Author: digitalmedium1

https://cppcon.org/
https://github.com/CppCon/CppCon2020
---
In my experience as a trainer, YouTuber, and speaker, I find that many people have a mistaken impression of what constexpr is and for what it is suited. I see people over-complicate constexpr by conflating it with meta programming and template-related topics. Students will often fail to recognize where and when constexpr could be used. Experts will get concerned about the "contract" you are making with the user of your library by marking functions as constexpr.

In this talk, I will present a mental model for how you should consider constexpr. I will explain what constexpr is (less mechanically and more metaphorically), give practical applications for constexpr, and help you figure out where constexpr fits into your application or library.

In the most straightforward sense, constexpr is moving work from runtime to compile-time. This mental model that I will present will ask, "what work would you rather do at compile-time?" We will find this answer by looking at constexpr as a continuum. On one end of the continuum is the use case of moving a runtime fixed-size vector into a compile-time fixed-size constexpr array, and on the far end is executing your entire program at compile-time and simply outputting the results at runtime.

---
Jason Turner

Host of C++Weekly https://www.youtube.com/c/JasonTurner-lefticus, Co-host of CppCast http://cppcast.com, Co-creator and maintainer of the embedded scripting language for C++, ChaiScript http://chaiscript.com, and author and curator of the forkable coding standards document http://cppbestpractices.com.

I'm available for contracting and onsite training.

---
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
---
This talk is the Embedded Track Keynote.

Less than 1% of microprocessors sold each year find their way into general purpose computers. Desktops, laptops, and servers of all sizes represent a very small fraction of the compute that surrounds us. We interact with a few of these systems but most go unnoticed. These invisible, unsung embedded devices offer lessons in engineering at all scales and can provide inspiration to seasoned practitioners and future technologists.

Join me as we learn from the embedded world and become inspired to inspire.

---
Michael Caisse started using C++ with embedded systems over 30 years ago. He continues to be passionate about combining his degree in Electrical Engineering with elegant software solutions and is always excited to share his discoveries with others.

Michael works for Ciere Consulting where he provides software consulting and contracting, C++ training and mentoring, and electronic design.

When he isn't fighting with compilers or robots, he enjoys fencing with a sabre.

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

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
---
C++20 is probably the biggest change to the language since ever. In this session, we will look into some changes that templates received with C++20. The biggest change is the introduction of Concepts.

We don’t stop there. We will also talk about improvements to CTAD and NTTP. Of course, we will also look into how templated lambdas work in C++20.

By the end of the talk, attendees have learned about the newest C++20 template updates and how to apply them.

---
Andreas Fertig, CEO of Unique Code GmbH, is an experienced trainer and lecturer for C++ for standards 11 to 20.

Andreas is involved in the C++ standardization committee, in which the new standards are developed. At international conferences, he presents how code can be written better. He publishes specialist articles, e.g., for iX magazine, and has published several textbooks on C++.

With C++ Insights (https://cppinsights.io), Andreas has created an internationally recognized tool that enables users to look behind the scenes of C++ and thus to understand constructs even better.

Before working as a trainer and consultant, he worked for Philips Medizin Systeme GmbH for ten years as a C++ software developer and architect focusing on embedded systems.

---
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 advanced data processing paradigms fit incredibly well to the parallel-architecture that GPU computing offers, and exciting advancements in the open source projects such as Vulkan and Kompute are enabling developers to take advantage of general purpose GPU computing capabilities in cross-vendor mobile and desktop GPUs (including AMD, Qualcomm, NVIDIA & friends). In this talk we will provide a conceptual and practical insight into the cross-vendor GPU compute ecosystem as well as how to adopt these tools to add GPU acceleration to your existing C++ applications.

In this talk we will show how you can write a simple GPU accelerated machine learning algorithm from scratch which will be able to run on virtually any GPU. We will give an overview on the projects that are making it possible to accelerate applications across cross-vendor GPUs. We'll show how you can get started with the full power of your GPU using the Kompute framework with only a handful of lines of C++ code, as well as providing an intuition around how optimizations can be introduced through the lower level C++ interface.

