By Adrien Hamelin | Feb 12, 2020 02:59 PM | Tags: basics
How do you do it?
Reverse For Loops in C++
by Carlos Buchart
From the article:
As we saw when working on dynamic bitsets, it can be useful to traverse a collection backwards, from its last element to its first one.
It would be nice to be able to use C++11 range for loops to iterate backwards. But unfortunately, there is no such reverse range-for: range-for only works forwards.
Let’s see how to traverse a collection backwards by using a range for loop...
By Adrien Hamelin | Feb 12, 2020 02:57 PM | Tags: community
Did you know them?
Five Awesome C++ Papers for the Prague ISO Meeting and C++20 Status
by Bartlomiej Filipek
From the article:
Continuing the tradition for other ISO C++ Meetings, I prepared a blog post where you’ll learn about:
- The current status of C++20
- an overview about the Prague ISO C++ Meeting (10th till 15th February 2020)
- a few interesting papers that are worth reading
Let’s start!
By Adrien Hamelin | Feb 12, 2020 02:53 PM | Tags: c++20
What do you think?
Concepts in C++20: An Evolution or a Revolution?
by Rainer Grimm
From the article:
Let me conclude my series to concepts with this meta-post. Are concepts an evolution or a revolution in C++? The answer to this question bothered me quite a time...
By Adrien Hamelin | Feb 11, 2020 12:40 PM | Tags: basics
Quick A: It is possible.
Recently on SO:
Setting a vector equal to {};
It's valid (since C++11).
std::vectorhas an overloaded operator= takingstd::initializer_list.
By Adrien Hamelin | Feb 11, 2020 12:35 PM | Tags: intermediate
How do you do it?
Various Ways of Applying a Function to the Elements of a Collection in C++
by Jonathan Boccara
From the article:
Applying a function to each element of a collection of object is a basic use case of manipulating collections, in C++ or anywhere else for that matter...
By Adrien Hamelin | Feb 11, 2020 12:31 PM | Tags: c++20
Concepts continued.
C++20: Define the Concept Regular and SemiRegular
by Rainer Grimm
From the article:
When you want to define a concrete type that works well in the C++ ecosystem, you should define a type that "behaves link an int". Formally, your concrete type should be a regular type. In this post, I define the concepts Regular and SemiRegular...
By Corentin Jabot | Feb 7, 2020 11:45 AM | Tags: c++23
SG-11, the study group charged of all things concurrency and parallelism made forward progress and sent the proposal to LEWG - with the hope of landing a future revision in the C++23 draft. This is rather big news given that this work has been brewing for about a decade.
A Universal I/O Abstraction for C++
by Corentin Jabot
From the article:
The year is 2020 and even consummer CPUs feature double digits number of cores, storage offers 10GB/s read speeds and networks have to accommodate ever-growing traffic.
For a long time, the C++ committee seemed to think that either async file I/O didn’t make sense or was fundamentally irreconcilable with networking. This belief would lead to two inter-incompatible APIs in the standard, which would be a nightmare in term of usability (aka ASIO and AFIO).
It seems that there is finally a way to resolve these divides:
io_uring offers very high performance I/O which doesn’t discriminate on device type.
Sender Receiver provides the composable, low-cost, non-allocating abstraction while offering a simple mental model for asynchronous operations lifetime.
Coroutines make asynchronous i/o dead simple for the 99% use case.
Asynchronous Networking is nice.Asynchronous I/O is better.
AWAIT ALL THE THINGS!
By Adrien Hamelin | Feb 4, 2020 02:29 PM | Tags: c++20
Getting familiar with concepts.
C++20 Concepts
by omnigoat
From the article:
A quick syntax-based overview of C++20 Concepts, as they are in the standard (circa January 2020)...
By Adrien Hamelin | Feb 4, 2020 02:28 PM | Tags: community
Don't miss it!
C++ in 2020
by Jens Weller
From the article:
Now where the year is a few weeks old, lets see whats ahead for C++ in 2020!
I'll cover the Meeting C++ Community Survey, Conferences, Libraries & Releases, ISOCPP and C++20.
This blog post is based on a newsletter, which is based on a talk I gave at my User Group in Düsseldorf two weeks ago. Come and visit our meetings at the 3rd Wednesday of the month! My C++ User Group is also still looking for speakers in 2020, contact me if you're in town!
By fj | Jan 31, 2020 05:20 AM | Tags: None
A taste of functional stack of effects.
Decorating with a side effect
by Krzysztof Ostrowski
From the article:
Logging is one of such overused features, that leads to costly side effects (consider distributed logging, a DLT, prevalent in automotive industry). This article describes a technique that is used to extract side effects brought by logging, and then compose with them back in a well defined manner.