October 25, Pavia, Italy
November 6-8, Berlin, Germany
November 3-8, Kona, HI, USA
By Adrien Hamelin | Aug 5, 2020 09:33 AM | Tags: c++20
Small thing to make life better.
Various Template Improvements with C++20
by Rainer Grimm
From the article:
Admittedly, I present in this post a few small improvements to templates and to C++20 in general. Although these improvements may seem not so impressive to you, they make C++20 more consistent and, therefore, less error-prone when you program generic.
By Adrien Hamelin | Aug 5, 2020 09:31 AM | Tags: community
This year, CppCon 2020 is going virtual. The dates are still the same – September 14-18 – and we are aiming for the CppCon live event to have pretty much everything you’re familiar with at CppCon except moved online: multiple tracks including “back to basics” and a new “embedded” track; live speaker Q&A; live talk time zones friendly to Americas and EMEA (and we’re going to try to arrange around-the-clock recorded repeats in all time zones, where speakers who are available can be available for live Q&A in their repeated talks too, and we’ll do that if it’s possible – but we’re still working on it!); virtual tables where you can interact face-to-face online with other attendees just like at the physical event; virtual exhibitor spaces where you can meet the folks on your favorite product’s teams to ask them question face-to-face; pre- and post-conference classes; and even the CppCon house band playing live before every plenary session. All talk recordings will be freely available as usual on YouTube a month or two after the event, but everything else above will be available only live during CppCon week.
To whet your appetite for this year’s conference, here’s another of the top-rated talks from last year. Enjoy – and register today for CppCon 2020 – all the spirit and flavor of CppCon, this year all virtual and online!
Everyday Efficiency: In-Place Construction (Back to Basics?)
by Ben Deane
Summary of the talk:
Efficient C++ has always been about minimizing copies. This practically-focused
talk is about how to do that when working with move semantics, perfect
forwarding and STL containers, or non-STL containers that present similar
interfaces.In-place construction is an easily stated goal, but can be really fiddly to get
right, especially given the foibles of various container interfaces. We'll talk
about copy elision; when to use emplace, insert, or other methods; vectors,
maps, optionals, variants; and how things change from C++11 through C++20.
Attendees will learn why in-place construction is beneficial and exactly how to
achieve optimal efficiency with the various standard container types.
By Meeting C++ | Aug 4, 2020 08:06 AM | Tags: meetingcpp intermediate community c++20 c++17 c++11 basics
The programme of Meeting C++ 2020 has been released today!
Meeting C++ 2020 programme & online tickets available!
by Jens Weller
From the article:
Two Sundays ago the voting on this years submissions ended, and with today I'm able to share the talks for Meeting C++ 2020 with you!
By Adrien Hamelin | Aug 3, 2020 11:29 AM | Tags: community
This year, CppCon 2020 is going virtual. The dates are still the same – September 14-18 – and we are aiming for the CppCon live event to have pretty much everything you’re familiar with at CppCon except moved online: multiple tracks including “back to basics” and a new “embedded” track; live speaker Q&A; live talk time zones friendly to Americas and EMEA (and we’re going to try to arrange around-the-clock recorded repeats in all time zones, where speakers who are available can be available for live Q&A in their repeated talks too, and we’ll do that if it’s possible – but we’re still working on it!); virtual tables where you can interact face-to-face online with other attendees just like at the physical event; virtual exhibitor spaces where you can meet the folks on your favorite product’s teams to ask them question face-to-face; pre- and post-conference classes; and even the CppCon house band playing live before every plenary session. All talk recordings will be freely available as usual on YouTube a month or two after the event, but everything else above will be available only live during CppCon week.
To whet your appetite for this year’s conference, here’s another of the top-rated talks from last year. Enjoy – and register today for CppCon 2020 – all the spirit and flavor of CppCon, this year all virtual and online!
10 Techniques to Understand Existing Code
by Jonathan Boccara
Summary of the talk:
One of the reasons why a lot of us work in C++ is because there is a huge amount of existing projects written in C++.
But existing code can be hard to understand.
In this presentation, you will learn how to make sense of code quickly, from the general big picture of the codebase all the way down to the little details of the code of a complex class.
The ten rules covered in this session will teach you to:
- start reading code from the end
- identify the parts of code that carry the most information
- locate the code of any feature visible in the application
- and many more!Code reading techniques usually come with years and years of experience. This presentation will teach some of them to you right now, supported by code examples.
There is a wealth of talks about how to write C++ code using the latest features of the language, but there are very few talks about reading existing code. In particular the everyday code that people have in their codebases. And as the saying goes, code is read much more often than it is written.
This presentation aims at filling this need in a practical way, by exposing 10 techniques that conferences attendees can use on an everyday basis to understand quickly the code they get to work on, as soon as they go back to the office after the conference.
By Adrien Hamelin | Aug 3, 2020 11:25 AM | Tags: community c++20
Will you use it?
See My Talk: Empty Base Class Optimisation, [[no_unique_address]] and other C++20 Attributes
by Bartlomiej Filipek
Summary of the talk:
Sometime in 2016, I wrote an article about custom deleters for smart pointers.
Bartek’s coding blog: Custom Deleters for C++ Smart Pointers
And there is an interesting property that if you have a unique_ptr and you provide a stateless functor, then the size of unique_ptr is just one pointer (not two when you use a function pointer). But at that time, I didn’t investigate what the exact reason behind this capability was.
