[C++-sig] (Nat Goodspeed) pass function pointerto c

[Qinfeng(Javen) Shi]

Hi Nat,

Thank you very much.
I tried what you said, but it seems boost::python::object can't be converted
to float by (float) (op(a,b)).  So I converted the pointer of op's result
into float*, but got a unexpected result. Something wrong with my code?

-------------------------c extension---------------
boost::python::object op;

void process(arg1,..., boost::python::object arg_op){
   ...
   op = arg_op;
   ...
   float a = 1;
   float b = 2;

   boost::python::object rlt = op(a,b);
   float * f = (float *) (rlt.ptr());
   printf("%f \n",*f);
   ...
}
---------------------result-----------------------------
>>> import hello
>>> hello.funcPtrTest(hello.add)
0.000000
>>> hello.funcPtrTest(hello.minus)
0.000000
>>>
-- 
Qinfeng(Javen) Shi

Research School of Information Sciences and Engineering
Australian National University
Locked Bag 8001
Canberra ACT 2601
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/cplusplus-sig/attachments/20061009/42fa30ac/attachment.htm>