Category: Science & Technology

https://cppcon.org/
https://github.com/CppCon/CppCon2020
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Concepts and ranges change how we should think about documentation in C++.

Concepts give us a new way to explicitly constrain templates without resorting to arcane tricks, directly stating requirements on our interfaces as code. Ranges allow us to restructure our programs to describe what the code should do by composing named patterns rather than how it should do it through state-manipulating operations.

As a facility for specifying requirements, to what extent are concepts self-documenting for users of a given interface? How should we balance pure-code descriptions of our interfaces with textual descriptions? How can we use them in aid of creating documentation tuned for our target audience and give them the information they need in a digestible format? We’ll discuss these questions, propose some answers, look at existing documentation from real-world projects, and use ranges as a case study for documenting concepts-based APIs.

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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.

Sy Brand

Sy Brand is Microsoft’s C++ Developer Advocate. Their background is in compilers and debuggers for embedded accelerators, but they’re also interested in generic library design, metaprogramming, functional-style C++, undefined behaviour, and making our communities more welcoming and inclusive.

In their spare time they watch too many movies and are a published poet.

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

The CppCon YouTube Channel Is Sponsored By:
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SonarSource: https://www.sonarsource.com/

https://cppcon.org/
https://github.com/CppCon/CppCon2020
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The next revision of MISRA C++ is heavily anticipated and the group has been working at an even higher cadence since the shutdown. What you may not know is that there is also a group working on C++ parallel concurrency safety rules to be issued alongside the next MISRA.

There have been very few attempts to take parallelism in a safety critical direction even as many in the industry head towards multicore, manycore, and heterogeneous architectures. This is especially the case in the automotive, medical, and engineering industry and there has been increasing demands for these kinds of guidelines. However, most safety rules tend to focus only on sequential code. There have been a few previous attempts at defining safe parallelism rules by Autosar, High Integrity C++, several H2020 projects, as well as C++ CG, but none have produced statically checkable rules in the format of MISRA. This WG within MISRA C++ attended by safety experts with parallelism background is attempting to unify these attempts.

This talk will summarize the latest progress of this group, reviewing the rules that have the potential of entering MISRA NEXT, as well as those we deferred to a subsequent release. We will discuss the philosophy of why some rules are accepted, or rejected, or deferred. There are currently 18 rules that could be accepted, with another 20 rules that are deferred to the following release. We will speak of the challenge of being C++ parallel safety experts in our respective companies. Finally, while MISRA NEXT will likely aim for C++11, 14, 17, we look into the future, where we also aim to serve the parallelism features in C++20, 23.

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Ilya Burylov

Ilya is an architect of C++ software solutions for autonomous driving market. He is working on contribution into functional safety standard MISRA and C++ standard bodies in threading and vectorization.
Ilya has contributed into various Intel software products such as Intel DAAL and Intel MKL.

Andreas Weis

Andreas Weis has been writing C++ code in many different domains, from real-time graphics, to distributed applications, to embedded systems. As a library writer by nature, he enjoys writing portable code and exposing complex functionalities through simple, richly-typed interfaces. Both of which C++ allows him to do extensively. Andreas is also one of the co-organizers of the Munich C++ User Group, which allows him to share this passion with others on a regular basis.

Michael Wong

Michael Wong is Distinguished Engineer/VP of R&D at Codeplay Software. He is a current Director and VP of ISOCPP , and a senior member of the C++ Standards Committee with more then 15 years of experience. He chairs the WG21 SG5 Transactional Memory and SG14 Games Development/Low Latency/Financials C++ groups and is the co-author of a number C++/OpenMP/Transactional memory features including generalized attributes, user-defined literals, inheriting constructors, weakly ordered memory models, and explicit conversion operators. He has published numerous research papers and is the author of a book on C++11. He has been an invited speaker and keynote at numerous conferences. He is currently the editor of SG1 Concurrency TS and SG5 Transactional Memory TS. He is also the Chair of the SYCL standard and all Programming Languages for Standards Council of Canada. Previously, he was CEO of OpenMP involved with taking OpenMP toward Acceelerator support and the Technical Strategy Architect responsible for moving IBM’s compilers to Clang/LLVM after leading IBM’s XL C++ compiler team.

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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
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It is a virtue to program as const as possible in modern C++. Your program is by design way more type safe, has fewer concurrency issues, and runs with high probability faster.

Const has many flavors in modern C++. Thanks to const, you can protect a value against mutation. With constexpr, you can initialize and compute values at compile time. Thanks to conteval, a computation can only run at compile time. In the end, constinit empowers you to initialize a modifiable value at compile time.

Let me show you in my lecture how you can initialize a value with constexpr and constinit in a thread-safe way. Let me show you how const and constexpr help you protect values from mutation and, therefore, make them immune to data races. Finally, let me show you how constexpr and consteval empowers you to improve the performance of your program and get functions that are by design easy to test, easy to maintain, and implicitly thread-safe.

