March 18-23, Tokyo, Japan
April 17-20, Bristol, UK
April 24-26, Leganes, Spain
April 30, Online
May 7-12, Aspen, CO, USA
June 24-29, St. Louis, MO, USA
July 2-5, Folkestone, Kent, UK
By Adrien Hamelin | Jul 22, 2022 01:17 PM | Tags: c++23
The future is already coming.
Ranges Improvements with C++23
by Rainer Grimm
From the article:
Thanks to C++23, constructing containers will become more convenient. Additionally, the ranges library got more new views...
By Meeting C++ | Jul 22, 2022 03:00 AM | Tags: qt meetingcpp intermediate c++17 basics
An overview on the issues face when porting my first application to Qt6
Porting my first Application from Qt5 to Qt6
by Jens Weller
From the article:
Just this week I had the opportunity to recompile one of my Qt Applications to build it with Qt6. Here is some of the results.
The application in question manages parts of the conference, and hence is written in Qt for the UI and uses SQLite as datastorage, so Qt also used for this and as I learned for a few other things too...
By Blog Staff | Jul 21, 2022 03:51 PM | Tags: None
The third CppCon 2022 keynote has been announced! Daniela Engert is the world's top guru on C++ modules who isn't one of the compiler implementers, and will speaking about modules and so much more:
Daniela Engert live in person at CppCon 2022
Daniela Engert will be in Aurora, live in person to deliver a keynote that takes us on a journey through modern C++.
Daniela has been building computers and creating software for over forty years, with thirty years in the field of applied digital signal processing. Her recent focus has been on modules and helping developers best understand them and their application in C++20.
Here is her talk description:
Contemporary C++ in Action
This talk is different from typical conference presentations. Instead of focussing on one particular topic I want to take you with me on a journey where I put various pieces from the C++ landscape together into a small application and show how they fit together beautifully. My goal is to debunk the myth that the committee is looking to please experts and library developers instead of making life easier for the many developers in the trenches. This is not slideware, at the end of our tour the code will compile and run with some entertaining result.
On this journey, I will be visiting modules (using modularized popular libraries and others that constitute the app), do some network programming with coroutines (based on ASIO executors, as there are no C++ standard executors yet), slip in one or two of the flagship C++23 features, like explicit object parameters or some of the new library stuff, and season the stew with items from recent C++ standards. It’s a tiny application using techniques that an average programmer in the embedded or industrial world (like me) might find useful. The code I’ll show also contains very tiny fragments of condensed or simplified sources in active development taken from our in-house codebase – old and trusted, but thrust into the modern age.
Registration is now open so don’t miss out on CppCon 2022 this September 11-16. Register today! Tickets are now available for both online attendees and in-person attendees.
By Administrator | Jul 21, 2022 01:40 PM | Tags: None
The 2022-07 mailing of new standards papers is now available.
| WG21 Number | Title | Author | Document Date | Mailing Date | Previous Version | Subgroup |
|---|---|---|---|---|---|---|
| P0009R18 | MDSPAN | Christian Trott | 2022-07-13 | 2022-07 | P0009R17 | All of WG21 |
| P1018R17 | C++ Language Evolution status pandemic edition 2022/06–2022/07 | JF Bastien | 2022-07-09 | 2022-07 | P1018R16 | EWG Evolution,All of WG21 |
| P1083R6 | Move resource_adaptor from Library TS to the C++ WP | Pablo Halpern | 2022-07-08 | 2022-07 | P1083R5 | LEWG Library Evolution |
| P1255R8 | A view of 0 or 1 elements: views::maybe | Steve Downey | 2022-07-11 | 2022-07 | P1255R7 | SG9 Ranges,LEWG Library Evolution |
