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 | Apr 29, 2022 08:50 AM | Tags: c++20
Correct time tables.
Local Time
by Andrzej Krzemieński
From the article:
In this post we will see how to solve the task from the previous post, but display the time point in local time instead of system time. The solution is simple and takes only two additional lines (you can scroll down towards the end), but I want to take this opportunity to offer some reflections about the concepts of time zones and daylight saving time...
By Adrien Hamelin | Apr 29, 2022 08:49 AM | Tags: c++20
The series continue.
Defining Concepts with Requires Expressions
by Rainer Grimm
From the article:
In my last post "Define Concepts", I defined the concepts Integral, SignedIntegral, and UnsigendIntegral using logical combinations of existing concepts and compile-time predicates. Today, I use Requires Expressions to define concepts...
By Adrien Hamelin | Apr 27, 2022 08:31 AM | Tags: c++20
Are you using them?
C++20 Ranges Algorithms - 7 Non-modifying Operations
by Bartlomiej Filipek
From the article:
C++20’s Ranges offer alternatives for most of <algorithm>'s'. This time I’d like to show you ten non-modifying operations. We’ll compare them with the “old” standard version and see their benefits and limitations.
Let’s go...
By Adrien Hamelin | Apr 27, 2022 08:26 AM | Tags: experimental c++20
Time to update.
New C++ features in GCC 12
by Marek Polacek
From the article:
Version 12.1 of the GNU Compiler Collection (GCC) is expected to be released in April 2022. Like every major GCC release, this version will bring many additions, improvements, bug fixes, and new features. GCC 12 is already the system compiler in Fedora 36. GCC 12 will also be available on Red Hat Enterprise Linux in the Red Hat Developer Toolset (version 7) or the Red Hat GCC Toolset (version 8 and 9).
Like the article I wrote about GCC 10, this article describes only new features affecting C++.
We implemented several C++23 proposals in GCC 12. The default dialect in GCC 12 is -std=gnu++17; to enable C++23 features, use the -std=c++23 or -std=gnu++23 command-line options. (The latter option allows GNU extensions.)
Note that C++20 and C++23 features are still experimental in GCC 12...
By Adrien Hamelin | Apr 27, 2022 08:25 AM | Tags: community
The series continue.
Policy
by Rainer Grimm
From the article:
Thanks to templates, there are new ways of software design. Policies and traits are two commonly used idioms in C++.
By Meeting C++ | Apr 26, 2022 01:50 AM | Tags: meetingcpp community
Meeting C++ 2022 will be a hybrid event from Berlin in November this year. Nicolai Josuttis will give the opening keynote and the closing keynote will be by Klaus Iglberger!
Announcing the first two keynotes for Meeting C++ 2022
by Jens Weller
From the article:
Happy to announce the opening and closing keynotes for Meeting C++ 2022!
This years Meeting C++ conference is the 10 year anniversary of Meeting C++ it self. There is of course is a long list of keynote speakers that have or might keynote Meeting C++ in the future. From that long list of possiblities I've chosen Nicolai Josuttis and Klaus Iglberger.
By Adrien Hamelin | Apr 25, 2022 12:39 PM | Tags: community
The new Overload is out.
In the journal:
On Becoming Unstuck
By Frances Buontempo
The horsemen of the apocalypse may be on the horizon. Frances Buontempo attempts to stop doom-scrolling and solve problems instead.Taming Wordle with the Command Line
By James Handley
Could static analysis provide a generic way to approach Wordle? James Handley uses simple command line tools in order to (hopefully) name that Wordle in four!C++20: A Coroutine Based Stream Parser
By Andreas Fertig
Stream parsing code can be very complicated. Andreas Fertig uses coroutines to make stream parsing code clearer.Structured Concurrency in C++
By Lucian Radu Teodorescu
Raw threads tend to be unstructured. Lucian Radu Teodorescu applies principles from Structured Programming to concurrency.The Vector Refactored
By Teedy Deigh
Finding the right level of abstraction can be challenging. Teedy Deigh razes the level of abstraction.
By Adrien Hamelin | Apr 25, 2022 12:36 PM | Tags: None
The series continue.
Type Erasure
by Rainer Grimm
From the article:
Type erasure based on templates is a pretty sophisticated technique. It allows you to bridge dynamic polymorphism (object orientation) with static polymorphism (templates).
By Adrien Hamelin | Apr 25, 2022 12:35 PM | Tags: None
The series continue.
Define Concepts
by Rainer Grimm
From the article:
There are two ways to define a concept: You can combine existing concepts and compile-time predicates, or you can apply a requires expression in four different ways...
By Administrator | Apr 25, 2022 08:06 AM | Tags: None
The 2022-04 mailing of new standards papers is now available.
