[C++-sig] Newbie type conversion question
Mark Russell
mrussell8081 at pacbell.net
Fri Nov 15 23:51:55 CET 2002
Dave,
Yes this helps I just want to check my understanding of converters and what
I think I need to do for this case. From the thread you sent me:
-snip--
You need to register an lvalue converter for FILE. Something like:
struct pyfile_to_FILE
{
static File& execute(PyObject& o) { return *PyFile_AsFile(&o); }
}
// In your module init function
lvalue_from_pytype<pyfile_to_FILE,&PyFile_Type>();
--snip--
So I need to write a converter that makes the cast from int to HWND based on
the model above. Now I don't want every int converted so I think I need to
write an HWND object wrapper in python with the int I want converted as an
attribute then my converter will convert these as desired. Is this correct?
Thanks for the quick replies boost python is a blast to work with.
--Mark
Mark Russell <mrussell8081 at pacbell.net> writes:
> I am wrapping part of DirectX and have run into an number of variations of
> the problem described below.
>
> In struct IntHwnd; HWND is a pointer. What I pass to the wrapper from
> python is an int representation of the pointer so I need to cast the int
> from python to a pointer in C++. I need to do the reverse when getting
the
> attribute. How do I accomplish this?
>
> struct IntHwnd
> {
> HWND w;
> };
>
This seems like a similar problem:
http://aspn.activestate.com/ASPN/Mail/Message/1411366
Does that help at all?
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