Dear all,
I am trying to modify my program in a way such that certain quantities are
only updated if the underlying triangulation object changes during runtime
(due to adaptivity). I want to call a specific member function of my Main
Class 'Solid' if this happens. (Solid is the class which calls the typical
functions like make_grid(), system_setup(),...)
The Triangulation<dim,spacedim> class offers a interface to the
boost::signals2 library. I guess that is predestinated for my purpose.
Here is a snippet of my code:
//constructor of 'Solid'
:
dof_handler(triangulation),
/*many_more*/
qf_cell(degree+1),
n_q_points(qf_cell.size())
{
pointer_M = boost::make_shared<AnotherClass<dim>>(/*constructor of
AnotherClass
*/);
boost::signals2::connection tria_signal =
triangulation.signals.post_refinement.connect(
boost::signals2::signal<void()>::slot_type(&
*AnotherClass<dim>::mark_for_update*, pointer_M .get()).track( pointer_M )
);
}
So the constructor of Solid initializes "pointer_M" which points to an
object of "AnotherClass". The variable "tria_signal" in the line below is
the one which causes the call of the member function &
*AnotherClass<dim>::mark_for_update. *
The above code compiles and actually calls *mark_for_update* from
*AnotherClass<dim>* .
But what I'd like to achieve is that the signal triggers a member function
of 'Solid', i.e. something like &*Solid<dim>::call_this_function. *So a
naive approach is to simply replace &*AnotherClass<dim>::mark_for_update*
by &*Solid<dim>::call_this_function* . (Both functions take no parameters
and return void).
Unfortunately this change produces two error messages.
(i) error: pointer to member type ‘void (Solid<2>::)()’ incompatible with
object type ‘AnotherClass<2>’
(ii) error: return-statement with a value, in function returning 'void'
[-fpermissive]
My understanding of the error message is that only member functions of
'AnotherClass' can be connected to the signal.
Is this true?
And can I modify the parameters of the connect function somehow to actually
connect a member function of Solid?
As always, any input is appreciated! :-)
Best
Simon
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