| P1642R11 | Freestanding Library: Easy [utilities], [ranges], and [iterators] | Ben Craig | 2022-07-01 | 2022-07 | P1642R10 | CWG Core |
| P1684R3 | mdarray: An Owning Multidimensional Array Analog of mdspan | Christian Trott | 2022-07-14 | 2022-07 | P1684R2 | LEWG Library Evolution |
| P1899R3 | stride_view | Christopher Di Bella, Tim Song | 2022-07-10 | 2022-07 | P1899R2 | SG9 Ranges,LEWG Library Evolution |
| P1967R8 | #embed - a simple, scannable preprocessor-based resource acquisition method | JeanHeyd Meneide | 2022-06-28 | 2022-07 | P1967R7 | EWG Evolution |
| P2047R3 | An allocator-aware optional type | Nina Ranns | 2022-07-08 | 2022-07 | P2047R2 | LEWG Library Evolution |
| P2079R3 | System execution context | Lee Howes | 2022-07-15 | 2022-07 | P2079R2 | SG1 Concurrency and Parallelism,LEWG Library Evolution |
| P2165R4 | Compatibility between tuple, pair and tuple-like objects | Corentin Jabot | 2022-07-15 | 2022-07 | P2165R3 | LEWG Library Evolution |
| P2248R5 | Enabling list-initialization for algorithms | Giuseppe D'Angelo | 2022-06-29 | 2022-07 | P2248R4 | SG6 Numerics,SG9 Ranges,LEWG Library Evolution |
| P2295R6 | Support for UTF-8 as a portable source file encoding | Corentin Jabot | 2022-07-01 | 2022-07 | P2295R5 | SG22 Compatability,EWG Evolution |
| P2361R5 | Unevaluated strings | Corentin Jabot | 2022-07-09 | 2022-07 | P2361R4 | EWG Evolution |
| P2374R4 | views::cartesian_product | Sy Brand | 2022-07-13 | 2022-07 | P2374R3 | LWG Library |
| P2404R3 | Move-only types for equality_comparable_with, totally_ordered_with, and three_way_comparable_with | Justin Bassett | 2022-07-08 | 2022-07 | P2404R2 | SG9 Ranges,LEWG Library Evolution,LWG Library |
| P2417R2 | A more constexpr bitset | Daniil Goncharov | 2022-07-16 | 2022-07 | P2417R1 | LWG Library |
| P2419R2 | Clarify handling of encodings in localized formatting of chrono types | Victor Zverovich | 2022-07-15 | 2022-07 | P2419R1 | LWG Library |
| P2460R2 | Relax requirements on wchar_t to match existing practices | Corentin Jabot | 2022-07-15 | 2022-07 | P2460R1 | SG22 Compatability,CWG Core |
| P2474R2 | views::repeat | Michał Dominiak | 2022-07-13 | 2022-07 | P2474R1 | SG9 Ranges,LWG Library |
| P2481R1 | Forwarding reference to specific type/template | Barry Revzin | 2022-07-15 | 2022-07 | P2481R0 | EWG Evolution |
| P2494R2 | Relaxing range adaptors to allow for move only types | Michał Dominiak | 2022-07-13 | 2022-07 | P2494R1 | SG9 Ranges,LWG Library |
| P2513R4 | char8_t Compatibility and Portability Fix | JeanHeyd Meneide | 2022-06-26 | 2022-07 | P2513R3 | EWG Evolution |
| P2547R1 | Language support for customisable functions | Lewis Baker | 2022-07-16 | 2022-07 | P2547R0 | EWG Evolution |
| P2548R0 | copyable_function | Michael Florian Hava | 2022-07-13 | 2022-07 | LEWG Library Evolution | |
| P2549R1 | std::unexpected should have error() as member accessor | Yihe Li | 2022-07-04 | 2022-07 | P2549R0 | LWG Library |
| P2561R0 | operator?? | Barry Revzin | 2022-07-10 | 2022-07 | EWG Evolution | |
| P2579R0 | Mitigation strategies for P2036 "Changing scope for lambda trailing-return-type" | Corentin Jabot | 2022-07-01 | 2022-07 | EWG Evolution,CWG Core | |
| P2585R1 | Improving default container formatting | Barry Revzin | 2022-07-15 | 2022-07 | P2585R0 | LEWG Library Evolution |
| P2587R1 | to_string or not to_string | Victor Zverovich | 2022-06-24 | 2022-07 | P2587R0 | SG16 Unicode |
| P2590R2 | Explicit lifetime management | Timur Doumler | 2022-07-15 | 2022-07 | P2590R1 | CWG Core,LWG Library |
| P2592R1 | Hashing support for std::chrono value classes | Giuseppe D'Angelo | 2022-06-30 | 2022-07 | P2592R0 | LEWG Library Evolution |
| P2601R1 | Make redundant empty angle brackets optional | Justin Cooke | 2022-07-16 | 2022-07 | P2601R0 | EWG Evolution,CWG Core |
| P2602R1 | Poison Pills are Too Toxic | Barry Revzin | 2022-07-11 | 2022-07 | P2602R0 | LEWG Library Evolution |
