Just to clarify a bit, C++ and Objective were not written in the C pre-processor, but rather implemented as their own pre-processor program, analogous to Qt's moc.
Yes like Cfront [1]. I used that back in the day, the pain of it caused me to rewrite all my C++ in C though :p Call me a coward!
> Just to clarify a bit, C++ and Objective were not written in the C pre-processor, but rather implemented as their own pre-processor program, analogous to Qt's moc.
I bet these pre-processor programs were themselves written in C.