RECURSIVE vs PURE and ELEMENTAL

[Walter Spector]

Steve Kargl wrote:
> ...
> I guess I just don't understand what is failing for you.

A couple of things:

1a.) Try making both 'factorial' and 'factorial_inner' ELEMENTAL.
The first should be ok.  The second should give an error at the
point where it calls itself.  (Or at least a warning when -pedantic
is used.)

1b.) Try then making 'factorial_inner' PURE (but not RECURSIVE).
This should also give a message at the point where it calls itself.

2.) I tried upgrading my gfortran to the latest cygwin binary.
Unfortunately, it is now broken ("nothing happens" when I issue
the gfortran command.  The driver just returns a exit code of 1.)

I need to do some errands, so will try to look at it some more
later today.

W.