2 Lines Of Code and 3 C++17 Features - The overload Pattern

While I was doing research for my book and blog posts about C++17 several times I stumbled upon this pattern for visitation of std::variant:

template<class... Ts> struct overload : Ts... { using Ts::operator()...; };
template<class... Ts> overload(Ts...) -> overload<Ts...>;

With the above pattern, you can provide separate lambdas “in-place” for visitation.

It’s just two lines of compact C++ code, but it packs a few interesting concepts.

Let’s see how this thing works and go through the three new C++17 features that make this patter possible.

A Gentle Intro to Developing C++ Apps for AWS and S3

Amazon Web Services (AWS) provide multiple tools for developing a native cloud application. In particular, the Software Development Kit (SDK) for C++ programming language enables developers to build powerful and efficient AWS applications for any platform. This includes Android, iOS, Linux and Windows apps.

This article introduces the basic concepts of C++ app development for AWS and S3, including real code examples.

C++ at the end of 2019

2019 is almost over. Let’s reflect on how C++ changed during this time! What were some significant events, how the Standard progressed, how tools changed and many more.

Let’s have a look!

C++ at the End of 2019, Survey

It’s almost the end of the year!

I prepared a quick survey, so we can learn about our experience with the language.

How C++17 Benefits from the Boost Libraries

In today’s article, I’ll show you battle-tested features from the well-known Boost libraries that were adapted into C++17.

With the growing number of elements in the Standard Library, supported by experience from Boost you can write even more fluent C++ code.

Read on and learn about the cool things in C++.

Threading in C++17: Loopers & Dispatchers

Multithreading is a tough nut in software development. Not just because there are dozens of ways to approach a single problem, but also since one can get so many things wrong.

In this article, I want to present how to realize the concept of a Looper with Dispatchers in C++17.

How to Convert Numbers into Text with std::to_char in C++17

In this post, I’ll show you how to use the newest, low-level, conversion routines form C++17. With the new functionality, you can quickly transform numbers into text and have super performance compared to previous techniques.

A Programmer’s Guide to Performance Analysis & Tuning on Modern CPUs

They say “performance is king’… It was true a decade ago and it certainly is now. With more and more data the world generates each day, we need more and more computing power to process it.

It used to be the case that some SW vendors preferred to wait for a new generation of HW to speed up their application and did not spend human resources on making improvements in their code. When it’s no longer the case that each HW generation provides a significant performance boost, we must start paying more attention to how fast our code actually runs.

Lazy initialisation in C++ and Multi-threading

In the previous post about lazy initialisation, we showed examples and differences between using raw pointers, unique_ptr and std::optional to store the object and create it later. However, we implemented the samples from the perspective of single-threaded scenarios.

In this post, we’ll try to fill the gap and show you how to make your lazy objects available in a multithreading environment.

Five Awesome C++ Papers for the Belfast ISO Meeting and C++20 Status

Following the pattern for other ISO C++ Meetings, I prepared a blog post where you’ll learn about:

• The current status of C++20
• an overview about the Belfast meeting (4th till 9th Nov)
• a few interesting papers that are worth reading

Let’s start!

#C++ Links #37 - The case for C++ and Big Four of C++20

Welcome to new C++ Links - most relevant and useful articles, podcasts and videos that happen between 25th October and 1st November 2019.

Today you will find links to articles about refactoring, the story of std::less, what is lazy initialization and why you should learn C++. Let’s start!

Lazy Initialisation in C++

Lazy initialisation is one of those design patterns which is in use in almost all programming languages. Its goal is to move the object’s construction forward in time. It’s especially handy when the creation of the object is expensive, and you want to defer it as late as possible, or even skip entirely.

Keep reading and see how you can use this pattern with the C++ Standard Library.

C++ Tricks: IIFE for Complex Variable Initialization

What do you do when the code for a variable initialization is complicated? Do you move it to another method or write inside the current scope?

In this blog post, I’d like to present a trick that allows computing a value for a variable, even a const variable, with a compact notation.

C++ Ecosystem: Compilers, IDEs, Tools, Testing and More

To write a professional C++ application, you not only need a basic text editor and a compiler. You require some more tooling. In this blog post, you’ll see a broad list of tools that make C++ programming possible: compilers, IDEs, debuggers and other.