SNESSetUp() and matrix-free options

[Lisandro Dalcin]

On Thu, May 7, 2009 at 5:14 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>>
>> 3) I would like to add a call to set matrix-free programatically...
>> something like SNESSetUseMFFD(snes,...). Any signature suggetions
>> regarding my previous discussions about the many options?
>
>   No need to add this. One can already make the appropriate call to generate
> the
> matrix and set it for the SNES Jacobian. So adding this would be duplicating
> functionality that already exists and hence illegal under PETSc policy.
>

I understand your rationale, though IMHO the sequences of appropriate
calls are not trivial. We could see this as a convenience routine, and
even use it for SNESSetFromOptions()... Anyway, I'll try to implement
it with a _Private suffix just for consumption in SetFromOptions().


-- 
Lisandro Dalcín
---------------
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