March 23-28, London, UK
By Meeting C++ | Dec 10, 2022 11:38 AM | Tags: meetingcpp intermediate community c++20 basics advanced
The opening keynote of Meeting C++ 2022 is now online!
Belle Views on C++ Ranges, their Details and the Devil - Nico Josuttis - Keynote Meeting C++ 2022
by Nicolai Josuttis
Watch it now
By Jens Maurer | Dec 6, 2022 06:08 AM | Tags: c++11 basics
Lambdas
Modern C++ In-Depth — Lambdas, Part 1
by Phani Adusumilli
From the article
While lambdas do not allow us to write anything we could not have written before their introduction, they greatly improve the ease with which we can write function objects and callbacks.
By Administrator | Dec 5, 2022 05:26 PM | Tags: None
The 2022-12 mailing of new standards papers is now available.
| WG21 Number | Title | Author | Document Date | Mailing Date | Previous Version | Subgroup |
|---|---|---|---|---|---|---|
| P0901R10 | Size feedback in operator new | Chris Kennelly | 2022-11-09 | 2022-12 | P0901R9 | EWG Evolution |
| P1018R18 | C++ Language Evolution status pandemic edition 2022/07–2022/11 | JF Bastien | 2022-11-11 | 2022-12 | P1018R17 | EWG Evolution,All of WG21 |
| P1018R19 | C++ Language Evolution status | JF Bastien | 2022-11-15 | 2022-12 | P1018R18 | EWG Evolution,All of WG21 |
| P1028R4 | SG14 status_code and standard error object | Niall Douglas | 2022-10-28 | 2022-12 | P1028R3 | LEWG Library Evolution |
| P1202R5 | Asymmetric Fences | David Goldblatt | 2022-11-11 | 2022-12 | P1202R4 | LWG Library |
| P1264R2 | Revising the wording of stream input operations | Louis Dionne | 2022-12-04 | 2022-12 | P1264R1 | LWG Library |
| P1478R8 | Byte-wise atomic memcpy | Hans Boehm | 2022-11-14 | 2022-12 | P1478R7 | All of WG21 |
| P1619R2 | Functions for Testing Boundary Conditions on Integer Operations | Lisa Lippincott | 2022-11-08 | 2022-12 | P1619R1 | LEWG Library Evolution |
| P2164R8 | views::enumerate | Corentin Jabot | 2022-11-11 | 2022-12 | P2164R7 | LWG Library |
| P2167R3 | Improved Proposed Wording for LWG 2114 (contextually convertible to bool) | Daniel Krügler | 2022-11-02 | 2022-12 | P2167R2 | LWG Library |
| P2248R7 | Enabling list-initialization for algorithms | Giuseppe D'Angelo | 2022-11-13 | 2022-12 | P2248R6 | SG6 Numerics,SG9 Ranges,LEWG Library Evolution |
| P2396R1 | Concurrency TS 2 fixes | David Goldblatt | 2022-11-10 | 2022-12 | P2396R0 | LWG Library |
| P2434R0 | Nondeterministic pointer provenance | S. Davis Herring | 2022-11-16 | 2022-12 | SG22 Compatability,EWG Evolution | |
| P2539R4 | Should the output of std::print to a terminal be synchronized with the underlying stream? | Victor Zverovich | 2022-11-08 | 2022-12 | P2539R3 | LWG Library |
| P2546R3 | Debugging Support | René Ferdinand Rivera Morell | 2022-11-15 | 2022-12 | P2546R2 | LEWG Library Evolution |
| P2548R2 | copyable_function | Michael Florian Hava | 2022-11-08 | 2022-12 | P2548R1 | LEWG Library Evolution |
| P2548R3 | copyable_function | Michael Florian Hava | 2022-11-11 | 2022-12 | P2548R2 | LEWG Library Evolution |
| P2548R4 | copyable_function | Michael Florian Hava | 2022-11-12 | 2022-12 | P2548R3 | LEWG Library Evolution,LWG Library |
| P2552R1 | On the ignorability of standard attributes | Timur Doumler | 2022-11-15 | 2022-12 | P2552R0 | EWG Evolution,CWG Core |
| P2559R1 | Plan for Concurrency Technical Specification Version 2 | Bryce Adelstein Lelbach | 2022-11-16 | 2022-12 | P2559R0 | LEWG Library Evolution,LWG Library |
