Comment by WalterBright

My original C compiler was implemented in C and then bootstrapped. Zortech C++ was implemented in Zortech C, and then bootstrapped.

D was implemented in "C with Classes" and then translated to D and bootstrapped. There isn't a line of C code in it.

Over time, we gradually replace the C-isms and C++isms and anachronisms in it to native D-isms.