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Rainer Grimm

I've worked as a software architect, team lead, and instructor since 1999. In 2002, I created company-intern meetings for further education. I have given training courses since 2002. My first tutorials were about proprietary management software, but I began teaching Python and C++ soon after. In my spare time, I like to write articles about C++, Python, and Haskell. I also like to speak at conferences. I publish weekly on my English blog (https://www.modernescpp.com/) and the (https://www.grimm-jaud.de/index.php/blog), hosted by Heise Developer. Since 2016 he is an independent instructor giving seminars about modern C++ and Python. Rainer published several books in various languages to modern C++ and concurrency, C++20, and the C++ Core Guidelines, in particular. Due to his profession, Rainer always searches for the best way to teach modern C++

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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
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In this 20-minute demo, we will walk you through setting up the Qt SDK environment and creating a sample that visualizes a time aware layer using Esri’s toolkit.

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Gela Malek Pour

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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
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C++20 is a unique historic milestone: It's the first edition of Standard C++ that’s “D&E-complete,” with essentially all of the features Bjarne Stroustrup outlined in /The Design and Evolution of C++/ for C++’s evolution. That doesn’t mean evolution is done, however, and work continues on adding a few more important features in C++23 and beyond, including reflection and pattern matching.

In this talk, I’ll show the C++ pattern matching libraries and language proposals we’ve considered, and present my own contribution that builds on them. My paper has two major aims: (1) to make the syntax clean and regular, and avoid inventing a little sublanguage that works only inside “inspect”; and (2) to make it generalizable so we can use it consistently throughout the language, because matching a pattern is a broadly useful feature that ideally should not be limited to “inspect” only… for example, we would love to express patterns in “if” and “requires” conditions too.

I hope that the most important contribution is that, if we add pattern matching in a way that also provides general “match” and “extract” support throughout the language in the form of generalized “is” constraints and “as” casts, the net result is that we can actually simplify C++… yes, even as we add new features and more expressive power. How can that be simpler? By letting programmers directly express their intent where they have to express it indirectly today, by making the language more regular with fewer special cases to learn, by unifying the syntax of existing standard library features that today have a gaggle of different and divergent styles (e.g., variant, optional), and by providing one general and expressive way to use patterns cleanly throughout C++.

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Herb Sutter
Software architect, Microsoft
Herb is an author, designer of several Standard C++ features, and chair of the ISO C++ committee and the Standard C++ Foundation. His current interest is simplifying C++.

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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
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During this talk we will explain the definition of a function overload and what rules the compiler follows to decipher which overload to call. The rules can be complex and may not always do what you expect. We will condense the C++ standard to the essential rules every programmer should be aware of in order to reason through overload resolution.

Knowing how overload resolution works will improve your ability to debug compiler errors and this is vital to write correct code. We will provide simple and concise explanations for various buzzwords like template argument deduction, implicit conversion, standard conversions, and tie-breakers.

This talk is part of the Back to Basics track and the material will be targeted to include all skill levels. Familiarity with C++ is recommended however no prior knowledge of function overloads is required.

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Barbara Geller
I am an independent consultant with over twenty-five years of experience as a programmer and software developer. I have worked with numerous smaller companies developing in-house applications. I have also designed and developed Windows applications for several vertical markets including medical billing, transportation, and construction.

My degree is in Electrical Engineering from Cal Poly Pomona with additional studies in Computer Science.

I am a Co-founder of CopperSpice, a C++ library derived from the existing Qt framework. I designed the Diamond Editor, a cross-platform programmers editor using the CopperSpice libraries. I have programmed in C++, Qt, Visual Objects, Clipper, PHP, and Java.

Ansel Sermersheim
I have been working as a programmer for nearly twenty years. My degree is in Computer Science from Cal Poly San Luis Obispo. I have transitioned to independent consulting and I am currently working on a project for RealtyShares in San Francisco.

Co-founder of CopperSpice, a C++ GUI library.
Co-founder of DoxyPress, a C++ application for generating documentation.
Developer of the open source libraries: libGuarded, CsSignal and CsString.

I have programmed in C++, C, Lisp, Java, and Perl, with extensive knowledge in TCP/IP and mutilthreaded design. I am an avid follower of the C++ standard. Speaker at CppCon 2015, CppNow 2016, CppNow 2017, and several ACCU Bay Area meetings.

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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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Martin Fowler once wrote that high-quality software is actually cheaper to produce than low-quality software. We agree with that sentiment, and we warmly welcomed the C++ Core Guidelines when they were introduced in 2015. Research and surveys conducted in the C++ Community consistently demonstrate the popularity of the Clang family of tools, as well as the growing demand for static analysis to be added to code editors.

