Hi,
I was wondering the best way to solve this problem:-
void WrapperClass::parse_args(boost::python::list argv)
{
int argc = boost::python::len(argv);
const char* const* pargv = boost::python::extract<const char*
const*>(argv); /// <----
WrappedClass::parse_args(argc, pargv);
}
This doesn't work unfortunately. (Sorry, that's not very helpful, I know;
I can't remember the exact error right now).
I've had a look through boost/python/extract.hpp and frankly have no idea
how I'd extend it for this use case, but I have hacked together a rather
bloated and repetitive solution that I copy and paste each time I have to
do the same thing. e.g.
void WrapperClass::parse_args(const boost::python::list& argv)
{
int argc = boost::python::len(argv);
// - Could be a one-liner call to extract<>():-
const char** pyargv = new const char*[argc+1];
boost::python::stl_input_iterator<std::string> begin(argv), end;
int i=0;
while (begin != end)
{
pyargv[i++] = (*begin).c_str();
begin++;
}
pyargv[i] = '\0';
const char* const* p_argv = &pyargv[0];
/// ----------
WrappedClass::parse_args(argc, p_argv);
delete[] pyargv;
}
This took quite a lot of trial and error to get running correctly, but is
there a way to perform this type of extraction already? Could I extend
boost::python::extract to do it for me? If so, please could someone show
me how I could?
Cheers,
Alex
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