Author: digitalmedium1

https://cppcon.org/
https://github.com/CppCon/CppCon2020
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Writing code which successfully accomplishes a task is difficult. Four year software engineering degrees are, after all, spent learning something of substance. This difficulty only compounds as the code in question becomes less and less trivial. Successful accomplishment is not the only outcome of well written, real world software however: Tasks can fail for a variety of reasons.

From a certain point of view success is the least interesting outcome in software engineering. No one is woken up in the small hours of the morning because their software succeeded. Much gets said about the Ariane 5 but have you heard of the Ariane 4 or 6? It’s plausible that dealing with errors appropriately is the most important responsibility of a software engineer.

This talk will discuss errors and exceptions, how, when, and why they should be generated, how code should be structured to handle them, and what techniques can be used to ensure such situations are reported with sufficient context that the cause can be identified and addressed with minimal software engineer involvement.

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Robert Leahy

Robert is a graduate of the University of Victoria where he specialized in graphics, gaming, and digital geometry processing. After 4.5 years in full stack web development he switched to financial infrastructure software development in early 2017. He’s since become involved in the ISO C++ committee while delivering high quality, process-driven code to meet the rigorous performance standards for which finance is so well known.

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Videos Filmed & Edited by Bash Films: http://www.BashFilms.com

YouTube Channel Managed by Digital Medium Ltd https://events.digital-medium.co.uk

The CppCon YouTube Channel Is Sponsored By:
JetBrains : http://jb.gg/cpptools
SonarSource: https://www.sonarsource.com/

https://cppcon.org/
https://github.com/CppCon/CppCon2020
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This is part 2 of a 2 part talk. Part 1 available here: https://youtu.be/q_n0pWyiqUA

Designing good, maintainable classes is a challenge. Sometimes it even feels like there is a decision to make in every single line of code. This talk will help you master this challenge. It will explain …

* … why small classes are beautiful;
* … why it is so important to encapsulate variation points;
* … why inheritance is rarely the answer for customization;
* … how to write good and maintainable constructors;
* … how to make sure class invariants are maintained;
* … how to handle member data;
* … how to write good member functions;
* … how to write good supporting functions;
* … why your private members are not private at all.

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Klaus Iglberger

Klaus Iglberger is a freelancing C++ trainer and consultant. He has finished his PhD in computer science in 2010 and since then is focused on large-scale C++ software design. He shares his experience in popular advanced C++ courses around the world (mainly in Germany, but also the EU and US). Additionally, he is the initiator and lead designer of the Blaze C++ math library (https://bitbucket.org/blaze-lib/blaze/src/master/) and one of the organizers of the Munich C++ user group (https://www.meetup.com/MUCplusplus/).

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Videos Recorded & Edited by Digital Medium: http://online.digital-medium.co.uk

The CppCon YouTube Channel Is Sponsored By:
JetBrains : http://jb.gg/cpptools
SonarSource: https://www.sonarsource.com/

https://cppcon.org/
https://github.com/CppCon/CppCon2020
---
Designing good, maintainable classes is a challenge. Sometimes it even feels like there is a decision to make in every single line of code. This talk will help you master this challenge. It will explain …

* … why small classes are beautiful;
* … why it is so important to encapsulate variation points;
* … why inheritance is rarely the answer for customization;
* … how to write good and maintainable constructors;
* … how to make sure class invariants are maintained;
* … how to handle member data;
* … how to write good member functions;
* … how to write good supporting functions;
* … why your private members are not private at all.

---
Klaus Iglberger

Klaus Iglberger is a freelancing C++ trainer and consultant. He has finished his PhD in computer science in 2010 and since then is focused on large-scale C++ software design. He shares his experience in popular advanced C++ courses around the world (mainly in Germany, but also the EU and US). Additionally, he is the initiator and lead designer of the Blaze C++ math library (https://bitbucket.org/blaze-lib/blaze/src/master/) and one of the organizers of the Munich C++ user group (https://www.meetup.com/MUCplusplus/).

