Course Content

C++ Templates

1. Creating First Template

Introduction to Templates Basic Syntax of Template Creating Your First Template Multiple Typenames Naming Conventions

2. Templates Usage

Typename Parameter as a Return Type Implicit and Explicit Type Specification Non-type Template Parameters

3. Class Templates

Introduction to Class templates Template Classes and STL Templates with Default Type Parameters Class Template Argument Deduction

4. Template Specialization

Introduction to Template Specialization How to Use Template Specialization Partial Template Specialization Template Constraints Overview

Typename Parameter as a Return Type

Templates are not just for defining the types of parameters. A powerful feature of templates is that the return type of a function can also depend on the template parameter. This gives you the flexibility to create generic functions with return types that adjust based on the template type provided.

main


              1234567891011121314
            
#include <iostream>

template<typename T> 
T MyFirstTemplateReturn() 
{
	// Returning a default-initialized value of type T
	return T{};
}

int main() 
{
    // Call the template with the void type
    std::cout << typeid(MyFirstTemplateReturn<void>()).name() << std::endl;
}

In the example above, the function's return type is defined by the template parameter T. When we specify void as the type, the compiler interprets it accordingly.

Task

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Create a simple template that returns the passed value

Write a simple template function called GetValue.
Use the template's typename parameter as the return type.
Add a parameter to the template function with the same type as the return type.
Return the function's parameter.

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Section 2. Chapter 1

Typename Parameter as a Return Type

main


              1234567891011121314
            
#include <iostream>

template<typename T> 
T MyFirstTemplateReturn() 
{
	// Returning a default-initialized value of type T
	return T{};
}

int main() 
{
    // Call the template with the void type
    std::cout << typeid(MyFirstTemplateReturn<void>()).name() << std::endl;
}

In the example above, the function's return type is defined by the template parameter T. When we specify void as the type, the compiler interprets it accordingly.

Task

Swipe to show code editor

Create a simple template that returns the passed value

Write a simple template function called GetValue.
Use the template's typename parameter as the return type.
Add a parameter to the template function with the same type as the return type.
Return the function's parameter.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 2. Chapter 1

Typename Parameter as a Return Type

main


              1234567891011121314
            
#include <iostream>

template<typename T> 
T MyFirstTemplateReturn() 
{
	// Returning a default-initialized value of type T
	return T{};
}

int main() 
{
    // Call the template with the void type
    std::cout << typeid(MyFirstTemplateReturn<void>()).name() << std::endl;
}

In the example above, the function's return type is defined by the template parameter T. When we specify void as the type, the compiler interprets it accordingly.

Task

Swipe to show code editor

Create a simple template that returns the passed value

Write a simple template function called GetValue.
Use the template's typename parameter as the return type.
Add a parameter to the template function with the same type as the return type.
Return the function's parameter.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

main


              1234567891011121314
            
#include <iostream>

template<typename T> 
T MyFirstTemplateReturn() 
{
	// Returning a default-initialized value of type T
	return T{};
}

int main() 
{
    // Call the template with the void type
    std::cout << typeid(MyFirstTemplateReturn<void>()).name() << std::endl;
}

In the example above, the function's return type is defined by the template parameter T. When we specify void as the type, the compiler interprets it accordingly.

Task

Swipe to show code editor

Create a simple template that returns the passed value

Write a simple template function called GetValue.
Use the template's typename parameter as the return type.
Add a parameter to the template function with the same type as the return type.
Return the function's parameter.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Section 2. Chapter 1

Switch to desktop for real-world practiceContinue from where you are using one of the options below