Thanks for the response
That trick can help me out in the python level since python is has a duck
typing attribute.
do you familiar with any a procedure for the C++ ?. what I mean is this : I
would like to have some generic pointer that can either point to
BarWithPolicy<FooFilePolicy
> nor to BarWithPolicy<FooIoPolicy > ?
thanks
-Dotan
On Sun, Mar 17, 2013 at 9:36 AM, Holger Brandsmeier <brandsme...@gmx.de>wrote:
> Dotan,
>
> in
> >>> barPolicy = GetBarWithPolic(Io)
> >>> barPolicy = GetBarWithPolic(File)
> what type of object would you imaginge `Io` and `File` to be?
>
> You already exported the functions as `GetBarWithPolicIo` and
> `GetBarWithPolicFile` and then you could implement in python
> `GetBarWithPolic(str)` and there use something like `return
> globals()["GetBarWithPolic%s" % (str,)]()` where you would now do
> barPolicy = GetBarWithPolic("Io")
> barPolicy = GetBarWithPolic("File")
>
> -Holger
>
> On Sun, Mar 17, 2013 at 6:49 AM, dbarak <dba...@gmail.com> wrote:
> > Assume I have this Interface:
> > class FooInterface
> > {
> > public:
> > ...
> >
> > };
> >
> > class FooFilePolicy : public FooInterface
> > {
> > ...
> > };
> >
> > class FooIoPolicy : public FooInterface
> > {
> > ...
> > };
> >
> > And I have this template using the upper interface policy:
> >
> > template< typename FooPolicy >
> > class BarWithPolicy
> > {
> > ...
> > FooPolicy* policy;
> > ...
> > };
> >
> > How can I expose BarWithPolicy to python that can be generically
> instantiate
> > with both FooIoPolicy and FooFilePolicy ?
> >
> >
> > I don't want to do this :
> >
> > BarWithPolicy<FooFilePolicy >& GetBarWithPolicyFile()
> > {
> > return new BarWithPolicy<FooFilePolicy >;
> > }
> >
> > BarWithPolicy<FooIoPolicy>& GetBarWithPolicyIo()
> > {
> > return new BarWithPolicy<FooIoPolicy >;
> > }
> >
> > BOOST_PYTHON_MODULE(PyBar)
> > {
> > def("GetBarWithPolicyFile",
> > &GetBarWithPolicyFile,
> > return_value_policy<reference_existing_object>(),
> > ""
> > );
> > def("GetBarWithPolicyIo",
> > &GetBarWithPolicyIo,
> > return_value_policy<reference_existing_object>(),
> > ""
> > );
> > }
> >
> > I would like to have some thing like this in python:
> >
> >>>> barPolicy = GetBarWithPolic(Io)
> > Or
> >>>> barPolicy = GetBarWithPolic(File)
> >
> > Thanks
> > -Dotan
> >
> >
> >
> >
> >
> > --
> > View this message in context:
> http://boost.2283326.n4.nabble.com/Exposing-c-class-template-to-Python-known-template-instances-tp4644238.html
> > Sent from the Python - c++-sig mailing list archive at Nabble.com.
> > _______________________________________________
> > Cplusplus-sig mailing list
> > Cplusplus-sig@python.org
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--
Dotan Barak
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