---
Videos Recorded & Edited by Digital Medium: http://online.digital-medium.co.uk

The CppCon YouTube Channel Is Sponsored By:
JetBrains : http://jb.gg/cpptools
SonarSource: https://www.sonarsource.com/

https://cppcon.org/
https://github.com/CppCon/CppCon2020
---
Many years have passed since the release of C++11 and C++14. These standards brought many new features and idioms to the C++ language and revitalized its community.

Nowadays, with C++20 having one foot out the door, it is important to look back at the experience gained using C++11/14 at scale and re-evaluate their impact.

- What have we learned from 8 years of using Modern C++ in production at a large-scale corporation?
- What features were the most useful?
- Which ones were the most misused?

From unexpected benefits/drawbacks to teachability issues, this talk will discuss the most significant consequences of embracing C++11 and C++14 in a company with thousands of engineers. With some *healthy* skepticism, commonly used features and idioms will be reassessed to uncover some unexpected pitfalls or qualities.

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Vittorio Romeo

Vittorio Romeo (B.Sc. Computer Science) has been a Software Engineer at Bloomberg for more than 3 years, working on mission-critical company C++ infrastructure and providing Modern C++ training to hundreds of fellow employees.

He began programming around the age of 8 and quickly became a C++ enthusiast. Vittorio created several open-source C++ libraries and games, published many video courses and tutorials, and actively participates in the ISO C++ standardization process.

He is also an active member of the C++ community and has an ardent desire to share his knowledge and learn from others: he presented more than 20 times at international C++ conferences (including CppCon, C++Now, ++it, ACCU, C++ On Sea, C++ Russia, and Meeting C++), covering topics of various nature.

Vittorio maintains a website with advanced C++ articles and a YouTube channel featuring well-received modern C++11/14 tutorials. Lastly, he’s active on StackOverflow, taking great care in answering interesting C++ question (60k reputation).

When he’s not writing code, Vittorio enjoys weightlifting and fitness-related activities, competitive/challenging computer gaming and sci-fi movies/TV-series.

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Videos Recorded & Edited by Digital Medium: http://online.digital-medium.co.uk

The CppCon YouTube Channel Is Sponsored By:
JetBrains : http://jb.gg/cpptools
SonarSource: https://www.sonarsource.com/

https://cppcon.org/
https://github.com/CppCon/CppCon2020
---
Performing bulk operations is more efficient than performing multiple single operations in many scenarios: memory allocations, I/O, IPC, etc.
At the same time, code that performs operations in bulk requires extra bookkeeping and boilerplate compared to equivalent code which operates on each individual item.
In this talk, we'll see how C++20 coroutines let us get the performance gains of executing operations in bulk, without the maintenance burden.

Often it’s easier to write code that executes on an item at a time rather than on multiple items: it’s easier to write an if condition than to call std::erase_if, it’s easier to call a function than calling std::transform.
When operating on an item at a time, it is also possible to use exceptions for error handling.
Once we change our code to operate on batches of items, the logic often looks completely different from the original one.

Could we keep our code as if we were processing an item at a time, but calling functions on multiple items behind the scenes?
What if we could aggregate all the arguments to a function into a collection, execute the function with the collection of arguments, and redistribute the results to each caller in a completely transparent way?

This talk will show how such a system could be implemented using coroutines.
It will show step by step how to implement a task and awaitable object which can suspend a function in a synchronous context and resume it once the underlying bulk operation has completed, and how to schedule such tasks.

Have you heard of coroutines but haven’t seen an application of them yet?
Did you read about all the new customization points introduced but haven’t still realized how to make use of them?
Are you looking for a practical and interesting use case for coroutines?
This talk is for you!
Join us to learn about a new way of creating powerful abstractions in modern C++.

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Francesco Zoffoli

Francesco Zoffoli is a professional Software Engineer currently working for Facebook, building monitoring systems. Author of the book "C++ Fundamentals", passionate about programming languages and maintainable software, he has been using C++ throughout his career and personal projects. C++ is his language of choice due to its expressivity, especially its metaprogramming capabilities.

