I think a more accurate way to describe it is that it's a C compiler written in C and then automatically transpiled to VimScript.
No human hand-authored this giant pile of VimScript: https://raw.githubusercontent.com/rhysd/8cc.vim/master/autol...
No human hand-authored this giant pile of VimScript: https://raw.githubusercontent.com/rhysd/8cc.vim/master/autol...