Comment by WalterBright

Yes, when I implemented ImportC (a C compiler built in to the D compiler), I had to spend a lot of time finding ways to work with all the nutburger nonsense in the various .h files.

https://github.com/dlang/dmd/blob/master/druntime/src/import...

https://github.com/dlang/dmd/blob/master/druntime/src/__impo...