| P2564R1 | consteval needs to propagate up | Hal Finkel | 2022-11-10 | 2022-12 | P2564R0 | EWG Evolution |
| P2564R2 | consteval needs to propagate up | Hal Finkel | 2022-11-10 | 2022-12 | P2564R1 | EWG Evolution |
| P2564R3 | consteval needs to propagate up | Barry Revzin | 2022-12-04 | 2022-12 | P2564R2 | CWG Core |
| P2570R1 | Contract predicates that are not predicates | Andrzej Krzemieński | 2022-11-14 | 2022-12 | P2570R0 | SG21 Contracts |
| P2588R2 | Relax std::barrier phase completion step guarantees | Gonzalo Brito | 2022-11-07 | 2022-12 | P2588R1 | LEWG Library Evolution |
| P2589R1 | static operator[] | Nevin Liber | 2022-11-10 | 2022-12 | P2589R0 | CWG Core |
| P2602R2 | Poison Pills are Too Toxic | Barry Revzin | 2022-11-07 | 2022-12 | P2602R1 | LEWG Library Evolution |
| P2614R2 | Deprecate numeric_limits::has_denorm | Matthias Kretz | 2022-11-08 | 2022-12 | P2614R1 | LWG Library |
| P2615R1 | Meaningful exports | S. Davis Herring | 2022-11-15 | 2022-12 | P2615R0 | EWG Evolution,CWG Core |
| P2616R1 | Making std::atomic notification/wait operations usable in more situations | Lewis Baker | 2022-11-09 | 2022-12 | P2616R0 | SG1 Concurrency and Parallelism |
| P2616R2 | Making std::atomic notification/wait operations usable in more situations | Lewis Baker | 2022-11-15 | 2022-12 | P2616R1 | SG1 Concurrency and Parallelism |
| P2640R2 | Modules: Inner-scope Namespace Entities: Exported or Not? | Nathan Sidwell | 2022-11-15 | 2022-12 | P2640R1 | EWG Evolution |
| P2644R1 | Final Fix of Broken Range based for Loop Rev 1 | Nicolai Josuttis | 2022-11-13 | 2022-12 | P2644R0 | CWG Core |
| P2647R1 | Permitting static constexpr variables in constexpr functions | Barry Revzin | 2022-11-08 | 2022-12 | P2647R0 | EWG Evolution |
| P2649R0 | 2022-10 Library Evolution Poll Outcomes | Bryce Adelstein Lelbach | 2022-11-11 | 2022-12 | LEWG Library Evolution | |
| P2650R0 | 2022-11 Library Evolution Polls | Bryce Adelstein Lelbach | 2022-11-17 | 2022-12 | LEWG Library Evolution | |
| P2652R1 | Disallow user specialization of allocator_traits | Pablo Halpern | 2022-11-11 | 2022-12 | P2652R0 | LWG Library |
| P2653R1 | Update Annex E based on Unicode 15.0 UAX 31 | Steve Downey | 2022-10-20 | 2022-12 | P2653R0 | SG16 Unicode,CWG Core |
| P2655R1 | common_reference_t of reference_wrapper Should Be a Reference Type | Hui Xie | 2022-11-11 | 2022-12 | P2655R0 | SG9 Ranges,LEWG Library Evolution |
| P2657R1 | C++ is the next C++ | Jarrad J. Waterloo | 2022-11-14 | 2022-12 | P2657R0 | EWG Evolution |
| P2658R1 | temporary storage class specifiers | Jarrad J. Waterloo | 2022-11-14 | 2022-12 | P2658R0 | EWG Evolution |
| P2659R1 | A Proposal to Publish a Technical Specification for Contracts | Brian Bi | 2022-11-14 | 2022-12 | P2659R0 | SG21 Contracts,EWG Evolution |
| P2664R0 | Proposal to extend std::simd with permutation API | Daniel Towner | 2022-10-21 | 2022-12 | SG1 Concurrency and Parallelism,LEWG Library Evolution,LWG Library,Direction Group | |
| P2674R1 | A trait for implicit lifetime types | Timur Doumler | 2022-11-11 | 2022-12 | P2674R0 | CWG Core,LWG Library |
| P2679R1 | Fixing std::start_lifetime_as and std::start_lifetime_as_array | Timur Doumler | 2022-11-11 | 2022-12 | P2679R0 | CWG Core,LWG Library |
| P2681R0 | More Stats Functions | Richard Dosselmann | 2022-11-07 | 2022-12 | SG6 Numerics,SG19 Machine Learning | |
| P2693R0 | Formatting thread::id and stacktrace | Corentin Jabot | 2022-11-11 | 2022-12 | LEWG Library Evolution | |
