Dear list,
how can I have a static member function that acts like a constructor
in a Wrapper, i.e. I have a class that I want to extend from python?
I have a wrapper class around a class (PfemSpace) that has this static
member functions:
static RCP<PfemSpaceWrapperT> create( ... )
{
RCP<PfemSpaceWrapperT> ret(new PfemSpaceWrapperT( ... ));
ret->setThisRCP(ret);
return ret;
}
This method is exported via
.def("__init__", make_constructor( &ClassWrapperT::create ) )
This works without errors, but when I use this from python via
class PfemSpaceStaticCond(PfemSpace):
def __init__(self, ...):
super(PfemSpaceStaticCond, self).__init__(...)
def visit_createFemData(self):
print '## [PfemSpaceStaticCond_init] visit_createFemData'
Here I call the constructor that I exported via make_constructor in
__init__(). Unfortunately the member function visit_createFemData that
I override in python never gets called. When I use a "real"
constructor instead of the one exported via make_constructor() then
the function visit_createFemData gets called.
I assume the error is somewhere that with a real constructor
boost::python can call an inplace constructor, while with my
make_constructor it can't. Is there some way to have the needed
functionality with make_constructor?
Note: today I came to the conclusion that I a read constructor instead
of a static member function is not an option for me due to the issues
I wrote in my previous mail "storing weak_ptr to this in classes
extended from python". That previous mail is actually from yesterday,
but it originally got rejected because I send it from a wrong email
address, so I'm sorry that you are receiving two mails from me today.
For a moment I was very happy that this "static constructor-like
function in the Wrapper class" would solve all my problems, but I am
still missing something.
Thanks for your help,
Holger
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