Then in February 2020, I gave a presentation on our C++ User Group about all of the C++20 features. And among them, there’s a new attribute called [[no_unique_address]]. At that time, I also had no clear idea of what were the use cases for it.
But then I wanted to understand more of C++20 and somehow those two features: deleters for unique_ptr and [[no_unique_address]] started to “converge”.
As it appears with the new attribute from C++20, we can significantly simplify the code that leverages Empty Base Class Optimisation to create things like “compressed pairs” often used to store stateless callable objects like allocators or deleters.
By Adrien Hamelin | Aug 3, 2020 11:23 AM | Tags: community
An interesting read.
Thirty Years C++. Interview with Bjarne Stroustrup
by Roberto V. Zicari
From the article:
“If you keep your good ideas to yourself, they are useless; you could just as well have been doing crossword puzzles. Only by articulating your ideas and making them accessible through writing and talks do they become a contribution.” –Bjarne Stroustrup
Back in 2007 I had the pleasure to interview Bjarne Stroustrup, the inventor of C++ programming language. Thirteen years later…, I still have the pleasure to publish an interview with Bjarne...
By Blog Staff | Aug 3, 2020 10:19 AM | Tags: None
Just a reminder, early bird registration for the all-virtual CppCon 2020 ends in two days. Register soon to get the reduced rate for you and your team members! After August 5th, registrations will still be available at the regular rate.
CppCon 2020 will be held as an online conference. Registered attendees will get the full experience:
As always, the talk videos will be made freely available to everyone online about a month or two after the event. The other parts of the conference are not recorded, but are available live.
By Adrien Hamelin | Jul 31, 2020 08:00 PM | Tags: community
This year, CppCon 2020 is going virtual. The dates are still the same – September 14-18 – and we are aiming for the CppCon live event to have pretty much everything you’re familiar with at CppCon except moved online: multiple tracks including “back to basics” and a new “embedded” track; live speaker Q&A; live talk time zones friendly to Americas and EMEA (and we’re going to try to arrange around-the-clock recorded repeats in all time zones, where speakers who are available can be available for live Q&A in their repeated talks too, and we’ll do that if it’s possible – but we’re still working on it!); virtual tables where you can interact face-to-face online with other attendees just like at the physical event; virtual exhibitor spaces where you can meet the folks on your favorite product’s teams to ask them question face-to-face; pre- and post-conference classes; and even the CppCon house band playing live before every plenary session. All talk recordings will be freely available as usual on YouTube a month or two after the event, but everything else above will be available only live during CppCon week.
To whet your appetite for this year’s conference, here’s another of the top-rated talks from last year. Enjoy – and register today for CppCon 2020 – all the spirit and flavor of CppCon, this year all virtual and online!
Naming is Hard: Let's Do Better
by Kate Gregory
Summary of the talk:
C++ developers are famously bad at naming: our idioms, guidelines, and lore are rich in examples of terrible names. For example, consider RAII, which stands for scope bound resource management, or west const which perhaps should be const west, or all the samples that feature an object called x which is an instance of a class called X, and so on.
The good news is that naming well is a learned skill, and you can learn it, and start to name better right away. In this talk, I'll tell you why names matter, what benefits a good name can bring, and how to be better at naming. I'll discuss some categories of names and some common decisions within those categories. I'm not going to give you a set of rules to follow: this is about thinking and considering the meaning of the things you are naming. I will give you some questions to ask yourself and some structure that I use to help me to help those who read what I write.
I'll also address renaming things in existing (legacy) code, why and when to do it, and why getting it right the first time may not even be a realistic goal. You should be a lot more confident naming things after we spend this time together.
By Anastasia Kazakova | Jul 30, 2020 12:26 PM | Tags: None
CLion 2020.2 is released!
CLion 2020.2: Makefile Projects, C++20, Enhanced Code analysis, Doctest, and Other Unit Testing Support Improvements
by Anastasia Kazakova
From the article:
CLion 2020.2 covers a wider variety of C and C++ projects and makes modern C++ coding easier. Here are the highlights:
- Project models
- Initial support for Makefile projects
- CMake upgrade to 3.17
- C++20 standard compliance
- Code completion for C++20 keywords
- Code completion in designated initializers
- Support for the
explicit(bool)construct in name hints, navigation, and refactorings- Range-based
forloops with theinitstatement are now supported- Code analysis
- A new inspection to constrain a function's result
- Dangling pointer check
- A more accurate Simplify inspection
- Check for a loop condition that is never updated
- New Inspection Widget and new Problems View
- Support for Doctest, and improved integration with Catch2 and Google Test 1.10
- Automatic creation of code coverage profiles
- PlatformIO plugin enhancements
- VCS:
- Git installed in WSL2
- A more helpful GitHub Pull Requests View
- Performance improvements
By Hitesh Kumar | Jul 30, 2020 12:24 PM | Tags: None
Motivation behind reference_wrapper and common use cases.
std::ref and std::reference_wrapper: Common use cases
by Hitesh Kumar
From this article:
An std::reference_wrapper is a copyable and assignable object that emulates a reference. Contrary to its name, it does not wrap a reference. It works by encapsulating a pointer (T*) and by implicitly converting to a reference (T&). It cannot be default constructed or initialized with a temporary; therefore, it cannot be null or invalid.