Gain insights into software design patterns and architecture in C++. Learn about C++ idioms, concurrency patterns, and apply the right solutions to improve code quality and productivity.

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Software engineering researchers and practitioners noticed that parts of software projects could often be solved using approaches that were discovered earlier to solve similar problems. This led to the documentation of software design and architectural patterns, which are known solution approaches to a class of problems. 

This course starts by putting software patterns into perspective by answering the question, “What is a software pattern, and how is it different from an algorithm?” You will then learn about the two classes of patterns—software design and architecture patterns. Next, you’ll learn common C++ idioms. Finally, you will learn about software patterns for concurrency. 

By the end of the course, you will have useful and practical tools to improve the quality of your code and productivity. You’ll also be able to analyze a given part of your software project, pick the right pattern for the job, and apply it.

Master Software Design Patterns and Architecture in C++

# Static polymorphism example

In the coding playground below, we have taken an example of logging messages to the console. We've created a type hierarchy with a templatized (generic) `struct` named `MessageSeverity` (**lines 13–21**) defined as the base. There are three subtypes: 
* `MessageInformation` on **lines 23–27**
* `MessageWarning` on **lines 29–33**
* `MessageFatal` on **line 35** 

The base structure defines a member function, `writeMessage()`, which calls the `writeMessageImplementation()` function of the actual subtype (**line 16**). This structure also defines a default implementation of `writeMessageImplementation`. The `MessageFatal` class utilizes this default implementation by means of inheritance, whereas the other two subtypes override this function.

In `main()`, we create instances of each type of `struct` and call the `writeMessage()` function. The compiler binds the calls on **lines 50 and 53** to the overridden functions, whereas the call on **line 56** is bound to the base implementation.





Learn about the types of polymorphism with coding examples. 

Introduction

Introduction to Design Patterns

Deep Dive into Design Patterns

More Design Patterns

Idioms

Architectural Patterns

Patterns for Concurrency

Conclusion

Polymorphism Examples

Static polymorphism example