[C++-sig] Re: Passing default argument

[Nikolay Mladenov]

Basavaraj,

arg and args are declared in one header file (in namespace
boost::python). So if you have args declared 
you should have arg declared as well, provided that your BPL version is
recent(CVS).

Nikolay

"Goudar Basavaraj (IFIN DC SMS)" wrote:
> 
> Hi Nikolay,
> 
>         Thanks for the info.  I tried this but am getting error saying
>         "arg undeclared". I tried including few headers but could not
> resolve the problem.
>         What could be the solution.
> 
> Thanks & Regards,
> Basavaraj
> 
> BOOST_PYTHON_MODULE(overload)
> {
>         class_<A>("A")
>         .def("F",&A::f, (arg("a")=2,arg("b")=4,arg("c")=10,arg("d")=4) ))
>         ;
> }
> 
> >  -----Original Message-----
> > From:         Goudar Basavaraj (IFIN DC SMS)
> > Sent: Monday, November 03, 2003 5:11 PM
> > To:   'c++-sig at python.org'
> > Subject:      Passing default argument
> >
> > Hi,
> >
> >       I am facing a problem in passing default parameters to this program.
> >
> > class A
> > {
> >       public:
> >       A(){}
> >       void f(int a=2,int b=4,int c=10,int d=4)
> >       {
> >               printf("HI am here\n");
> >       }
> > };
> > BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS(F1,A::f,0,4)
> >
> > BOOST_PYTHON_MODULE(overload)
> > {
> >     class_<A>("A")
> >       .def("F",&A::f,F1(args("a","b","c","d")))
> >     ;
> > }
> >
> >       I call the overloaded method from python by passing
> >       >>>name=overload.A()
> >       >>>name.F(a=0)  //This works fine
> >       >>>name.F(a=0,b=1)   //This works fine
> >       >>>name.F(b=1)     //Fails.
> >                bad argument type for built in operation
> >
> >
> >       I am not able to figure out whether this is the property of boost or
> > I have to do something else.
> >
> >       Please let me know................
> >
> > Thanks & Regards,
> > Basavaraj