ufl team mailing list archive

[Martin Sandve Alnæs <martinal@xxxxxxxxx>]

On 27 April 2011 12:38, Garth N. Wells <gnw20@xxxxxxxxx> wrote:

>
>
> On 27/04/11 11:08, Kristian Ølgaard wrote:
> > On 27 April 2011 11:52, Anders Logg <logg@xxxxxxxxx> wrote:
> >> On Wed, Apr 27, 2011 at 10:40:50AM +0100, Garth N. Wells wrote:
> >>> We need a quick discussion round to resolve this issue - DOLFIN is now
> >>> broken. I guess we need the form compiler to decide on the cell and
> >>> element type, and then have UFL return a new form.
> >>
> >> Yes, Martin mentioned at some point that it would be easy to add such
> >> a function to UFL (that takes a form and replacement elements and
> >> returns a new form).
> >>
> >> Martin, could you add such a function?
>

I started some time before easter, but as Garth says...

> I think ufl.algorithm.transformations.replace would work if
> > FiniteElementBase derived from 'Terminal'.
> > Currently, it derives from 'object', what is the reason for that?
> > Anyway, it should be simple enough to add something equivalent for
> elements.
> >
>
> I was thinking that we only need to replace Coefficients, e.g. if a
> Coefficient is defined using an 'incomplete element', FFC can create an
> element, a Coefficient and the perform the replacement. Looks like UFL
> can do this already.
>
> The problem from the DOLFIN side is that the new UFL Coefficient will be
> different from the DOLFIN/UFL Coefficient, and would be a
> ufl.Coefficient and not a dolfin.Coefficient.


... this may be a problem. Since I don't really know the motivation for this
feature request, I can't solve this problem for you.

Martin



>
> Garth
>
> > Kristian
> >
> >> --
> >> Anders
> >>
> >>
> >>> Garth
> >>>
> >>> On 26/04/11 07:32, noreply@xxxxxxxxxxxxx wrote:
> >>>> ------------------------------------------------------------
> >>>> revno: 1014
> >>>> committer: Martin Alnæs <martinal@xxxxxxxxx>
> >>>> branch nick: ufl
> >>>> timestamp: Fri 2011-04-15 21:44:37 +0200
> >>>> message:
> >>>>   Add warnings to set_foo functions in finiteelement.py,
> >>>>   and remove repr modifications after construction time.
> >>>>
> >>>>   If this will break your code, it likely wasn't working
> >>>>   correctly anyway and you need to rewrite it before you
> >>>>   can update to this UFL version.
> >>>>
> >>>>   The set_foo functions will be removed completely before UFL 1.0.
> >>>>
> >>>>   Happy easter holiday :)
> >>>> modified:
> >>>>   ufl/finiteelement.py
> >>>>
> >>>>
> >>>
> >>>
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> >>
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>
>
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