A coroutine is one of the major feature introduced with the C++20 standard apart from Module, Ranges & Concept. And you see how happy I am to unfold it. I already set the baseline on this topic with my previous article that Coroutine in C Language, where we saw, how suspension-resumption of execution works! With this article “C++20 Coroutine: Under The Hood”, we will see how compiler creates magic & standard library helps it with basic infrastructure making C++20 coroutine more sophisticated(yet complex) & scalable/customizable.

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At any point, you feel…


It’s been quite a while that I haven’t published anything on my blog. But that’s due to the job change. I hope you understand that it has never been easy to re-settle in a new environment with new people while maintaining a steep technical learning curve. It takes time to tune yourself accordingly. Anyways, I wrote on “Coroutine in C Language” as a pre-pend to my upcoming post on C++20 Coroutine. Today we will see “How Coroutine Works Internally?”.

/!\: This article has been originally published on my blog. …


Chain of Responsibility is a Behavioural Design Pattern that provides facility to propagate event/request/command/query to the chain of loosely coupled objects. Chain of Responsibility Design Pattern in Modern C++ lets you pass requests along a chain of handlers & upon receiving a request, each handler decides either to process the request or to forward it to the next handler in the chain.

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By the way, If you haven’t check out my other articles on Behavioural…


In software engineering, Structural Design Patterns deal with the relationship between objects i.e. how objects/classes interact or build a relationship in a manner suitable to the situation. The Structural Design Patterns simplify the structure by identifying relationships. In this article of the Structural Design Patterns, we’re going to take a look at Proxy Design Pattern in C++ which dictates the way you access the object.

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If you haven’t check out other Structural Design Patterns, then…


Flyweight Design Pattern is a Structural Design Pattern that concerned with space optimization. It is a technique to minimizes memory footprint by sharing or avoiding redundancy as much as possible with other similar objects. Flyweight Design Pattern in Modern C++ is often used in a situation where object count is higher which uses an unacceptable amount of memory. Often some parts of these objects can be shared & kept in common data structures that can be used by multiple objects.

/!\: This article has been originally published on my blog. …


In software engineering, Structural Design Patterns deal with the relationship between object & classes i.e. how object & classes interact or build a relationship in a manner suitable to the situation. The Structural Design Patterns simplify the structure by identifying relationships. In this article of the Structural Design Patterns, we’re going to take a look at the not so complex yet subtle design pattern that is Decorator Design Pattern in Modern C++ due to its extensibility & testability. It is also known as Wrapper.

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Facade Design Pattern is a Structural Design Pattern used to provide a unified interface to a complex system. It is same as Facade in building architecture, a Facade is an object that serves as a front-facing interface masking a more complex underlying system. A Facade Design Pattern in C++ can:

  • Improve the readability & usability of a software library by masking interaction with more complex components by providing a single simplified API.
  • Provide a context-specific interface to more generic functionality.
  • Serve as a launching point for a broader refactor of monolithic or tightly-coupled systems in favour of more loosely-coupled code…


GoF describes the Composite Design Pattern as “Compose objects into a tree structure to represent part-whole hierarchies. Composite lets the client treat individual objects and compositions of objects uniformly”. This seems over-complicated to me. So, I would not go into tree-leaf kind of jargon. Rather I directly saw you 2 or 3 different ways to implement Composite Design Pattern in Modern C++. But in simple words, the Composite Design Pattern is a Structural Design Pattern with a goal to treat the group of objects in the same manner as a single object.

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Bridge Design Pattern is a Structural Design Pattern used to decouple a class into two parts — abstraction and it’s implementation — so that both can be developed independently. This promotes the loose coupling between class abstraction & its implementation. You get this decoupling by adding one more level of indirection i.e. an interface which acts as a bridge between your original class & functionality. Insulation is another name of Bridge Design Pattern in C++ world.

“All problems in computer science can be solved by another level of indirection.” — David Wheeler

By the way, If you haven’t check out…


In software engineering, Structural Design Patterns deal with the relationship between object & classes i.e. how object & classes interact or build a relationship in a manner suitable to the situation. The structural design patterns simplify the structure by identifying relationships. In this article of the Structural Design Patterns, we’re going to take a look at Adapter Design Pattern in Modern C++ which used to convert the interface of an existing class into another interface that client/API-user expect. Adapter Design Pattern makes classes work together that could not otherwise because of incompatible interfaces.

/!\: This article has been originally published…

Vishal Chovatiya

🔗 http://www.vishalchovatiya.com, Software Developer⌨, Fitness Freak🏋, Geek🤓, Hipster🕴, Productivity Hacker⌚, Always a Student👨‍🎓 & Learning Junkie📚.

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