As part of the more advanced example, we will showcase some optimizatiosn that can be leveraged through the hardware capabilities of relevant graphics cards, such as concurrency-enabled GPU queues which allow us to introduce 2x+ performance improvements into advanced data processing workloads. We will dive into the GPU computing terminology around asynchronous & parallel workflow processing, cover the core principles of data parallelism, explain the hardware concepts of GPU queues & queueFamilies, and talk about how advancements in new and upcoming graphics cards will enable for even bigger speedups (such as the AMD architectures or NVIDIA Ampere GA10x architecture which will support up to 3 parallel queue processing workloads).

---
Alejandro Saucedo

Alejandro is the Chief Scientist at the Institute for Ethical AI & Machine Learning, where he leads the development of industry standards on machine learning explainability, adversarial robustness and differential privacy. Alejandro is also the Director of Machine Learning Engineering at Seldon Technologies, where he leads large scale projects implementing open source and enterprise infrastructure for Machine Learning Orchestration and Explainability. With over 10 years of software development experience, Alejandro has held technical leadership positions across hyper-growth scale-ups and has delivered multi-national projects with top tier investment banks, magic circle law-firms and global insurance companies.

---
Videos Streamed & 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
---
In this lecture, we will discuss some of the most painful issues faced by developers attempting to consume C++ libraries from a non-C++ application. These issues are typically first confronted by the non-C++ developer and then more experience interop stakeholders must be brought in. Issues arising during initial consumption are notoriously difficult to diagnose, debug, and understand often requiring some reverse engineering skills. This talk is designed around bridging the gap between C++ library author and the library consumer who is often not a C++ application developer.

---
Aaron R Robinson

Aaron Robinson currently works at Microsoft on the .NET Interop team. He previously worked at The MathWorks helping developers interop their C/C++, Fortran, C#, Java, and Ada code via MEX functions. Aaron took an unusual path to software and graduated with a degree in Social Work - which he declares has provided more long term value than any other aspect of his education - prior to attending grad school for Computer Science.

---
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
---
This presentation is a tutorial covering multiple metaprogramming topics. It builds upon last year's "Template Metaprogramming: Type Traits." That talk walked you through template metaprogramming fundamentals by implementing some basic type traits. This tutorial demonstrates how to build upon these basic building blocks to solve real world problems.

For example, we will explore how to manage types as plain lists and associative collections. However, we will not just demonstrate how to sort a collection of types, but also some practical use cases where such techniques provide significant advantages, both in representation and runtime performance.

We will look some explicit real world examples where we trade an upfront compile time cost for faster runtime performance. We will also explore ways to measure the compile time costs so that we can make educated decisions about how to improve the compile time performance, and determine if that cost is worth the runtime gain.

Thus, the tutorial will walk through a number of metaprogramming techniques and tricks, but with the goal of applying them to solve several explicit real world problems, all the while being very aware of the compile time costs.

---
Jody Hagins

Jody Hagins first compiled "C++" code in 1984, and wrote a specialized LisP editor using Zortech C++ for senior project in 1988. However, he didn't truly start programming in C++ until 1992, when he read The Greatest C++ Book Ever Written, "Advanced C++ Programming Styles and Idioms" by Jim Coplien. That book, combined with cfront, which generated C code from C++ source, gave him the joyful task of writing SVr4 Streams drivers in C++. Ever since, he has been hooked on writing C++ code for kernel modules, large telephony applications, and, since the late 1990s, applications in what is now known as the high frequency trading industry.

---
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
---
In this talk, we will present a new open-source library of cursors. Cursors are inspired by functional lenses and reactive streams to provide composable and modular facades to "single atom" value storages. We will see how this can be used to navigate the tension between object-oriented and value-oriented design, and build an example interactive application using Qt and QML against a value-based data-model.

