Home How is a local variable created in functions?
 Lets say I have this code: #include using namespace std; class A{ public: A() { cout << "In normal ctor\n"; } A(const A& a) { cout << "In cpy ctor\n"; } A(A&& a) { cout << "In move ctor\n"; } ~A() { cout << "In dtor\n"; } }; A func(A a) { return a; } void main(){ A a1; A a2 = func(a1); }  The output is the following: In normal ctor In cpy ctor In move ctor In dtor In dtor In dtor  Now I'm having trouble understanding what's happening inside the function ''func''. When a1 is sent to the function, the function doesn't receive it byRef,but rather it ''creates'' it's own version of a1 which is 'a'. That's why when the function ends, the object ''dies'' and it goes the the destractor. So why doesn't it also go to the constructer in the first place? (Assuming that a local object is really created there) Is there any copying that's happening behind the scenes? Thanks in advance!