Class Templates
In this lesson, we'll learn about the class templates.
We'll cover the following
A class template defines a family of classes.
Syntax
template < parameter-list >
class-declaration
Explanation
parameter-list: A non-empty comma-separated list of the template parameters, each of which is either a non-type parameter, a type parameter, a template parameter, or a mixture of any of those.
class-declaration: A class declaration. The class name declared becomes a template name.
Instantiation
The process of substituting the template parameters with the template arguments is called instantiation
.
In contrast to a function template, a class template is not capable of automatically deriving the template parameters. Each template argument must be explicitly specified. This restriction no longer exists with C++17.
Let’s have a look at the declaration of function and class templates:
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