In this talk, we’ll explore the current capabilities of existing C++ static analyzers and discuss some of the enforcements listed in the C++ Core Guidelines from a toolability aspect. We’ll also look into the recent “Simplify C++” trend in the language’s evolution, and to wrap things up we’ll take a look at how technology-specific analysis (like MISRA and AUTOSAR) is being adopted.

A variety of checks will be discussed, from catching a dangling pointer to conforming to the preferred code style and naming scheme. And I want to share a crazy idea I have about gamifying static analysis. Let’s play!

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Anastasia Kazakova

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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
---
Mathematical derivatives are vital components of many computing algorithms including: neural networks, numerical optimization, Bayesian inference, nonlinear equation solvers, physics simulations, sensitivity analysis, and nonlinear inverse problems. Derivatives track the rate of change of an output parameter with respect to an input parameter, such as how much reducing an individuals’ carbon footprint will impact the Earth’s temperature. Derivatives (and generalizations such as gradients, jacobians, hessians, etc) allow us to explore the properties of a function and better describe the underlying process as a whole. In recent years, the use of gradient-based optimizations such as training neural networks have become widespread, leading to many languages making differentiation a first-class citizen.

Derivatives can be computed numerically, but unfortunately the accumulation of floating-point errors and high-computational complexity presents several challenges. These problems become worse with higher order derivatives and more parameters to differentiate.

Many derivative-based algorithms require gradients, or the computation of the derivative of an output parameter with respect to many input parameters. As such, developing techniques for computing gradients that are scalable in the number of input parameters is crucial for the performance of such algorithms. This paper describes a broad set of domains where scalable derivative computations are essential. We make an overview of the major techniques in computing derivatives, and finally, we introduce the flagman of computational differential calculus -- algorithmic (also known as automatic) differentiation (AD). AD makes clever use of the ‘nice’ mathematical properties of the chained rule and generative programming to solve the scalability issues by inverting the dependence on the number of input variables to the number of output variables. AD provides mechanisms to augment the regular function computation with instructions calculating its derivatives.

Differentiable programming is a programming paradigm in which the programs can be differentiated throughout, usually via automatic differentiation. This talk introduces the differentiable programming paradigm in terms of C++. It shows its applications in science as applicable for data science and industry. The authors make an overview of the existing tools in the area and the two common implementation approaches -- template metaprogramming and custom parsers. We demonstrate implementation pros and cons and propose compiler toolchain-based implementation either in clang AST or LLVM IR. We would like to briefly outline our current efforts in standardization of that feature.

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Vassil Vassilev & William Moses

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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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Move semantics, introduced with C++11, has become a hallmark of modern C++ programming. However, it also complicates the language in some ways. For thisu reason it is key to understand move semantics (it purpose, its basic rules, and how to use them in practice).

This session teaches the basics of C++ move semantics. Based on the basic principles, it motivates and explains move semantics so that you as an application programmer you can use move semantics correctly und understand its use better.

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Nicolai Josuttis

Nicolai Josuttis (http://www.josuttis.com) is well known in the programming community because he not only speaks and writes with authority (being the (co-)author of the world-wide best sellers The C++ Standard Library (www.cppstdlib.com), C++ Templates (www.tmplbook.com), C++17 - The Complete Guide (www.cppstd17.com), C++ Move Semantics - The Complete Guide (www.cppmove.com), and SOA in Practice), but is also an innovative presenter, having talked at various conferences and events.
He has been an active member of the C++ standards committee for more than 20 years.

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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
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At Bloomberg, we maintain a system that coherently builds and integrates more than 10,000 C++ packages that are maintained independently by thousands of software engineers on hundreds of teams across our Engineering department. In this talk, we will go over the lessons we have learned about maintaining these packages, as well as how package management should interact with third-party libraries, third-party tools, build systems, IDEs, static analysis tools, and refactoring automation. We hope this will start a conversation around the potential requirements for a more complete package management solution in the C++ ecosystem.

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Bret Brown
Software engineer currently focusing on improving C and C++ ergonomics, correctness, and productivity for Bloomberg's Developer Experience department.

Bret likes making authoring and maintaining C++ codebases simpler and more intuitive by treating projects more like cattle and less like pets. He is especially interested in the software development lifecycle, development automation, modern build systems, packaging, code transformation, software governance, and code analysis.
Bret worked in embedded C++ and safety critical C++ for previous employers.

Currently lead of Bloomberg's Build Tools team, responsible for tools such as CMake, pkg-config, and compilation toolchains.

Daniel Ruoso
Currently working as the lead for Code Governance at Bloomberg, where we focus on driving large scale Static Analysis and Automated Refactoring. Daniel has been working over the past 20+ years with a persistent lens on how to help engineers be more effective with build, deployment and analysis tooling on various different environments and languages.

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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/