Create and Delete

Below, we examine the different methods available for constructing and destroying containers with particular parameters.

We can construct each container using a multitude of constructors. To delete all elements of a container cont, use cont.clear(). It makes no difference if you create and delete a container or if we add and remove elements. Each time the container takes care of memory management.

The table shows the constructors and destructors of a container. All these functions can be used with std:vector.

Type Example
Default std::vector<int> vec1
Range std::vector<int> vec2(vec1.begin(), vec1.end())
Copy std::vector<int> vec3(vec2)
Copy std::vector<int> vec3= vec2
Move std::vector<int> vec4(std::move(vec3))
Move std::vector<int> vec4= std::move(vec3)
Sequence (Initializer list) std::vector<int> vec5 {1, 2, 3, 4, 5}
Sequence (Initializer list) std::vector<int> vec5= {1, 2, 3, 4, 5}
Destructor vec5.~vector()
Delete elements vec5.clear()

Creation and deletion of a container

Because std::array is generated at compile-time, there are a few things that are special. std::array has no move constructor and can’t be created with a range or with an initializer list. However, an std::array can be initialized with an aggregate initialization. Also, std::array has no method for removing its elements.

Now we can use the different constructors on the different containers.

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