Another interesting way to achieve object-orientedness in C can be found in libdispatch [1], the user space implementation of Apple's Grand Central Dispatch API

Another interesting way to achieve object-orientedness in C can be found in libdispatch [1], the user space implementation of Apple's Grand Central Dispatch API. It makes use of the transparent_union GCC attribute [2], among other things, and is pretty heavy on macro usage. Cool stuff. [1] http://libdispatch.macosforge.org/ http://libdispatch.macosforge.org/ [2] http://gcc.gnu.org/onlinedocs/gcc/Type-Attributes.html http://gcc.gnu.org/onlinedocs/gcc/Type-Attributes.html