Value-oriented design reconciles functional and procedural programming by focusing on value semantics. Like functional programming, it promotes local reasoning and composition — it is, however, pragmatic and can be implemented in idiomatic C++. In previous talks, the speaker has discussed how immutable data-structures help use value semantics at scale, and how the Unidirectional Data-flow Architecture (Redux, Elm) provide a solid foundation for designing interactive software based on values and functions.

However, we rarely have the luxury of starting from scratch. We are often embedded in legacy codebases with Frankensteinian designs crystalized over decades of multi-paradigm evolution. Also, it's hard to build serious interactive software without frameworks like Qt or Juce that, with all its power, also impose a Javaish object-oriented approach at the boundaries of our system. In this talk we will learn how novel abstractions and design methodologies can help modernize real world code-bases, incrementally migrating them to a value-oriented design.

---
Juan Pedro Bolivar Puente

Juanpe is a Berlin based freelance software engineer, with a focus on interactive software, modern C++, functional programming and open source strategy. Before he worked for Ableton and he has been involved in various music technology projects. He has also developed for the GNU project and cofounded a Hacklab in Granada.

---
Videos Streamed & 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
---
This is the Closing Keynote of the Back to Basics Track.

Many Stack Overflow questions are straightforward - "How do I do sort a vector in decreasing order?" for example. But some of them are subtle, and the more you look at them, the more different possible answers appear.

In this talk, I will show a few SO posts, and discuss possible solutions. These will involve tradeoffs between different data structures and algorithms, complexity guarantees, algorithm design, performance measurement, and testing alternatives.

This talk requires moderate familiarity with the standard library and the contents of the STL.

---
Marshall Clow

---
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
---
In applications such as video games and audio processing, a program has to not only produce the correct result, but to do so reliably in a deterministic amount of time. The code needs to satisfy real-time constraints, complicated by the fact that it will typically run on a non-real-time OS kernel. Writing code for such constraints significantly differs from writing code that maximises for bandwidth or overall performance.

How well suitable is the C++ standard library for such scenarios? In this talk, we will go through many of its facilities in detail. Which are safe to use in (near-)real-time contexts? Which should be avoided, and why? We will discuss well-established utilities and useful patterns as well as some less commonly known details.

This talk is a different kind of tour through the standard library – and afterwards, you will be more confident in using it!

---
Timur Doumler is the Developer Advocate for C++ at JetBrains. As a developer, he specialises in audio and music software. Timur is an active member of the ISO C++ standard committee, co-founder of the music tech startup Cradle, and conference chair of the Audio Developer Conference (ADC). He is passionate about building inclusive communities, clean code, good tools, low latency, and the evolution of the C++ language.

---
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
---
An essential aspect in designing C and C++ systems is to validate the execution flow and resource contention of a proposed approach in the contexts of symmetry and orthogonality.

The role of symmetry is to provide some level of notional understanding without requiring direct inspection (using “similarity” to enable greater scaling and management of design complexity). The role of orthogonality is to remove edge cases and coupling by making things unrelated (thereby making whole system scaling to be simpler, more efficient, and more adaptable).

These roles establish symmetry and orthogonality as useful tools to define our systems by leveraging different aspects of “knowing” many things about our system components and their possible interactions intuitively, and without tedious scrutiny. Symmetry allows us to “know” things we should not otherwise know; while orthogonality grants simplicity to dismiss as a possibility some behaviors or component interactions within the resulting system.

In practice, we use C and C++ language guarantees to implement design choices. But, these design choices come from integrating: (1) the problem to be addressed; and (2) exploiting symmetry and orthogonality to fabricate a system that is logical, implementable, scalable, and unsurprising.

---
Charley Bay

Charley is a software developer with over three decades of experience using C++ in multiple regulated and high-performance fields focused on large-scale and distributed systems in performance-sensitive environments including time-sensitive processing of large data sets, performance visualization, real-time processing, low-latency, embedded, and system status and control.

---
Videos Streamed & 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/