| P2609R1 | Relaxing Ranges Just A Smidge | John Eivind Helset | 2022-06-29 | 2022-07 | P2609R0 | SG9 Ranges,LEWG Library Evolution |
| P2610R0 | 2022-07 Library Evolution Polls | Bryce Adelstein Lelbach | 2022-06-29 | 2022-07 | LEWG Library Evolution | |
| P2613R1 | Add the missing `empty` to `mdspan` | Yihe Le | 2022-06-29 | 2022-07 | P2613R0 | LEWG Library Evolution |
| P2614R0 | Deprecate numeric_limits::has_denorm | Matthias Kretz | 2022-07-06 | 2022-07 | SG6 Numerics,LEWG Library Evolution | |
| P2615R0 | Meaningful exports | S. Davis Herring | 2022-07-01 | 2022-07 | CWG Core | |
| P2616R0 | Making std::atomic notification/wait operations usable in more situations | Lewis Baker | 2022-07-05 | 2022-07 | SG1 Concurrency and Parallelism | |
| P2617R0 | Responses to NB comments on DTS 12907 "Extensions to C++ for Transactional Memory Version 2" | Jens Maurer | 2022-07-15 | 2022-07 | SG5 Transactional Memory,CWG Core | |
| P2618R0 | C++ Standard Library Issues to be moved in Virtual Plenary, Jul. 2022 | Jonathan Wakely | 2022-07-15 | 2022-07 | All of WG21 | |
| P2620R0 | Lifting artificial restriction on universal character names | Corentin Jabot | 2022-07-09 | 2022-07 | SG16 Unicode,SG22 Compatability,EWG Evolution | |
| P2621R0 | UB? In my Lexer? | Corentin Jabot | 2022-07-09 | 2022-07 | SG22 Compatability,EWG Evolution | |
| P2622R0 | Core Language Working Group "ready" Issues for the July, 2022 meeting | Jens Maurer | 2022-07-15 | 2022-07 | All of WG21 | |
| P2623R0 | implicit constant initialization | Jarrad J. Waterloo | 2022-07-13 | 2022-07 | EWG Evolution | |
| P2624R0 | Make operations on bools more portable | Justin Cooke | 2022-07-16 | 2022-07 | CWG Core |
By Andrey Karpov | Jul 20, 2022 10:43 AM | Tags: sast devsecops cwetop25 cwe25 cwe
The CWE Top 25 list reflects the most serious software security weaknesses. I invite you to read the updated top list to become aware of the changes happened over the past year.
CWE Top 25 2022. Review of changes
by Mikhail Gelvih
From the article:
Below is a table of correspondence between the CWE Top 25 2022 list and the PVS-Studio diagnostic rules, divided by programming languages. You can always check the most up-to-date table with CWE Top 25 coverage on our website.
By Jordi Mon Companys | Jul 20, 2022 01:14 AM | Tags: experimental
An experimental successor to C++
About Carbon:
C++ remains the dominant programming language for performance-critical software, with massive and growing codebases and investments. However, it is struggling to improve and meet developers' needs outlined above, in no small part due to accumulating decades of technical debt. Incrementally improving C++ is extremely difficult, both due to the technical debt itself and challenges with its evolution process. The best way to address these problems is to avoid inheriting the legacy of C or C++ directly, and instead start with solid language foundations like a modern generics system, modular code organization, and consistent, simple syntax.
By Blog Staff | Jul 19, 2022 09:23 AM | Tags: None
CppCon 2022 will kick off on Monday, September 11 with Bjarne Stroustrup delivering the traditional opening keynote live in person in Aurora. Bjarne’s annual opening keynote for CppCon is one of the most anticipated and most watch talks in C++, and among the most viewed presentations on the CppCon YouTube Channel. Registration is open attend in person to be in the room for this keynote, to watch and submit questions live online, or do both...
Opening 2022 Keynote: C++ in Constrained Environments
Bjarne Stroustrup, live in person
C++ is widely used in constrained and/or critical applications and infrastructure components. How do we manage to use a large multi-purpose language in such environments? How can we better use facilities and techniques from modern C++ (C++11, C++14, C++17, C++20, and beyond)? The best answer is not “use only facilities available in C and C++ in 1985.”
