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By Blog Staff | Feb 8, 2021 07:03 PM | Tags: None
Solution just posted:
GotW #99 Solution: Postconditions
by Herb Sutter
From the article:
Postconditions are directly related to assertions (see GotW #97)... but how, exactly? And since we can already write postconditions using assertions, why would having language support benefit us more for writing postconditions more than for writing (ordinary) assertions?
By Adrien Hamelin | Feb 8, 2021 02:02 PM | Tags: advanced
Lambda magic.
How std::any Works
by Jonathan Boccara
From the article:
In the previous post we’ve seen a very nice technique to use value semantics with inheritance and virtual methods, which was made possible by std::any.
Given its usefulness, it would be interesting to better understand std::any. Indeed, std::any is sometimes said to be “the modern void*“. But it does much more than a void*...
By Adrien Hamelin | Feb 8, 2021 01:58 PM | Tags: c++20
New possibilities.
Abbreviated Function Templates and Constrained Auto
by Sy Brand
From the article:
Declaring function templates in C++ has always been quite verbose. C++20 added a new way of doing so that is more terse and more consistent with lambdas: abbreviated function templates. This short post will show how to use this syntax and how it applies to C++20 concepts...
By Adrien Hamelin | Feb 8, 2021 01:44 PM | Tags: intermediate c++20
Many ways.
12 Different Ways to Filter Containers in Modern C++
by Bartlomiej Filipek
From the article:
Do you know how many ways we can implement a filter function in C++?
While the problem is relatively easy to understand - take a container, copy elements that match a predicate and the return a new container - it’s good to exercise with the Standard Library and check a few ideas. We can also apply some Modern C++ techniques.
Let’s start!
By Meeting C++ | Feb 5, 2021 08:08 AM | Tags: meetingcpp community c++17 c++14 c++11 basics
Its now 6 years since Meeting C++ publishes a weekly blogroll for C++!
6 years of Meeting C++ Blogrolls
by Jens Weller
From the article:
Today 6 years ago the first weekly blogroll of Meeting C++ was released.
Since then it has been released on (most) Fridays, giving you a weekly overview of what happend in the C++ Blog scene and Videos in the past 7 days. Since last year...
By Andrzej Krzemienski | Feb 4, 2021 12:24 PM | Tags: None
"Contract support" is one of the things actively developed for C++.
Contracts, Preconditions & Invariants
By Andrzej Krzemienski
About the article
This blog post is an introductory material, demonstrating what a contract is, how preconditions and invariants can be derived from the contract, and how this process can help detect bugs. Two points stressed in this post are: (1) preconditions and invariants are not “contracts” and (2) only a subset of contract-related bugs can be detected through preconditions and invariants.
By Adrien Hamelin | Feb 2, 2021 02:47 PM | Tags: c++20
More tools for concurency safety.
Barriers and Atomic Smart Pointers in C++20
by Rainer Grimm
From the article:
In my last post, I introduced latches in C++20. A latch enables it threads to wait until a counter becomes zero. Additionally, to a latch, its big sibling barrier can be used more than once. Today, I write about barriers and present atomic smart pointers...
By Adrien Hamelin | Feb 2, 2021 02:37 PM | Tags: c++20
Making our lives easier.
std::jthread and cooperative cancellation with stop token
by Hitesh Kumar
From the article:
A std::jthread instance represents an automatically joining and cooperatively cancellable thread. std::jthread has an exception-safe thread termination flow compared to std::thread and can replace it in most situations with little or no code changes...
By Adrien Hamelin | Feb 2, 2021 02:29 PM | Tags: intermediate
What do you think?
Inheritance Without Pointers
by Jonathan Boccara
From the article:
Inheritance is a useful but controversial technique in C++. There is even a famous talk by Sean Parent called Inheritance is the base class of evil. So inheritance is not the most popular feature of the C++ community.
Nevertheless, inheritance is useful, and widely used by C++ developers.
What is the problem of inheritance? It has several problems, and one of them is that it forces us to manipulate objects through pointers...
By Meeting C++ | Feb 1, 2021 11:43 AM | Tags: meetingcpp community
THe monthly overview on upcoming User Group Meetings:
Online C++ User Group Meetings in February 2021
by Jens Weller
From the article:
The monthly overview of upcoming online C++ User Group meetings.
Tomorrow my Meeting C++ online Group meets to have a chat about C++ in Production! 17:00 CET!