ufl team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Sat, Mar 12, 2011 at 11:28:15AM +0100, Martin Sandve Alnæs wrote:
> Changing repr is incorrect, and the bugs you're finding will never end.
>
> It is a fundamental design choice in UFL to make everything
> immutable, and the repr strings can never change. This is a
> critical property for lots of things to work, and it is assumed
> all over the place. It cannot ever be changed.
>
> Instead of modifying an UFL object, always create a
> new one with the changes you want. This is how every
> algorithm in UFL works, and this is how every future
> algorithm working on UFL objects must work.

ok, good point.

The reason for these changes are the two functions set_cell and
set_degree in the finite element classes, which are used to set the
cell and degree of an element when they are unspecified ("?"). They
have been around for a long time.

--
Anders