In C++, a Copy Constructor may be called in following cases:
1. When an object of the class is returned by value.
2. When an object of the class is passed (to a function) by value as an argument.
3. When an object is constructed based on another object of the same class.
4. When compiler generates a temporary object.
It is however, not guaranteed that a copy constructor will be called in all these cases, because the C++ Standard allows the compiler to optimize the copy away in certain cases, one example being the return value optimization (sometimes referred to as RVO).
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- Constructor Delegation in C++
- Constructor Overloading in C++
- Difference Between Constructor and Destructor in C++
- Dynamic Constructor in C++ with Examples
- How to create a List with Constructor in C++ STL
- Passing a vector to constructor in C++
- Advanced C++ | Virtual Constructor
- Is it possible to call constructor and destructor explicitly?
- Is body of a Default Constructor blank in C++?
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