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Date: Wed, 22 Jun 2005 17:58:00 -0000
From: Shelly Adhikari <shelly@interrasystems.com>
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To: gcc@gcc.gnu.org
Subject: gcc template error?
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X-SW-Source: 2005-06/txt/msg00975.txt.bz2

Hello Guys,

Thw following program is giving an error. Is the program incorrect (If 
possible, please cite relevant sections from the C++ standard)? Should I 
file a bug?

% /usr/local/gcc-4.0.0/bin/g++ template.cxx
template.cxx: In function 'T<X>* func(T<Y>*) [with X = B, Y = A]':
template.cxx:36:   instantiated from here
template.cxx:21: error: 'A* T<A>::m_' is private
template.cxx:30: error: within this context

// Line 1
class A {
public:
    A() { };
    ~A() { };
};

class B {
public:
    B();
    B(const A& a) { };
    ~B();
};

template <typename X> class T;

template <typename X, typename Y>
T<X>* func(T<Y>* p);

template <typename X> class T {
    X*    m_;
public:
    T(X* x) : m_(x) { };
    ~T() { };
    friend T<class Y>* func<Y, X>(T<X>* p);
};

template <typename X, typename Y>
T<X>* func(T<Y>* p) {
    return (new T<X>(new X(*p->m_)));
}

int main() {
    A* a = new A();
    T<A>*    p = new T<A>(a);
    T<B>*    q = func<B, A>(p);
    return 0;
}

Best Regards,
Shelly