| P2695R0 | A proposed plan for contracts in C++ | Timur Doumler | 2022-11-17 | 2022-12 | SG21 Contracts,EWG Evolution | |
| P2696R0 | Introduce Cpp17Swappable as additional convenience requirements | Daniel Krügler | 2022-11-07 | 2022-12 | LWG Library | |
| P2697R0 | Interfacing bitset with string_view | Michael Florian Hava | 2022-11-12 | 2022-12 | LEWG Library Evolution | |
| P2698R0 | Unconditional termination is a serious problem | Bjarne Stroustrup | 2022-11-18 | 2022-12 | SG21 Contracts | |
| P2700R0 | Questions on P2680 "Contracts for C++: Prioritizing Safety" | Timur Doumler | 2022-11-29 | 2022-12 | SG21 Contracts | |
| P2701R0 | Translating Linker Input Files to Module Metadata Files | Daniel Ruoso | 2022-11-08 | 2022-12 | SG15 Tooling | |
| P2702R0 | Specifying Importable Headers | Daniel Ruoso | 2022-11-08 | 2022-12 | SG15 Tooling | |
| P2703R0 | C++ Standard Library Ready Issues to be moved in Kona, Nov. 2022 | Jonathan Wakely | 2022-11-07 | 2022-12 | All of WG21 | |
| P2704R0 | C++ Standard Library Immediate Issues to be moved in Kona, Nov. 2022 | Jonathan Wakely | 2022-11-20 | 2022-12 | All of WG21 | |
| P2705R0 | C++ Library Fundamentals TS Issues to be moved in Kona, Nov. 2022 | Jonathan Wakely | 2022-11-07 | 2022-12 | All of WG21 | |
| P2706R0 | Drafting for US 26-061: Redundant specification for defaulted functions | Jason Merrill | 2022-11-08 | 2022-12 | CWG Core | |
| P2708R0 | No Future Fundamentals TSes | Alisdair Meredith | 2022-11-10 | 2022-12 | LEWG Library Evolution | |
| P2708R1 | No Future Fundamentals TSes | Alisdair Meredith | 2022-11-10 | 2022-12 | P2708R0 | LWG Library |
| P2709R0 | Core Language Working Group "ready" Issues for the November, 2022 meeting | Jens Maurer | 2022-11-11 | 2022-12 | All of WG21 | |
| P2710R0 | Core Language Working Group NB comment resolutions for the November, 2022 meeting | Jens Maurer | 2022-11-11 | 2022-12 | All of WG21 | |
| P2711R0 | Making multi-param (and other converting) constructors of views explicit | Ville Voutilainen | 2022-11-09 | 2022-12 | LEWG Library Evolution,LWG Library | |
| P2711R1 | Making multi-param constructors of views explicit | Ville Voutilainen | 2022-11-11 | 2022-12 | P2711R0 | LWG Library |
| P2712R0 | Classification of Contract-Checking Predicates | Joshua Berne | 2022-11-14 | 2022-12 | SG21 Contracts | |
| P2718R0 | Wording for P2644R1 Fix for Range-based for Loop | Joshua Berne | 2022-11-11 | 2022-12 | CWG Core | |
| P2722R0 | Slides: Beyond operator() (P2511R2 presentation) | Zhihao Yuan | 2022-11-12 | 2022-12 | LEWG Library Evolution | |
| P2723R0 | Zero-initialize objects of automatic storage duration | JF Bastien | 2022-11-15 | 2022-12 | SG12 Undefined and Unspecified Behavior,SG22 Compatability,EWG Evolution | |
| P2725R0 | std::integral_constant Literals | Zach Laine | 2022-11-18 | 2022-12 | LEWGI SG18: LEWG Incubator,LEWG Library Evolution | |
| P2726R0 | Better std::tuple Indexing | Zach Laine | 2022-11-18 | 2022-12 | LEWGI SG18: LEWG Incubator,LEWG Library Evolution | |
| P2727R0 | std::iterator_interface | Zach Laine | 2022-11-20 | 2022-12 | LEWGI SG18: LEWG Incubator,LEWG Library Evolution |
By philsquared | Dec 1, 2022 12:45 PM | Tags: None
Whether you're a first-time speaker, or an old pro, we have a place for you at C++ on Sea in 2023. We'd love to hear from all parts of the community, so if you have something to say - please let us know!
