What does a template class do in C + +?

What does a template class do in C + +?

A template class will have generic variables and methods of type “T”, which can later be customized to be used with different data types as per the requirement. As per the standard definition, a template class in C++ is a class that allows the programmer to operate with generic data types.

How to declare a template specialization in C + +?

First of all, notice that we precede the class template name with an empty template<> parameter list. This is to explicitly declare it as a template specialization. But more important than this prefix, is the <char> specialization parameter after the class template name.

Why are there two parameters in a template function?

The compiler automatically determines what type is needed on each call. Because our template function includes only one template parameter ( class T) and the function template itself accepts two parameters, both of this T type, we cannot call our function template with two objects of different types as arguments: 1. 2.

When to use mytype instead of template parameter name?

This process is automatically performed by the compiler and is invisible to the programmer. In this case, we have used T as the template parameter name instead of myType because it is shorter and in fact is a very common template parameter name. But you can use any identifier you like.

Can a template function be declared as a non template function?

A non-template member function and a template member function with the same name may be declared. In case of conflict (when some template specialization matches the non-template function signature exactly), the use of that name and type refers to the non-template member unless an explicit template argument list is supplied.

How to create a template class in C + +?

As you can see at the top of the class, we need to write the template to make the class a template class. Here T is the generic type. And wherever you want generic use the type T. It is not mandatory to use T everywhere when you find any data type in your class.

Which is an example of a class template?

Class Templates Like function templates, class templates are useful when a class defines something that is independent of the data type. Can be useful for classes like LinkedList, BinaryTree, Stack, Queue, Array, etc. Following is a simple example of template Array class.

Can a member template be declared in a derived class?

Using-declarations in derived classes cannot refer to specializations of template conversion functions from base classes. A variable template declaration may appear at class scope, in which case it declares a static data member template. See variable templates for details.