By Adrien Hamelin | May 10, 2021 11:28 AM | Tags: basics
A powerful tool.
Templates - First Steps
by Rainer Grimm
From the article:
The idea of this post is quite simple. I want to visualize templates and, in particular, the process of template instantiation. Thanks to C++ Insights, this visualization is pretty easy...
By Adrien Hamelin | May 10, 2021 11:25 AM | Tags: c++20
Are you using it yet?
C++20 Concepts - a Quick Introduction
by Bartlomiej Filipek
From the article:
Concepts are a revolutionary approach for writing templates! They allow you to put constraints on template parameters that improve the readability of code, speed up compilation time, and give better error messages.
Read on and learn how to use them in your code!
By Adrien Hamelin | May 10, 2021 11:23 AM | Tags: c++20
The series continue.
C++ coroutines: Converting among tasks that use the same promise
by Raymond Chen
From the article:
If the only difference between tasks is in the awaiter, then it’s possible to convert between them without the promise even knowing what happened. We have an example of this with our simple_task and com_simple_task, which differ only in the awaiter produced by the co_await operator. This means that we can actually convert between the two by simple wrapping the promise inside the other class...
By Meeting C++ | May 8, 2021 03:45 AM | Tags: meetingcpp community
The monthly overview of upcoming C++ User Group meetings!
Online C++ User Group Meetings in May 2021
by Jens Weller
From the article:
The monthly overview on upcoming C++ User Group meetings. A bit later then usual, seems my talk at C++now and announcing Meeting C++ 2021 has kept me a bit too busy.
Next week Tuesday: Meeting C++ online - May - Design Patterns - Facts and Misconceptions with Klaus Iglberger. If you're interested in this topic, Klaus also gives a training on Modern C++ and Design Patterns in June.
By Adrien Hamelin | May 7, 2021 11:53 AM | Tags: community
Will you attend?
Qt Developer Conference
by Ann Fernandes
From the article:
We at KDAB are pleased to announce an event we’re planning to host in Berlin this fall, September 28-30. Save the dates for KDAB’s Qt Developer Conference — a conference from Qt developers for Qt developers!
By Adrien Hamelin | May 7, 2021 11:52 AM | Tags: c++20
The series continue.
C++ coroutines: Waiting synchronously for our coroutine to complete
by Raymond Chen
From the article:
Last time, we added an extension point that permitted us to respond differently to the completion of the coroutine. We’re going to put that extension point to good use by adding the ability to wait synchronously for the coroutine to complete.
By Adrien Hamelin | May 7, 2021 11:50 AM | Tags: c++20
The series continue.
C++ coroutines: Adding COM context support to our awaiter
by Raymond Chen
From the article:
You may want to have awaiters that apply custom resume behavior. For example, in Windows, you are likely to want your awaiter to preserve the COM thread context. For X11 programming, you may want to the awaiter to return to the render thread if the co_await was initiated from the render thread. Today we’ll add the ability to customize the awaiter to our coroutine promise type...
By Adrien Hamelin | May 7, 2021 11:38 AM | Tags: c++20
The series continue.
C++ coroutines: Snooping in on the coroutine body
by Raymond Chen
From the article:
A coroutine promise can snoop on the coroutine body by implementing a method named await_transform. Any time the coroutine body performs a co_await, the thing being awaited is passed through the await_transform method, and whatever await_transform returns is the thing that is actually awaited. This is the mysterious “We’re not ready to talk about step 1 yet” that kept reappearing in our introduction to awaitable objects...
By Meeting C++ | May 6, 2021 02:16 AM | Tags: meetingcpp conference community
This years Meeting C++ conference has been announced! It will be from Nov 10-12th online.
Announcing Meeting C++ 2021 online conference!
by Jens Weller
From the article:
Finally I can announce the official start of this years conference with the begin of the call for talks and the first batch of tickets available!
Meeting C++ 2021 will be from 10th - 12th November (Wed- Fri) and 100% online. Thats different from last year, when part of the planning always had to keep in mind that a hybrid event might become the "better" format due to venue contracts. This was one of the reasons last years conference was single track. Like every year the conference will run under Berlin Code of Conduct.
