Official C Challenge ①

Task:  Come up with an extension to the C programming language.  Provide a clear description of the extension, and a code sample that clearly shows what the extension is intended to do.

Prize:  (Winning criteria are not specified.)  The winner will have his extension featured in the C11 language standard.

My entry:  ... Sorry, I think C is perfect in every way already.

>>41
Even C++ shuffled off that nonsense pretty quick.
Not really.  Look at templates.  They're just a dumb compile-time expansion that could be fully handled with an inline script like this.  Then, if there's something about the way templates work that you don't like, you don't need to wait 40 years for C++4x to fix it.  That's what I meant when I originally said
You could implement most of C++ manually in this way, since nearly everything C++ adds to C is just compile-time crap.