By Blog Staff | Oct 5, 2022 01:57 PM | Tags: None
Worth waiting for:
The gotcha of the C++ temporaries that don’t destruct as eagerly as you thought
by Raymond Chen
From the article:
Forgetting to take a lock when updating variables is a common mistake. One way to make the mistake harder to make is to force the access to occur through some mechanism that proves that you possess the lock. Maybe something like this: ...
By Blog Staff | Oct 4, 2022 03:56 PM | Tags: None
Why do now what you can do later (or not at all)?
Deferred argument evaluation
by Joaquín M López Muñoz
From the article:
Ideally, we'd like for
try_emplaceto not create the object except when really needed. What we're effectively asking for is some sort of technique for deferred argument evaluation. As it happens, it is very easy to devise our own: ...
By Blog Staff | Oct 4, 2022 03:52 PM | Tags: None
Have you used the patterns?
The Singleton: The Alternatives Monostate Pattern and Dependency Injection
by Rainer Grimm
From the article:
So far, I have discussed in my previous posts the Singleton Pattern, and its pros and cons. One question is still open: What alternatives for the Singleton Pattern are available? Today, I write about the Monostate Pattern and Dependency Injection...
By Blog Staff | Oct 4, 2022 03:49 PM | Tags: None
One if by latch, two if by barrier:
C++20 Concurrency: Barrier
by Gajendra Gulgulia
From the article:
In this article, I’ll present a simple example of
std::barrierby means of game players playing a hypothetical card game and go into the details of the api ofstd::barrierin another article...
By Meeting C++ | Oct 1, 2022 06:46 AM | Tags: meetingcpp community
The monthly listing on Meeting C++ about upcoming C++ User Group meetings:
Upcoming C++ User Group meetings in October 2022
by Jens Weller
From the article:
This month Meeting C++ online hosts some special events:
Meeting C++ online job fair:
The Meetings
4.10 C++ UG Meeting C++ online - Online C++ job fair (afternoon CEST)
5.10 C++ UG Meeting C++ online - Online C++ job fair (evening CEST)
20.10 C++ UG Meeting C++ online - October - AMA with Nicolai Josuttis
25.10 C++ UG Meeting C++ online - Meeting C++ online book & tool fair
With Bjarne Stroustrup and Klaus Iglberger
...
By Andrey Karpov | Sep 27, 2022 04:01 AM | Tags: podcast jason turner cppcast
In this article, we are going to talk to Jason Turner, one of the CppCast founders. From 2015 to 2022 CppCast had weekly conversations with C++ conference speakers, library authors, writers, ISO committee members, and more. Keep reading to learn about the CppCast backstory.
A talk with Jason Turner: the history of CppCast, and why it was shut down
by Uliana Grishina
From the article:
Hello, Jason! I'm sure our readers know what CppCast is and have come here to learn its story and fate. Before we begin, we'd like to hear more about you and what you're doing now. Chances are even regular CppCast listeners may know you just as "Jason, the podcast host."
. So, could you tell us more about yourself? What do you do now and what did you do before you decide to stop CppCast?
By Vittorio Romeo | Sep 25, 2022 10:56 PM | Tags: None
In this article, we’ll explore how C++’s abstraction model heavily relies on compiler optimizations, unveiling some unfortunate examples of unexpected performance loss. Afterwards, we will compare how the three major compilers (GCC, Clang, and MSVC) fare in this area, and we’ll discuss some potential future improvements or workarounds.
the sad state of debug performance in c++
by Vittorio Romeo
From the article:
C++ developers should know that `std::move(0)` is semantically the same as `static_cast<int&&>(0)`, and most of them would expect the compiler to generate no code for the move, even with optimizations disabled. Turns out that GCC 12.2, Clang 14.0, and MSVC v19.x all end up generating a call instruction. [...]
By Blog Staff | Sep 25, 2022 12:28 PM | Tags: None
Are you using concepts?
Static, Dynamic Polymorphism, CRTP and C++20’s Concepts
by Thomas Sedlmair
From the article:
Let's talk about Polymorphism, CRTP as a way to use static polymorphism and how C++20 can change the way how we write code...
By Blog Staff | Sep 25, 2022 12:23 PM | Tags: None
Do you know about std::ssize()?
Reducing Signed and Unsigned Mismatches with std::ssize()
by Bartlomiej Filipek
From the article:
In this article, I’ll show another technique that avoids mixing signed and unsigned types.
In my article Integer Conversions and Safe Comparisons in C++20 we learned about
cmp_*integer comparison functions that allow us to compare various types of integer types. The functions are safe because they help with mixing signed and unsigned types. In C++20, there’s another handy feature: the non-memberstd::ssize()function that returns a signed number of elements in a container.Let’s see how to use it...
By Blog Staff | Sep 19, 2022 03:47 PM | Tags: None
Speaking of std::ssize...
std::ssize() in C++20
by Bartlomiej Filipek
From the article:
In this article, I’ll show another technique that avoids mixing signed and unsigned types.
In my article Integer Conversions and Safe Comparisons in C++20 we learned about
cmp_*integer comparison functions that allow us to compare various types of integer types. The functions are safe because they help with mixing signed and unsigned types. In C++20, there’s another handy feature: the non-memberstd::ssize()function that returns a signed number of elements in a container.Let’s see how to use it. ...