c++11可变参模板实现字符串拼接

template<typename OS,typename T> void ostr(OS& o,T t){o << t;}template<typename... ARG> auto argcat(ARG... arg)->string{ostringstream os;int arr[] = { (ostr(os,arg),0)...};return os.str();}int main(){cout << argcat(1, 2.3, "my name is", '\t',"lc") << endl;return 0;}

输出：

12.3my name is  lc