c++ - push_back object reference -

as saw code, wondering run without problems.

the object passed reference isn't copy of it. if put reference vector , object out of scope, shouldn't accessible anymore.

but does. reason why works push_back() creates copy of referenced object. answer of behavior?

struct struct1 {     int value; };  std::vector<struct1> testvect;  void pushvect(struct1 & element) {     testvect.push_back(element); }  void fillvect() {     struct1 s1;     (int = 0; < 10; i++) {         s1.value = i;         pushvect(s1);     } } 

the push_back methods of vector taking care of making copy itself: c++ reference

adds new element @ end of vector, after current last element. content of val copied (or moved) new element.

so during call

 estvect.push_back(element); 

the vector works copy. therefore there no problem.