return-by-value Questions
6
Solved
As I read in books and in the web, in C++ we can overload the "plus" or "minus" operators with these prototypes (as member functions of a class Money):
const Money operator +(const Money& m2) ...
Perk asked 31/1, 2014 at 16:42
2
Solved
I wasn't able to find a concrete answer for the following question:
Consider the following code:
Obj f() {
Obj o2;
return o2;
}
int main() {
Obj o1 = f();
return 0;
}
How many times is the co...
Aga asked 30/1, 2021 at 20:39
3
Solved
What I'm wondering is, how does returning by value a Cat actually differ from returning an std::unique_ptr<Cat> in terms of passing them around, memory management and using them in practice.
...
Teahouse asked 8/6, 2017 at 23:58
2
Solved
Is it possible in modern Fortran to return an array from a function with performance equivalent to having a subroutine fill an array passed as argument?
Consider e.g. as simple example
PROGRAM PR...
Fondly asked 21/6, 2016 at 14:22
5
Solved
Can you explain to me the difference between returning value, reference to value, and const reference to value?
Value:
Vector2D operator += (const Vector2D& vector)
{
this->x += vector.x;...
Collyrium asked 14/2, 2014 at 11:23
3
Solved
2013 Keynote: Chandler Carruth: Optimizing the Emergent Structures of C++
42:45
You don't need output parameters, we have value semantics in C++. ... Anytime you see someone arguing that nonono ...
Blitzkrieg asked 10/2, 2014 at 4:34
4
Solved
why copy constructor is called when we return an object from a method by value. please see my below code in that i am returning an object from a method while returning control is hitting the copy c...
Deherrera asked 24/5, 2013 at 9:32
2
Solved
Can someone verify that the following is a BUG, and explain why? I think I know, but am unclear about the details. (My actual problem involved a vector of enums, not ints, but I don't think it shou...
Disintegration asked 14/3, 2013 at 13:39
5
Solved
Good morning. I am having trouble understanding the logic behind deep and shallow copying with objects in C++ in a shared project, so I have created the following example.
int main() {
ObjectATyp...
Decigram asked 16/1, 2013 at 17:59
3
Solved
Prior to C++11, if I had a function that operated on large objects, my instinct would be to write functions with this kind of prototype.
void f(A &return_value, A const &parameter_value);
...
Melleta asked 16/6, 2012 at 4:54
4
Solved
If I have a class A (which returns an object by value ), and two functions f() and g() having difference in just their return variables :
class A
{
public:
A () { cout<<"constructor, "; }
...
Assail asked 6/6, 2012 at 12:54
1
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