The 2023 Call for Speakers opens
From the article:
The call runs until 8th January 2023. If you're reading this at the start of December that might sound like a long way off, yet - but don't be fooled! Due to time dilation caused by the end of year holiday season, it can sneak up much faster than you expect. So don't delay.
By Mike Shah | Dec 1, 2022 12:43 PM | Tags: None
Mike Shah's Modern C++ YouTube series has recently posted the 100th video.
The freely available YouTube series adds 1-2 videos a week on Modern C++ or other related C++ topics.
Modern C++ YouTube Series
by Mike Shah
About the videos
The series can be watched from start to finish, or otherwise as a complement to those studying C++ from a text to learn about specific C++ language features.
By Meeting C++ | Nov 23, 2022 04:08 AM | Tags: performance meetingcpp intermediate community basics
Meeting C++ has begun to publish the first videos from last weeks conference to YouTube:
First 3 talks published
C++ for multi-accelerator, multi-vendor systems - Guy Tamir
Whats new in Conan 2.0 - Christopher McArthur
Living at HEAD with Bazel - Šimon Tóth
By Legalize Adulthood | Nov 21, 2022 09:12 AM | Tags: None
Utah C++ Programmers has released a new video:
Messaging with 0MQ (ZeroMQ)
by Richard Thomson
From the video description:
ZeroMQ (also known as ØMQ, 0MQ, or zmq) looks like an embeddable networking library but acts like a concurrency framework. It gives you sockets that carry atomic messages across various transports like in-process, inter-process, TCP, and multicast. You can connect sockets N-to-N with patterns like fan-out, pub-sub, task distribution, and request-reply. It's fast enough to be the fabric for clustered products. Its asynchronous I/O model gives you scalable multicore applications, built as asynchronous message-processing tasks. It has a score of language APIs and runs on most operating systems.
This month, Richard Thomson will give us an introduction to ZeroMQ. We'll look briefly at the low-level library libzmq before switching to the higher level C++ library zmqpp. We'll adapt a simple database for comic book issues into a CRUD server that responds to zmq messages.
By Blog Staff | Nov 16, 2022 07:37 PM | Tags: None
constexpr keeps getting more and more powerful with each release:
C++ constexpr parlor tricks: How can I obtain the length of a string at compile time?
by Raymond Chen
From the article:
Say you want to obtain, at compile time, the length of a compile-time string constant. The problem is that the strlen function is not constexpr...
By Blog Staff | Nov 16, 2022 07:35 PM | Tags: None
Playing the classics, at arm's length...
The Proxy Pattern
by Rainer Grimm
From the article:
A proxy controls access to another object, allowing you to perform additional operations before or after you access the original object. Sound familiar?
Which idiom is characteristic of C++? Right: RAII (Resource Acquisition Is Initialization). RAII is the C++ way to implement the Proxy Pattern. Here are the facts about the Proxy Pattern. ...
By Blog Staff | Nov 16, 2022 07:27 PM | Tags: None
When having the "last word" makes stuff go faster...
Using final in C++ to improve performance
by Niall Cooling
From the article:
The
finalspecifier was introduced in C++11 to ensure that either a class or a virtual function cannot be further overridden. However, as we shall investigate, this also allows them to perform an optimization known as devirtualization, improving runtime performance.
