Templates AND operator overloads

[Trauts]

I'm trying to use a template with an assignment operator overload.

I want to do it function style, not class template or there is no point.

Also, I think it is trying to use the default assignment operator...

If I move the mouse cursor over a variable, it doesn't do anything, but if I comment out the template line, it recognizes a variable but won't compile unless I remove teh references to the template.

It never runs my overload, I know that because if I have assert(1<0);, it won't crash. If I tell it to cout something, it won't work either.

Here's a simplified version of my code.

#include <iostream.h>
//#include <string>

class wimpyclass
{
public:
	wimpyclass();
	~wimpyclass();
	void *data;
	int getdata();
	template <class unknowndatatype>
	const wimpyclass & operator = ( const unknowndatatype & rhs );     // assign unknowndatatype
};

wimpyclass::wimpyclass()
{
	int x = 0;
	data = &x;
}

wimpyclass::~wimpyclass()
{
	return;
}

template <class unknowndatatype>
const wimpyclass& wimpyclass::operator =(const unknowndatatype & rhs)
//postcondition: normal assignment via copying has been performed
{
    if ( (data != (void*)&rhs) && (this != &rhs) )                             // check aliasing
    {
        data = (void*)&rhs;										// assign the new void pointer data
		//data = const_cast<void*>(&rhs);								// assign the new void pointer data
    }
	else
		cerr << "\n\nCannot assign to itself\n\n";

    return *this;
}

int wimpyclass::getdata()
{
	return *(int*)&data;
}


int main()
{
	wimpyclass junk1;
	junk1 = 50;
	junk1 = 'a';
	cout << junk1.getdata() << endl << *(int*)&junk1.data << endl;
	
	return 0;
}

I have the void *data public so that I can make sure it is working... and it isn't assigning.

However, if I remove the template and replace those with ints, it will work for ints.

So is it possible to get a template to work with an operator overload?

[Codeplug]

Looks like a pretty cool MSVC bug!!

I looked at the disassembly and the compiler doesn't even generate code for the assignments - debugger just skips right over em....

I did find a work around though - you have to implement the method inline - within the class declaration. The compiler will then show you some errors in the operator=() code! As if your version doesn't even get compiled.

Also, getdata() can be done a little easier by simply casting data to an int.

You could also use "reinterpret_case<void*>()" for your void* casting just to be hip.

gg

[Trauts]

if I remove the template part and change uknowndatatype to int, it works.t hanks tho

[edit]
Eh, sorry... I was using a different version than the one I posted

My version worked, that one had errrors.