export module hello;

export namespace hello {
#ifdef _MSC_VER
    int data__;
#else
    extern int data__;
#endif
    void say_hello();

    class say {
    public:
        say(int data);
        void hello();
    
    private:
        int data_;
    };
}
/*
#ifndef _MSC_VER
export namespace {
    void anonymous() {
    }
}
#endif
*/