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When were C++ smart pointers introduced?
1990s
Smart pointers were first popularized in the programming language C++ during the first half of the 1990s as rebuttal to criticisms of C++’s lack of automatic garbage collection.
What is smart pointer in C++ example?
Smart pointers are used to make sure that an object is deleted if it is no longer used (referenced). The unique_ptr<> template holds a pointer to an object and deletes this object when the unique_ptr<> object is deleted.
How is a smart pointer used in a class template?
As shown in the example, a smart pointer is a class template that you declare on the stack, and initialize by using a raw pointer that points to a heap-allocated object. After the smart pointer is initialized, it owns the raw pointer. This means that the smart pointer is responsible for deleting the memory that the raw pointer specifies.
How are smart pointers introduced in C + + 11?
So in C++ 11, it introduces smart pointers that automatically manage memory and they will deallocate the object when they are not in use when the pointer is going out of scope automatically it’ll deallocate the memory. Consider the following simple C++ code with normal pointers.
How are smart pointers different from normal pointers?
Actually, smart pointers are objects which behave like pointers but do more than a pointer. These objects are flexible as pointers and have the advantage of being an object (like constructor and destructors called automatically). A smart pointer is designed to handle the problems caused by using normal pointers (hence called smart).
When do smart pointers go out of scope?
Since the destructor is automatically called when an object goes out of scope, the dynamically allocated memory would automatically be deleted (or reference count can be decremented). Consider the following simple smart ptr class.