By Administrator | Apr 30, 2021 02:01 PM | Tags: None
The 2021-04 mailing of new standards papers is now available.
| WG21 Number | Title | Author | Document Date | Mailing Date | Previous Version | Subgroup |
|---|---|---|---|---|---|---|
| P0323R10 | std::expected | JF Bastien | 2021-04-15 | 2021-04 | P0323R9 | LWG Library |
| P0447R13 | Introduction of std::colony to the standard library | Matt Bentley | 2021-03-24 | 2021-04 | P0447R12 | SG14 Low Latency,LEWG Library Evolution,All of WG21 |
| P1121R3 | Hazard Pointers: Proposed Interface and Wording for Concurrency TS 2 | Maged M. Michael | 2021-04-09 | 2021-04 | P1121R2 | All of WG21 |
| P1122R3 | Proposed Wording for Concurrent Data Structures: Read-Copy-Update (RCU) | Paul E. McKenney | 2021-03-25 | 2021-04 | P1122R2 | LWG Library |
| P1132R7 | out_ptr - a scalable output pointer abstraction | JeanHeyd Meneide | 2021-04-16 | 2021-04 | P1132R6 | LWG Library |
| P1169R1 | static operator() | Barry Revzin | 2021-04-05 | 2021-04 | P1169R0 | EWG Evolution |
| P1401R5 | Narrowing contextual conversions to bool | Andrzej Krzemieński | 2021-04-12 | 2021-04 | P1401R4 | CWG Core |
| P1664R3 | reconstructible_range - a concept for putting ranges back together | JeanHeyd Meneide | 2021-04-16 | 2021-04 | P1664R2 | LEWG Library Evolution |
| P1673R3 | A free function linear algebra interface based on the BLAS | Mark Hoemmen | 2021-04-14 | 2021-04 | P1673R2 | LEWG Library Evolution |
| P1706R3 | Programming Language Vulnerabilities for Safety Critical C++ | Michael Wong | 2021-04-14 | 2021-04 | P1706R2 | SG12 Undefined and Unspecified Behavior |
| P1708R4 | Simple Statistical Functions | Richard Dosselman | 2021-04-14 | 2021-04 | P1708R3 | SG6 Numerics,SG19 Machine Learning,LEWG Library Evolution |
| P1847R4 | Make declaration order layout mandated | Pal Balog | 2021-04-12 | 2021-04 | P1847R3 | CWG Core |
| P1938R3 | if consteval | Barry Revzin | 2021-03-22 | 2021-04 | P1938R2 | EWG Evolution |
| P1949R7 | C++ Identifier Syntax using Unicode Standard Annex 31 | Steve Downey | 2021-04-14 | 2021-04 | P1949R6 | CWG Core |
| P1967R3 | #embed - a simple, scannable preprocessor-based resource acquisition method | JeanHeyd Meneide | 2021-04-15 | 2021-04 | P1967R2 | EWG Evolution |
| P1989R2 | Range constructor for std::string_view 2: Constrain Harder | Corentin Jabot | 2021-03-17 | 2021-04 | P1989R1 | LWG Library |
| P2128R4 | Multidimensional subscript operator | Corentin Jabot | 2021-03-18 | 2021-04 | P2128R3 | EWG Evolution |
| P2128R5 | Multidimensional subscript operator | Corentin Jabot | 2021-04-13 | 2021-04 | P2128R4 | EWG Evolution |
| P2168R2 | generator: A Synchronous Coroutine Generator Compatible With Ranges | Corentin Jabot | 2021-03-22 | 2021-04 | P2168R1 | LEWG Library Evolution |
| P2186R2 | Removing Garbage Collection Support | JF Bastien | 2021-04-16 | 2021-04 | P2186R1 | CWG Core,LWG Library |
| P2201R1 | Mixed string literal concatenation | Jens Maurer | 2021-04-12 | 2021-04 | P2201R0 | CWG Core |
| P2223R2 | Trimming whitespaces before line splicing | Corentin Jabot | 2021-04-13 | 2021-04 | P2223R1 | EWG Evolution,CWG Core |
| P2251R1 | Require span & basic_string_view to be Trivially Copyable | Nevin Liber | 2021-03-19 | 2021-04 | P2251R0 | LEWG Library Evolution |
| P2255R1 | A type trait to detect reference binding to temporary | Tim Song | 2021-04-11 | 2021-04 | P2255R0 | EWG Evolution,LEWG Library Evolution |
| P2265R1 | Renaming any_invocable | Kevlin Henney | 2021-04-17 | 2021-04 | P2265R0 | LEWG Library Evolution |
| P2273R1 | Making std::unique_ptr constexpr | Andreas Fertig | 2021-04-13 | 2021-04 | P2273R0 | LEWG Library Evolution |
