using std::cpp 2020

C++17 is a remarkable collection of many features both in the core language and the library. But the real power comes by using them together. And after 3 years of experience, we know enough to give good examples and advice.

This talk will show some code examples combining various C++17 features. From this, you will get an idea of how powerfull C++17 really is.

Where and why is used C++ in the Banking environment. Use cases of the big players and a simple approach to a possible future in the short term.

Serverless is the native architecture of the cloud that enables you to shift more of your operational responsibilities to the cloud, increasing your agility and innovation. Serverless allows you to build and run applications and services without thinking about servers. It eliminates infrastructure management tasks such as server or cluster provisioning, patching, operating system maintenance, and capacity provisioning. You can build them for nearly any type of application or backend service, and everything required to run and scale your application with high availability is handled for you. Does it sound good? In this session we will learn how to deploy serverless C++ applications using the AWS Lambda C++ Runtime API. We will also show how to call AWS Services from your C++ functions.

I'm not convinced that std::variant is done. After a brief summary of key design decisions and other work in the same problem space I will highlight where I have had difficulties with the current std::variant in my code and explore alternative implementations that may work better. I will present a strategy for the positional association of variant alternatives with corresponding functions as opposed to a classic overload set approach to visitation and discuss its pros and cons in different scenarios as well as how it could be added to the standard library.

Reproducible builds are an essential topic for any commercial software vendor. The requirements for assuring those make organizations take architectural decisions that impact deeply the future of their products for years. This is an exploration in what it takes to design, create and maintain a complete C++ toolchain without breaking the back of the organization with legacy.

C++20 Ranges have arrived in town! Come with us on a walktrough of this new addition to the standard and learn how to use ranges, what their underpinning concepts are, what's so good about them and how you can begin using them now even before C++20-compliant compilers ship in. As a glimpse of what's ahead, we'll finish touching upon some new developments like coroutines, executors and sender/receivers, which interact with ranges in exciting and beautiful ways.

• What are the artifacts that will be generated by C++ modules? How can be redistributed?
• Is the ABI improved with C++ modules?
• Are the ".bmi" files redistributable? Are they multi-platform and multi-compiler?
• Will be package management in C++ easier or more standard with modules?

Modern development environments rely on static analysis of the programming language at hand to provide many useful features ranging from syntax highlighting to automated refactorings. The translation model of C++ consists of multiple phases. In one of them the preprocessor executes all preprocessing directives, which basically is a very primitive transformation of the source code. This translation step incurs a semantic gap between the source code in the files and the resulting C++ source code. Modules, introduced in C++20, reduces this problem, but cannot resolve it completely. I will present a tool developer's perspective on this issue and the challenges it creates for static analysis and automated code transformation tools.

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.