On Tuesday 05 August 2003 7:05 pm, Sato, Kristine wrote:
> Hello,
>
> I want to use sip on a class which uses member function templates. Any
> suggestions on the best approach?
>
> Here's a snippet from the class - the SetValue() and GetValue() member
> functions are the problematic ones!
>
> class Record
> {
> public:
> Record(UtTable& , const u32 );
> template<class ITEM_TYPE>
> UtStatus SetValue(const u32, const ITEM_TYPE&);
> template<class ITEM_TYPE>
> UtStatus GetValue(const u32, ITEM_TYPE&);
> };
At the moment you will have to implement ITEM_TYPE as a %MappedType and
provide to handwritten code to convert between a C++ instance and a Python
object that you choose to represent the instance.
Phil
I just tried what you suggested, and it ALMOST works for my class methods...
after running through SIP, I needed to manually add the template<class
ITEM_TYPE> prefix to the ITEM_TYPE mapping functions in order for my
conversion code to compile:
template<class ITEM_TYPE>
extern SIP_MODULE_EXTERN int sipConvertTo_ITEM_TYPE Py_PROTO((PyObject
*,ITEM_TYPE **,int *));
template<class ITEM_TYPE>
extern SIP_MODULE_EXTERN ITEM_TYPE *sipForceConvertTo_ITEM_TYPE
Py_PROTO((PyObject *,int *));
template<class ITEM_TYPE>
extern SIP_MODULE_EXTERN PyObject *sipConvertFrom_ITEM_TYPE
Py_PROTO((ITEM_TYPE *));
and then I also needed to do the same for the ITEM_TYPE-related methods:
template<class ITEM_TYPE>
static PyObject *sipDo_UtTable_Record_SetValue(PyObject *sipThisObj,PyObject
*sipArgs)
template<class ITEM_TYPE>
static PyObject *sipDo_UtTable_Record_GetValue(PyObject *sipThisObj,PyObject
*sipArgs)
in order for them to compile properly.
But the problem is that now I get a compile error on:
static PyMethodDef lazyMethods_UtTable_Record[] = {
{sipName_Engine_GetValue, sipDo_UtTable_Record_GetValue,
METH_VARARGS, NULL},
{sipName_Engine_SetValue, sipDo_UtTable_Record_SetValue,
METH_VARARGS, NULL}
};
because the functions sipDo_UtTable_Record_GetValue() and
sipDo_UtTable_Record_SetValue() are no longer of the correct (PyCFunction)
type.
So it doesn't look like using template member functions is going to work
with Python, as the PyMethodDef struct will not accept a template function.
It looks like I will just have to write %MemberCode for methods for each
specific item type I support. :(
-Kristine
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