[pygccxml-development] Py++ and pointers to member template with Visual C++ 7.1

[Patrick H. <pat...@pr...>]

We have run into a problem with code generated by Py++ involving  
pointers to member templates. For example, consider this class:

class C
{
public:
    template<typename T>
    T getValue() const
    {
       return static_cast<T>(mValue);
    }

private:
    int mValue;
};

The code generated by Py++ to expose C::getValue() will include  
something similar to the following:

    typedef int (C::* ptr_type)() const;
    ptr_type p = ptr_type(&C::getValue);

The above does not compile with Visual C++ 7.1, though it does compile  
with 8.0 and 9.0. For Visual C++ 7.1, the following syntax must be used:

    typedef int (C::* ptr_type)() const;
    ptr_type p = ptr_type(&C::getValue<int>);

While I do not have a deep familiarity with the C++ standard,  
including the template parameter in the pointer-to expression is what  
I would try to write if I were coding this up manually. Is the second  
form incorrect or just unnecessarily verbose?

Given that the pointer-to expression without the template parameter  
does compile with newer versions of Visual C++, I have to think that  
this is a bug in or a limitation of Visual C++ 7.1. If including the  
template parameter in the pointer-to expression is valid, could a  
change be made to Py++ to include that extra information so that the  
code it generates can be built with Visual C++ 7.1?

  -Patrick


--
Patrick L. Hartling
Senior Software Engineer, Priority 5
http://www.priority5.com/