Smartfunc

#ifndef __SMARTFUNC_HPP__
#define __SMARTFUNC_HPP__
#include <stdarg.h>
#include <map>
#include <cstdio>
#include <string>
#include <sstream>
namespace bstd{
    template<class T, typename ... Args> class smartfunc{
        public:
            T (*funcpt)(smartfunc*, Args...args);
            template<typename argT,typename...ArgsT>
            std::string compile(std::string str,argT arg,ArgsT...args){
                std::ostringstream s;
                s << arg;
                str += ","+s.str();
                return compile(str, args...);
            }
            std::string compile(std::string str){
                return str;
            }
            std::map<std::string,T> m;
            T call(Args... args){
                std::string arg = compile("",args...);
                if(m.find(arg) == m.end()){
                    m[arg] = (*funcpt)(this,args...);
                }
                return m[arg];
            }
            T operator () (Args...args){
                return call(args...);
            }
            smartfunc(T (*functionPointer)(smartfunc*,Args...args)){
                funcpt = functionPointer;
            }
    };
}
/*
EXAMPLE USAGE
long long int fib(smartfunc<long long int,int>*f,int n){
    if(n<2)
        return n;
    return (*f)(n-1) + (*f)(n-2);
}
int main(){
    smartfunc<long long int, int> ffib(fib);
    printf("%d\n",ffib(5));
    printf("%d\n",ffib(100));
}
*/
#endif