"instantiat ed from here" compile error when using template

[yinglcs]

I have the following code, which use template as the parent class of my
other class.

But I have "instantiat ed from here" compile error at this line:
class C: public B2<A>.

Can some one please tell me why?

class AI {

public:
~AI() {};
virtual void print(int i) = 0;

};
class A {
private:
A(const A& aimpl) {};

public:
int i;
void print(int i) { cout << "hello world " << endl; }
A(): i(9){};
};
template<class T>
class B2: public AI {

public:
~B2() {};
virtual void print(int i) { cout << i<< endl; };
};

class C: public B2<A> { // "instantiat ed from here" compile error
this line

};

int main(int argc, char **argv) {

C c;
c.print(1);
}

[Pete Becker]

yi*****@gmail.c om wrote:

I have the following code, which use template as the parent class of my
other class.

But I have "instantiat ed from here" compile error at this line:
class C: public B2<A>.

Can some one please tell me why?

This message is a helper for one that came earlier. The earlier one told
you what the error was, and where it occurred. This one points you to
the location where the template with the error was being instantiated.

--

Pete Becker
Roundhouse Consulting, Ltd.

[Luke Meyers]

Pete Becker wrote:

yi*****@gmail.c om wrote:

I have the following code, which use template as the parent class of my
other class.

But I have "instantiat ed from here" compile error at this line:
class C: public B2<A>.

Can some one please tell me why?

This message is a helper for one that came earlier. The earlier one told
you what the error was, and where it occurred. This one points you to
the location where the template with the error was being instantiated.

That's compiler-dependent. In my experience, it is a helper for the
message which follows, not the prior.

Luke