Core C++ in Cyberspace! - Online Event

Join us for our first ONLINE event!

The event will also include a Show and Tell section, In which YOU will be able to present a short slide.

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18:50 Gathering and socializing
19:00 Welcome notes, Adi Shavit
19:15 Package management for Android C++
19:30 Variations on Variant, Roi Barkan
20:15 Break
20:20 Show and Tell
21:00 End of event

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• Package management for Android C++, Alex Cohn *

Android developers have been using native code (mostly C++ and C) since the very beginning, but bundling such libraries in apps has never been painless. Recently, Google has built a new package management system: https://google.github.io/prefab which is fully integrated with other tools that Android developers are familiar with and promises easier lives for both consumers and maintainers of native libraries. In this short talk, I will show an example of using Prefab, what it solves and what it doesn't solve yet.

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• Variations on Variant, Roi Barkan *

std::variant was added to C++ in 2017 as a type-safe alternative to C's union. To start us off, I will shortly introduce the rationale of std::variant and the typical ways in which it can be used. I will also try to give insights into the way std::variant is typically implemented, highlighting the memory layout and its run-time performance implications.

The bulk of the talk will then focus on the key differences between std::variant and union, and discuss a common use-case where unions are typically used which std::variant does not support - serialization of streams of a trivially copyable object to files or to network. Then, I'll suggest 3 approaches to tackle this shortcoming: Intrusive-Variant, Variant-of-Base, and Variant-of-BasePtr. After presenting and describing the 3 approaches above, I will dive deeper into the counterintuitive uses of std::variant, such as a simple and safe mechanism for de-virtualization.

After attending this talk, participants should be better equipped to use this relatively new concept to modernize existing low-level C style code and will have a better understanding of how variants work under the hood.

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• Show and Tell *

An audience participation section, in which YOU will be able to present 1 slide/picture/code snippet and talk about it for up to 5 minutes.

This is a great way to practice passing an idea in 5 min and share your thoughts. Feel free to get creative! :)

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The event will NOT BE RECORDED, so don't miss our special CoreCpp online meetup!

Please notice that since it's an ONLINE event, the talk will start as scheduled.