| P2283R1 | constexpr for specialized memory algorithms | Michael Schellenberger Costa | 2021-04-18 | 2021-04 | P2283R0 | LEWG Library Evolution |
| P2295R1 | Correct UTF-8 handling during phase 1 of translation | Corentin Jabot | 2021-03-21 | 2021-04 | P2295R0 | SG16 Unicode,SG22 Compatability,EWG Evolution |
| P2295R2 | Support for UTF-8 as a portable source file encoding | Corentin Jabot | 2021-04-13 | 2021-04 | P2295R1 | SG16 Unicode,SG22 Compatability,EWG Evolution |
| P2295R3 | Support for UTF-8 as a portable source file encoding | Corentin Jabot | 2021-04-15 | 2021-04 | P2295R2 | SG16 Unicode,SG22 Compatability,EWG Evolution |
| P2303R2 | Function literals and value closures | Jens Gustedt | 2021-03-29 | 2021-04 | P2303R1 | SG22 Compatability |
| P2304R1 | Improve type generic programming | Jens Gustedt | 2021-03-29 | 2021-04 | P2304R0 | SG22 Compatability |
| P2305R2 | Type inference for variable definitions and function returns | Jens Gustedt | 2021-03-29 | 2021-04 | P2305R1 | SG22 Compatability |
| P2306R1 | Type-generic lambdas | Jens Gustedt | 2021-03-29 | 2021-04 | P2306R0 | SG22 Compatability |
| P2307R1 | Lvalue closures | Jens Gustedt | 2021-03-29 | 2021-04 | P2307R0 | SG22 Compatability |
| P2312R1 | Introduce the nullptr constant | Jens Gustedt | 2021-03-31 | 2021-04 | P2312R0 | SG22 Compatability |
| P2318R1 | A Provenance-aware Memory Object Model for C | Jens Gustedt | 2021-03-24 | 2021-04 | P2318R0 | SG22 Compatability |
| P2321R1 | zip | Tim Song | 2021-04-11 | 2021-04 | P2321R0 | LEWG Library Evolution,LWG Library |
| P2322R2 | ranges::fold | Barry Revzin | 2021-04-14 | 2021-04 | P2322R1 | LEWG Library Evolution |
| P2325R2 | Views should not be required to be default constructible | Barry Revzin | 2021-04-23 | 2021-04 | P2325R1 | LEWG Library Evolution |
| P2327R0 | De-deprecating volatile compound assignment | Paul Bendixen | 2021-04-14 | 2021-04 | SG14 Low Latency,EWG Evolution | |
| P2337R0 | Less constexpr for <cmath> | Nicholas G Timmons | 2021-03-22 | 2021-04 | SG6 Numerics,LEWG Library Evolution | |
| P2342R0 | For a Few Punctuators More | Corentin Jabot | 2021-03-25 | 2021-04 | SG7 Reflection,EWG Evolution | |
| P2345R0 | Relaxing Requirements of Moved-From Objects | Sean Parent | 2021-04-15 | 2021-04 | LEWG Library Evolution,LWG Library | |
| P2348R0 | Whitespaces Wording Revamp | Corentin Jabot | 2021-04-14 | 2021-04 | CWG Core | |
| P2350R0 | constexpr class | Andreas Fertig | 2021-04-13 | 2021-04 | EWG Evolution | |
| P2352R0 | SG16: Unicode meeting summaries 2020-12-09 through 2021-03-24 | Tom Honermann | 2021-04-04 | 2021-04 | SG16 Unicode | |
| P2353R0 | Metaprograms and fragments are needed in comma-separated contexts | David Rector | 2021-04-05 | 2021-04 | SG7 Reflection | |
| P2355R0 | Postfix fold expressions | S. Davis Herring | 2021-04-12 | 2021-04 | EWG Evolution | |
| P2356R0 | Implementing Factory builder on top of P2320 | Matus Chochlik | 2021-04-09 | 2021-04 | SG7 Reflection | |
| P2358R0 | Defining Contracts | Gašper Ažman | 2021-04-15 | 2021-04 | SG21 Contracts | |
| P2360R0 | Extend init-statement to allow alias-declaration | Jens Maurer | 2021-04-13 | 2021-04 | EWG Evolution | |
| P2361R0 | Unevaluated string literals | Corentin Jabot | 2021-04-14 | 2021-04 | SG16 Unicode,EWG Evolution | |
| P2362R0 | Make obfuscating wide character literals ill-formed | Peter Brett | 2021-04-14 | 2021-04 | SG16 Unicode,EWG Evolution | |
| P2363R0 | Extending associative containers with the remaining heterogeneous overloads | Konstantin Boyarinov | 2021-04-15 | 2021-04 | LEWG Library Evolution |