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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. struct MyClass {
  6.     MyClass() {}
  7.     MyClass(const MyClass&) {
  8.         cout << "copy ctor invoked" << endl;
  9.     }
  10. };
  11.  
  12. int main(){
  13.     vector<MyClass> objects;
  14.     MyClass obj1;
  15.     objects.push_back(obj1); // Vector filling
  16.     cout << "------" << endl;
  17.     for (auto obj : objects) // Auto loop
  18.     {}
  19.     cout << "------" << endl;
  20.     for (auto& obj : objects)
  21.     {}
  22. }
Success #stdin #stdout 0s 3432KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
copy ctor invoked
------
copy ctor invoked
------
https://ideone.com/YHL86D
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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