On Tue, 2010-01-26 at 13:36 +0100, martin manduch wrote:
>
> I want to make XVec responsible for memory, which is addressed through
> pointers, but I don't know how.
>
That would be difficult, especially because you can't really subclass
std::vector in a safe way.
>
> I need to wrap vector of pointers, because it's parameter in one function...
>
If it's only used in one function, I'd recommend writing a custom
wrapper for that function that does a manual conversion from a Python
list. Something like this:
void py_accept_vector(boost::python::list const & sequence) {
int size = boost::python::len(sequence);
std::vector<X*> vector(size);
for (int n = 0; n < size; ++n) {
boost::python::extract<X*> converter(sequence[n]);
if (!converter) {
PyErr_SetString(
PyExc_TypeError,
"Expected sequence of 'X' objects."
);
boost::python::throw_error_already_set();
}
vector[n] = converter();
}
accept_vector(vector); // The passed vector's items are managed
// by Python, and cannot be relied upon
// to be valid after the function exits.
}
You can then wrap "py_accept_vector" in the usual way:
boost::python::def("accept_vector", py_accept_vector);
Hope that helps!
Jim Bosch
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