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Videos Recorded & Edited by Digital Medium: http://online.digital-medium.co.uk

The CppCon YouTube Channel Is Sponsored By:
JetBrains : http://jb.gg/cpptools
SonarSource: https://www.sonarsource.com/

https://cppcon.org/
https://github.com/CppCon/CppCon2020
---
Every other conference talk these days seems to be showing off some code on Compiler Explorer. But what does all that Assembly actually mean?

In this talk you'll learn the very basics of X86 Assembly and the X86_64 calling convention, just enough to understand the full Assembly listing of simple functions on Compiler Explorer. No previous experience with Assembly is necessary, but a basic understanding of C or C++ is useful.

After this talk you will:
- Be able to paste code from your own project into Compiler Explorer, and either understand the Assembly output or know how to simplify it until you do.
- Have a solid understanding of the fundamentals, so you know what to search for and understand it when you need to know more.

(Compiler Explorer is an increasingly popular tool which allows you to see exactly what the compiler does with your code. Check it out at https://godbolt.org/.)

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Anders Schau Knatten
Anders started programming in Turbo Pascal in 1995 and has worked as a software developer in various languages since 2001. He's currently a Senior Software Engineer at Zivid, where he's working on machine vision in C++. He's the author of https://cppquiz.org and the blog C++ on a Friday https://blog.knatten.org/. He also gives terrible C++ advice as @AffectiveCpp.

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Videos Recorded & Edited by Digital Medium: http://online.digital-medium.co.uk

The CppCon YouTube Channel Is Sponsored By:
JetBrains : http://jb.gg/cpptools
SonarSource: https://www.sonarsource.com/

https://cppcon.org/
https://github.com/CppCon/CppCon2020
---
How do we wield concepts to get effective usage? There's a lot of presentations talking about the technical details of concepts over the past few years, but far fewer delve into how to derive a concept in detail. Simply understanding how language features work isn't good enough: we need to know how to use them in order to get maximum effectiveness out of a feature.

What are concepts supposed to describe? What are patterns to follow and patterns to avoid? What's the difference between a "constraint" and a "semantic requirement"? What's the difference between a concept that's applied to a function and a concept that's applied to a type?

In this session, we will answer all of these questions, by studying an algorithm, identifying its requirements, and discovering a concept.

This session builds off themes from Andrew Sutton's Concepts in 60: Everything You Need to Know and Nothing You Don't, and Sean Parent's Generic Programming.

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Christopher Di Bella

Christopher Di Bella is a software engineer working on Google's Chrome OS toolchain team. In a nutshell, this means he's responsible for delivering a high-quality LLVM toolchain to Chrome OS developers, and some of that work includes libc++. Christopher is passionate about generic programming and education, and is also a #include ＜C++＞ organiser. When he's not programming, Christopher likes to watch films, play games, swim, snowboard, and go on the occasional hike.

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Videos Recorded & Edited by Digital Medium: http://online.digital-medium.co.uk

The CppCon YouTube Channel Is Sponsored By:
JetBrains : http://jb.gg/cpptools
SonarSource: https://www.sonarsource.com/

https://cppcon.org/
https://github.com/CppCon/CppCon2020
---
To meet the performance demands of a large-scale container orchestrator (Apache Mesos) we built a pre-C++11 library that, in 2009, was the first library we knew of that combined an actor programming model with futures/promises. In the first part of this talk we'll discuss why we chose to use futures/promises to build a large-scale distributed system and why actors are the perfect complementary programming model. The library served us well, helping to scale Mesos to clusters larger than 75,000 physical machines, but not without numerous bouts of optimizations and introductions of new, more efficient, constructs. We'll discuss what we learned along the way, in particular that while the intention and interface of the library was good, the underlying implementation of the library performed tons of unnecessary synchronization and dynamic memory allocation.

Now 10 years later we've rebuilt the library from scratch as part of ongoing research into distributed systems at UC Berkeley. We'll discuss how the new library focuses on *continuations* rather than futures/promises while providing the same simplicity as before when composing code. We'll walk through how programmers can use low-level constructs of the library to explicitly compose continuations together, or how they can use higher-level constructs that they can compose without using continuations at all.

