#include <iostream>
 
class Logger
{
    public:
        void log(std::string entry)
        {
            std::cout << entry << std::endl;
        }
};
 
class A
{
    Logger mylog;
    public:
        void foo()
        {
            std::cout << "Doing foo" << std::endl;
        }
 
        Logger& getLogger()
        {
            return mylog;
        }
};
 
#define CALL_FUNC_AND_LOG(obj,func) \
    { obj.getLogger().log("Logging "#func); obj.func(); }
 
int main()
{
    A a;
    CALL_FUNC_AND_LOG(a,foo);
    return 0;
}
 

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