[C++-sig] call Python function from C++ without copying the arguments (original) (raw)
David Abrahams dave at boostpro.com
Sat Jan 17 13:38:19 CET 2009
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on Sat Jan 17 2009, "Sebastian Walter" <walter-AT-mathematik.hu-berlin.de> wrote:
Hello,
I want to call a Python function from C++ with an object of a C++ class as argument. The Python-function should change the argument, so changes are visible on the C++ side. Boost::Python automatically makes a copy of all the arguments that are passed to a callable Python object. Is there a way NOT to copy all arguments??
void mytestfunction(object funobj){ A a; cout<<"a.x="<<a.x<<endl; funobj(a);
fun_obj(boost::ref(a))
^^^^^^^^^^^ ^cout<<"a.x="<<a.x<<endl; }
HTH,
-- Dave Abrahams BoostPro Computing http://www.boostpro.com
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