Delphi makes things worse because the code it generates is incredibly ugly. The code listings use the C++ std and it looks straightforward so presumably it is just good old C++.
It could equally be C++Builder. Back in those dates, the C++ compiler used a similar backend to Delphi - it was derived from Delphi's originally, since the two products interop and you can use both languages in one app. Today's C++Builder uses LLVM.
