[C++-sig] virtual functions with default implementation

[Alex Mohr]

On 8/17/2015 11:39 AM, Stefan Seefeld wrote:
> For the case with default implementation, the tutorial gives this wrapper:
>
>    struct BaseWrap : Base, bpl::wrapper<Base>
>    {
>      virtual std::string func() const
>      {
>        if (bpl::override f = this->get_override("func"))
>          return f();
>        else
>          return Base::func();
>      }
>      std::string default_func() const { return this->Base::func();}
>    };
>
> and it seems to me much more natural to implement the "default" case
> directly in the "else" branch above, rather than add it to the "def()" call.

I think this might be so that python can invoke the superclass (C++) 
implementation directly in its override, but I'm not 100% sure.

Alex