| WG21 Number | Title | Author | Document Date | Mailing Date | Previous Version | Subgroup |
|---|---|---|---|---|---|---|
| P0429R8 | A Standard flat_map | Zach Laine | 2022-04-18 | 2022-04 | P0429R7 | LWG Library |
| P0957R7 | Proxy: A Polymorphic Programming Library | Mingxin Wang | 2022-04-19 | 2022-04 | P0957R6 | LEWGI SG18: LEWG Incubator,LEWG Library Evolution |
| P1061R2 | Structured Bindings can introduce a Pack | Barry Revzin | 2022-04-22 | 2022-04 | P1061R1 | EWG Evolution |
| P1169R4 | static operator() | Barry Revzin | 2022-04-10 | 2022-04 | P1169R3 | CWG Core |
| P1222R3 | A Standard flat_set | Zach Laine | 2022-04-18 | 2022-04 | P1222R2 | LWG Library |
| P1223R4 | find_last | Zach Laine | 2022-04-15 | 2022-04 | P1223R3 | LEWG Library Evolution,LWG Library |
| P1467R9 | Extended floating-point types and standard names | David Olsen | 2022-04-22 | 2022-04 | P1467R8 | CWG Core,LWG Library |
| P1642R8 | Freestanding Library: Easy [utilities], [ranges], and [iterators] | Ben Craig | 2022-04-13 | 2022-04 | P1642R7 | LWG Library |
| P1673R7 | A free function linear algebra interface based on the BLAS | Mark Hoemmen | 2022-04-14 | 2022-04 | P1673R6 | LEWG Library Evolution |
| P1674R1 | Evolving a Standard C++ Linear Algebra Library from the BLAS | Mark Hoemmen | 2022-04-14 | 2022-04 | P1674R0 | LEWG Library Evolution |
| P1684R2 | mdarray: An Owning Multidimensional Array Analog of mdspan | Christian Trott | 2022-04-24 | 2022-04 | P1684R1 | LEWG Library Evolution |
| P1967R5 | #embed - a simple, scannable preprocessor-based resource acquisition method | JeanHeyd Meneide | 2022-04-13 | 2022-04 | P1967R4 | EWG Evolution |
| P2071R2 | Named universal character escapes | Tom Honermann | 2022-03-27 | 2022-04 | P2071R1 | CWG Core |
| P2093R14 | Formatted output | Victor Zverovich | 2022-03-25 | 2022-04 | P2093R13 | LWG Library |
| P2174R1 | Compound Literals | Zhihao Yuan | 2022-04-15 | 2022-04 | P2174R0 | EWG Evolution |
| P2198R5 | Freestanding Feature-Test Macros and Implementation-Defined Extensions | Ben Craig | 2022-04-13 | 2022-04 | P2198R4 | LWG Library |
| P2266R3 | Simpler implicit move | Arthur O'Dwyer | 2022-03-26 | 2022-04 | P2266R2 | CWG Core |
| P2278R3 | cbegin should always return a constant iterator | Barry Revzin | 2022-04-11 | 2022-04 | P2278R2 | LEWG Library Evolution |
| P2280R4 | Using unknown references in constant expressions | Barry Revzin | 2022-04-10 | 2022-04 | P2280R3 | CWG Core |
| P2286R7 | Formatting Ranges | Barry Revzin | 2022-04-22 | 2022-04 | P2286R6 | LEWG Library Evolution |
| P2300R5 | `std::execution` | Michał Dominiak | 2022-04-22 | 2022-04 | P2300R4 | SG1 Concurrency and Parallelism,LEWG Library Evolution |
| P2302R4 | std::ranges::contains | Christopher Di Bella | 2022-04-16 | 2022-04 | P2302R3 | All of WG21 |
| P2305R5 | Type inference for object definitions | Jens Gustedt | 2022-04-08 | 2022-04 | P2305R4 | SG22 Compatability |
| P2322R6 | ranges::fold | Barry Revzin | 2022-04-22 | 2022-04 | P2322R5 | LEWG Library Evolution |
| P2400R3 | Library Evolution Report: 2021-09-28 to 2022-01-25 | Bryce Adelstein Lelbach | 2022-04-21 | 2022-04 | P2400R2 | All of WG21 |
| P2408R5 | Ranges iterators as inputs to non-Ranges algorithms | David Olsen | 2022-04-22 | 2022-04 | P2408R4 | LWG Library |
| P2472R2 | make function_ref more functional | Jarrad J. Waterloo | 2022-04-14 | 2022-04 | P2472R1 | LEWG Library Evolution |
| P2505R2 | Monadic Functions for std::expected | Jeff Garland | 2022-04-15 | 2022-04 | P2505R1 | LEWG Library Evolution,LWG Library |
| P2510R2 | Formatting pointers | Mark de Wever | 2022-04-14 | 2022-04 | P2510R1 | LWG Library |
| P2538R1 | ADL-proof std::projected | Arthur O'Dwyer | 2022-04-01 | 2022-04 | P2538R0 | LEWG Library Evolution,LWG Library |
| P2539R1 | Should the output of std::print to a terminal be synchronized with the underlying stream? | Victor Zverovich | 2022-04-11 | 2022-04 | P2539R0 | LEWG Library Evolution |
| P2542R1 | views::concat | Hui Xie | 2022-03-28 | 2022-04 | P2542R0 | SG9 Ranges,LEWG Library Evolution |
| P2546R1 | Debugging Support | René Ferdinand Rivera Morell | 2022-04-10 | 2022-04 | P2546R0 | LEWG Library Evolution |
| P2559R0 | Plan for Concurrency Technical Specification Version 2 | Bryce Adelstein Lelbach | 2022-04-01 | 2022-04 | SG1 Concurrency and Parallelism,EWG Evolution,LEWG Library Evolution | |
| P2573R0 | = delete("should have a reason"); | Yihe Li | 2022-04-14 | 2022-04 | EWGI SG17: EWG Incubator,EWG Evolution | |
| P2574R0 | 2022-05 Library Evolution Polls | Bryce Adelstein Lelbach | 2022-04-22 | 2022-04 | LEWG Library Evolution | |
| P2576R0 | The constexpr specifier for object definitions | Jens Gustedt | 2022-04-08 | 2022-04 | SG22 Compatability | |
| P2577R0 | C++ Modules Discovery in Prebuilt Library Releases | Daniel Ruoso | 2022-04-11 | 2022-04 | SG15 Tooling |