[C++-sig] ArgumentError when use the shared_ptr<T>

[ZaeX]

Thanks, Roman. It solved the problem.
Can't believe this '&' takes me two days.

On Tue, Jan 27, 2009 at 4:26 PM, Roman Yakovenko
<roman.yakovenko at gmail.com>wrote:

> 2009/1/27 ZaeX <zaexage at gmail.com>:
> > Hi, c++-sig:
> >
> > I got a problem involving shared_ptr here,
> > according to some threads here I believed it should be solved by
> > implicitly_convertible,
> > however after many tries, I still cannot make it work. although this
> problem
> > may look old, I really need your help or hint.
> > My environment is WinXP + python 2.5.4 + boost1.36
> > /////////////////////////////////////////
> > class A
> > {
> >     std::vector<int> vec;
> > public:
> >     A(){}
> >     A(boost::shared_ptr<A>& ptr) :vec(ptr->vec)
> >     std::vector<int>& GetV(){return vec;}
> > };
> >
> > class D
> > {
> >     boost::shared_ptr<A> m_aa;
> > public:
> >     boost::shared_ptr<A>& GetAA() {return m_aa;}
> >  };
> >
> > implicitly_convertible<boost::shared_ptr<A>, A>();
> > ///////////////////////////////////////
> > I exported the A and D, and also added the implicitly_convertible
> > but when I tried to do this in python:
> >
> > d = D()
> > a = d.GetAA()
> > a.GetV()
> >
> > Python interpreter will complains
> > Boost.Python.ArgumentError: Python argument types in
> >     A.GetV(A)
> > did not match C++ signature:
> >     GetV(class A {lvalue})
> > ---------------------------------------------------------------------
> > Can you give some help on this, I have been stuck here for 2 days.
>
> I suggest you not fight with Boost.Python - pass/return
> shared_ptr<...> by value.
>
> The code will start to work.
>
> --
> Roman Yakovenko
> C++ Python language binding
> http://www.language-binding.net/
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>



-- 
Time is mana, we must hurry
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