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Christoph Bartoschek · Guest

Hi,

I have a handle class that wraps pointer handles. Now I want to compare it
to the 0 pointer but the compiler does not find the operator==. Here is a
stripped down example:

#include <iostream>

class A {
};

template <typename T> class B {
};

bool operator==(A const & lhs, A const & rhs) {
return true;
}

template <typename T, typename U>
bool operator==(B<T> const & lhs, U * rhs) {
return false;
}

int main() {
B<int> b;
std::cout << (b == 0) << std::endl;
}

Is it somehow possible to let the call (b == 0) succeed?

I think the problem has its cause in a missing 0 pointer literal in C++. Is
such a literal added in the next standard?

Greetings
Christoph

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