Hi Alan,
> -----Original Message-----
> From: Alan W. Irwin [mailto:ir...@beluga.phys.uvic.ca]
>
> I was pretty proud of that implementation, but there is a "slight" problem
> with it
> which is it does not work! :-(
>
Well, the idea was a good one, pity about the failure.
> So the question is whether this peculiar behaviour is due to a gfortran bug
> or due to
> an issue with the Fortran standard for disambiguation, and I hope you will
> continue
> to pursue that question with your Fortran contacts.
>
> Meanwhile, I will throw away the above "good" idea and continue with the
> (double-
> precision only) status quo for plstransform (and plslabelfunc).
>
I know of one way to solve this: the procedure arguments should be functions
that return data of a distinguishable type. For instance: the transform
callback should return the new coordinates as an array of two reals (either
single or double precision). That is much less natural for the label function.
We could require that that too returns some single/double precision value, for
instance the argument that came in, but it feels like a kludge.
The whole thing is evolving - in Fortran 2015 more is possible (currently there
is a thread on the Intel Forum where this is discussed), but that is no
solution for the moment.
In view of all this, I think we should either use the "only double precision"
solution or go for the function solution, however kludgy that feels.
Regards,
Arjen
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