I guess you're talking about semantic highlighting and C::B could not do it at the moment.
What Morten suggested is that if you want this feature, so much you can implement
it yourself and then provide a patch, so we can integrate it.
Come to think about it, semantic code completion would be nice too.
If, for example, one writes:
...and then hits ctrl+space, it would be cool if C::B provides us a list of basic types, structs, classes, etc.
But there still is an ongoing effort in refactoring the code completion, so maybe a bit of patience, even when submitting patches, is advised.