On 7/5/21 2:56 PM, Simon wrote:
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?
No, but you need to provide a 'this' pointer for the object you want to work
on. In the first case, this is pointer_M.get(). For a member function of the
current object, it would probably be 'this'.
Best
W.
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Wolfgang Bangerth email: [email protected]
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