The library is coroutine friendly and has some overlap with 'A Unified Executors Proposal for C++' (P0443R13), in particular that both approaches are lazy vs the eager approach of futures/promises. However, our library has a particular focus on supporting actors. This has some important design implications with respect to scheduling and memory allocation that we'll discuss in depth during this presentation, highlighting some of the differences with outstanding proposals.

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Benjamin Hindman

Benjamin Hindman is one of the creators of Apache Mesos. He began working on the project as a PhD student at UC Berkeley, and it followed him to Twitter where he is currently employed. Mesos now runs on thousands of machines at Twitter, Airbnb, etc. -- even when Ben is away skiing in Tahoe or surfing in Santa Cruz. An academic at heart, Ben's research in the areas of programming languages and distributed systems has been published in leading academic conferences. Ben has spoken about his research, Mesos, and his libprocess and stout libraries at numerous conferences and companies. He most recently spoke at FutureStack in SF and the Hadoop Summit Asia in Beijing.

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Videos Filmed & Edited by Bash Films: http://www.BashFilms.com

YouTube Channel Managed by Digital Medium Ltd https://events.digital-medium.co.uk

The CppCon YouTube Channel Is Sponsored By:
JetBrains : http://jb.gg/cpptools
SonarSource: https://www.sonarsource.com/

https://cppcon.org/
https://github.com/CppCon/CppCon2020
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You probably write in C++ not because it is the simplest available language. There are other attributes C++ brings: efficiency, low footprint, direct memory access, enhanced control over runtime behavior, and more. In "The Design and Evolution of C++", Bjarne Stroustrup explains the design decisions taken since the language was conceived and during its evolution. What makes C++ powerful? How has C++ survived more than 4 decades, while other languages have disappeared into oblivion? Why do we still use C++ (and will we still be using it in a decade from now)? And most importantly, why it is not so complicated after all, and even becomes easier to use over time! Being both a teacher and a practitioner, seeing beginners struggle at first with the language but then turn to love it, my goal is to assure you that mastering C++ is doable, then motivate you to do so.

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Amir Kirsh

Amir Kirsh is both a Lecturer and a practitioner. Teaching at the Academic College of Tel-Aviv-Yaffo and at Tel-Aviv University while keeping hands on, mainly on C++, as a Dev Advocate at Incredibuild and previously as the Chief Programmer at Comverse. Amir is also one of the organizers of the CoreCpp conference in Tel-Aviv and the CoreCpp meetup group and a member of the Israeli ISO C++ National Body.
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Videos Filmed & Edited by Bash Films: http://www.BashFilms.com

YouTube Channel Managed by Digital Medium Ltd https://events.digital-medium.co.uk

The CppCon YouTube Channel Is Sponsored By:
JetBrains : http://jb.gg/cpptools
SonarSource: https://www.sonarsource.com/

https://cppcon.org/
https://github.com/CppCon/CppCon2020
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In this practical session, we will go through examples that follow and/or violate the Law of Demeter principle (LoD) [1].

We will take a deep dive into what kind of design issues that exposes and how to fix them.
Additionally, we will focus on the testing aspect of following the LoD principle together with Single Responsibility and Dependency Inversion principles.

At the end of this session, the audience will have a better understanding of how to write a loosely coupled code, how to easily test it and why the Law of Demeter principle is so important in Software Design.

Let's !"only talk to our immediate friends" at CppCon-2021!

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Kris Jusiak
Kris is a Software Architect passionate about programming and who has worked in different industries over the years including telecommunications, games and most recently finance for Quantlab Financial, LLC. He has an interest in modern C++ development with a focus on performance and quality. He is an open-source enthusiast with multiple open-source libraries where he uses template meta-programming techniques to support the C++ rule - "Don't pay for what you don't use" whilst trying to be as declarative as possible with a help of domain-specific languages. Kris is also a keen advocate of extreme programming techniques, Test/Behavior Driven Development and truly believes that 'the only way to go fast is to go well!'.

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Videos Filmed & Edited by Bash Films: http://www.BashFilms.com

YouTube Channel Managed by Digital Medium Ltd https://events.digital-medium.co.uk

The CppCon YouTube Channel Is Sponsored By:
JetBrains : http://jb.gg/cpptools
SonarSource: https://www.sonarsource.com/