C++ front end

[Robert Dewar]

It is perfectly possible to write a front end in C++ and I see no objections
in doing so. Naturally you would want to ensure that the front end is
compilable with the current version of g++ and stays that way :-)

Note that writing a front end for C++ in C++ would also be possible, but
would acquire some of the problems that GNAT has (since then you would have
to find a working binary to bootstrap, just as you have to find a working
GNAT binary to compile GNAT).