does, so this is pretty effective.

There's actually relatively few passes that are incredibly C/C++-specific, and in my experience, one of the biggest issues with creduce is that it is absolutely terrible at trying to detemplatize the code as a reduction step, which should be a relatively easily automatible step.