Re: Is this correct C++?

today I was searching for over an hour for the reason of a compiler
error after a change I made (finally I found it). That was really a
strange error! I do not know, if the "original" code was legal C++.

Here an example:

class A {
        public:
                A(), // Notice the comma instead of a semicolon!
                A(int i);
        private:
                int mValue;
};

class __declspec(dllexport) B {
        public:
                B();
                B(int i);

        private:
                int mValue;

};

A::A()
: mValue(0)
{
        std::cout << "A's default constructor called!" << std::endl;}

A::A(int i)
: mValue(i)
{
        std::cout << "A's int-constructor called!" << std::endl;

}

B::B()
: mValue(0)
{
        std::cout << "B's default constructor called!" << std::endl;}

B::B(int i)
: mValue(i)
{
        std::cout << "B's int-constructor called!" << std::endl;

}

int main(int argc, char *argv[])
{
        A a1;
        A a2(2);

        B b1;
        B b2(2);

        return 0;

}

This compiles fine under VC++2005 although A's default constructor
declaration is terminated with a comma (is the comma operator allowed
here???).

But, if I change the declaration of B into:

class __declspec(dllexport) B {
        public:
                B(), // Notice the comma instead of a semicolon!
                B(int i);
        private:
                int mValue;
};

Then my compiler reports error C2487: member of dll interface class may
not be declared with dll interface

So my questions are:
1. Is "terminating" comma in a class constructor declaration legal?

2. Is it a compiler bug?