This talk focuses on a top-down approach to achieve simplicity, maintainability, performance, and various forms of safety. It touches upon the C++ Core Guidelines, compile-time computation, type-and-resource safety, type deduction, the span and chrono standard libraries, and error handling.
Every year, Bjarne Stroustrup gives an important C++ talk in his CppCon opening keynote. Be at CppCon again this year, on-site or on-line, as Bjarne Stroustrup flies us above this complex landscape of issues and shines a spotlight on the most important things to know, and to think about, in C++ in 2022. This year we aim to leave extra extended time for real-time questions and answers with the live audience. Come to the talk, bring your questions, and don’t miss out!
Registration is now open for both online and in-person attendees so don’t miss out on CppCon 2022 this September 11-16. Register today!
By Blog Staff | Jul 19, 2022 09:23 AM | Tags: None
CppCon 2022 will kick off on Monday, September 11 with Bjarne Stroustrup delivering the traditional opening keynote live in person in Aurora. Bjarne’s annual opening keynote for CppCon is one of the most anticipated and most watch talks in C++, and among the most viewed presentations on the CppCon YouTube Channel. Registration is open attend in person to be in the room for this keynote, to watch and submit questions live online, or do both...
Opening 2022 Keynote: C++ in Constrained Environments
Bjarne Stroustrup, live in person
C++ is widely used in constrained and/or critical applications and infrastructure components. How do we manage to use a large multi-purpose language in such environments? How can we better use facilities and techniques from modern C++ (C++11, C++14, C++17, C++20, and beyond)? The best answer is not “use only facilities available in C and C++ in 1985.”
This talk focuses on a top-down approach to achieve simplicity, maintainability, performance, and various forms of safety. It touches upon the C++ Core Guidelines, compile-time computation, type-and-resource safety, type deduction, the span and chrono standard libraries, and error handling.
Every year, Bjarne Stroustrup gives an important C++ talk in his CppCon opening keynote. Be at CppCon again this year, on-site or on-line, as Bjarne Stroustrup flies us above this complex landscape of issues and shines a spotlight on the most important things to know, and to think about, in C++ in 2022. This year we aim to leave extra extended time for real-time questions and answers with the live audience. Come to the talk, bring your questions, and don’t miss out!
Registration is now open for both online and in-person attendees so don’t miss out on CppCon 2022 this September 11-16. Register today!
By Adrien Hamelin | Jul 18, 2022 08:57 AM | Tags: None
Registration is now open for CppCon 2022, which starts on September 11 and will again be held both in person and online. To whet your appetite for this year’s conference, we’re posting videos of some of the top-rated talks from last year’s conference. Here’s another CppCon talk video we hope you will enjoy – and why not register today for CppCon 2022 to attend in person, online, or both!
Configuration, Extension, Maintainability
by Titus Winters
Summary of the video:
Configurability should be considered a potential design smell, especially for systems and interfaces that will be in use for a long time. As an unfortunate result, “No, please don’t add that feature” must be a viable response to design proposals - just because a change can be made doesn’t mean it should. This is particularly challenging to square with a customer-focused product mindset: it’s hard to balance between long-term needs and immediate “the customer is always right.”
Providing options and toggles to configure settings gives users more freedom, but those settings become stale and brittle almost immediately, and regularly wind up pessimizing overall efficiency results. This is particularly true of rarely-used forms of extensibility and configuration. Of course, whatever sort of optionality and customization you provide will be hard to ever undo, because of Hyrum’s Law.
At the root of it, there is a fundamental tension between customization, extensibility, configuration vs. centralization, efficiency, and evolvability, and this tension needs to be considered when you are evaluating whether to add new customization and extensibility options. This talk will address some of the basic ways that design and invariants interact with long-term maintenance and optimization, and some heuristics for deciding whether adding a knob will turn out to be a mistake.
By Adrien Hamelin | Jul 18, 2022 08:56 AM | Tags: c++20
The series continue.
Improved Iterators with Ranges
by Rainer Grimm
From the article:
There are more reasons to prefer ranges library above the classical Standard Template Library. The ranges iterators support unified lookup rules and provide additional safety guarantees...