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 13, 2020 11:00 AM | Tags: c++17
Different compromise.
Runtime Polymorphism with std::variant and std::visit
by Bartlomiej Filipek
From the article:
Runtime polymorphism usually connects with v-tables and virtual functions. However, in this blog post, I’ll show you a modern C++ technique that leverages std::variant and std::visit. This C++17 technique might not only offer better performance and value semantics, but also interesting design patterns...
By Adrien Hamelin | Apr 13, 2020 10:55 AM | Tags: c++20
The series continue.
C++20: An Infinite Data Stream with Coroutines
by Rainer Grimm
From the article:
My story to coroutines in C++20 goes on. Today I dive deep into the coroutines framework to create an infinite data stream. Consequentially, you have to read the two previous posts "C++20: Coroutines - A First Overview", and "C++20: More Details to Coroutines" to be prepared...
By Szilard Szaloki | Apr 9, 2020 10:25 AM | Tags: None
Part2 of Fundamental operations on type lists is now available, featuring common template metaprogramming idioms, like multiple inheritance and the void* trick, demonstrated on simple metafunctions, such as push_front<>, push_back<>, pop_front<> and pop_back<>.
Fundamental operations on type lists (Part2)
by Szilard Szaloki
From the article:
Among the simplest metafunctions are
push_front<>andpush_back<>, since they can be easily implemented by leveraging C++11's parameter pack expansion...
By Szilard Szaloki | Apr 8, 2020 12:37 PM | Tags: None
Check out this article on basic C++ template metaprogramming concepts, such as type lists and metafunctions. This post also elaborates on alias templates and their limitations,
presents different approaches to implementing four fundamental metafunctions (first<>, front<>, last<> and back<>) and introduces a common metaprogramming primitive: apply<>.
Fundamental operations on type lists (Part1)
by Szilard Szaloki
From the article:
One of the fundamental building blocks of template metaprogramming is type lists. Dealing with them used to be a hassle, but since C++11 they are pretty much built into the language through type template parameter packs...
By Hitesh Kumar | Apr 8, 2020 12:00 PM | Tags: None
A comparison of string_view and span.
Differences between std::string_view and std::span
by nextptr
From this article:
As for the differences between the two, the std::span<T> is a general-purpose array view template, whereas the std::string_view is a more specialized view on a char sequence or string.
By Giovanni Dicanio | Apr 8, 2020 11:59 AM | Tags: None
A new C++ course was published in the Pluralsight library:
C++ Standard Library: Associative Containers
by Giovanni Dicanio
From the blog post:
In this course, you’ll learn with a combination of slides and demo code, how to use associative containers like
std::set,std::map, andstd::unordered_map.
By Marco Arena | Apr 7, 2020 12:09 AM | Tags: community
Due to COVID-19 global situation, we have made the decision that:
Italian C++ Conference 2020 will be an online-only event
by Marco Arena
From the article:
In light of recent developments globally and the growing concerns around the spread of the COVID-19 virus, we have made the decision that this year’s Italian C++ Conference will be an online-only/virtual event. It will be scheduled for the same day at the same time (June 13 from 9 AM to 6 PM CEST)...
By Adrien Hamelin | Apr 6, 2020 11:31 AM | Tags: c++20
Understand them to be able to use them.
C++20: More Details to Coroutines
by Rainer Grimm
From the article:
My job in this and further posts is to explain the framework for building coroutines. On the end, you can create your own or using an existing implementation of coroutines such as the excellent one cppcoro from Lewis Baker.
Today's post is in-between: This post is not an overview but also not in-depth dive into the coroutines framework that follows in the next posts.
The first question you may have is: When should I use coroutines?
By Adrien Hamelin | Apr 6, 2020 11:20 AM | Tags: c++20 c++17
Not so easy.
Implementing span's comparisons
by Barry Revzin
From the article:
One of the new types in C++20 is std::span<T> (with its fixed- size counterpart std::span<T, N>). This is a very useful type, since it’s a type-erased view onto a contiguous range - but unlike more typical type erasure (e.g. std::function), there’s no overhead. I’ve previous written about span here.
In the initial design, std::span<T> had comparison operators that performed a deep comparison. Those operators were subsequently removed. I think that removal was a mistake, since these operators are very useful (as in, we have a span-like type in our codebase and we use these operators), but this blog isn’t going to be about why they were removed or why they should be added back.
Instead, this blog is about how to implement span’s comparison operators, since I think that is interesting and demonstrates a bunch of C++20 features all in one go. You can jump straight to the C++20 implementation here or you can just directly add it to your code base using my span_ext repo here...
By Adrien Hamelin | Apr 6, 2020 11:15 AM | Tags: efficiency
An interesting solution.
C++ pass-thru parameters
by Marius Elvert
From the article:
So in ye olde days, before C++11 and move semantics, it was common for functions to use mutable references to pass container-content to the caller...