the article does not mention rvalues and move semantics (i think it's one of the bigest features). here is an explanation http://stackoverflow.com/questions/68

the article does not mention rvalues and move semantics (i think it's one of the bigest features). here is an explanation http://stackoverflow.com/questions/6815685/move-semantics-what-its-all-about http://stackoverflow.com/questions/6815685/move-semantics-wh... it is supposed to save extra copies like here string a("a"); string b("b"); string c = a + b; // creates temporary object that is copied into C by value - the temporary is just a 'full copy'; so that for the temporary it needs an extra allocation and strcpy and free. the fix is to add the following to the string class string(string &&r) { ... } string &operator=(string &&r) { ... } so the operator with the && receives and 'rvalue' reference - which is a special reference to just this temprorary and the implementation of this is supposed to swap the data of the temporary with that of the this object; the temporary is then discarded.