By Guy | Dec 8, 2021 10:49 AM | Tags: None
The Reflection TS was blessed with an example implementation recently, available on Compiler Explorer. Clément Pirelli gave it a spin and wrote a small post about what he found.
C++ Reflection TS: A First Look
by Clément Pirelli
From the article:
In this post, I’ll explain the basic ideas of the specification, how to write a simple generic “enum to string” function and go into a bit more detail with a proof-of-concept serialization function.
By philsquared | Dec 7, 2021 09:47 AM | Tags: c++20
C++20 is here! In fact, as we head towards 2022, it’s been here a while. It may surprise some, but we’re only a few months from a freeze on new proposals for C++23! But let’s not get ahead of ourselves. C++20 is a big release - at least the biggest since C++11 - some have said it's the biggest since the first standard in 1998!
Modernizing your code with C++20
by Phil Nash
From the article:
Another possible surprise is that support for C++20 is currently better in GCC and MSVC++ than in Clang. Nonetheless, significant chunks of the new language and library features are widely available across the three major compilers, already. Many of them, including some less well known features, are there to make common things safer and easier. So we’ve been hard at work implementing analyzer rules to help us all take full advantage of the latest incarnation of “Modern C++”. This is just the start, but we already have 28 C++20-specific rules in the latest releases of all our products (with many more in development).
Let’s take a peek at some of them.
By Adrien Hamelin | Nov 30, 2021 02:03 PM | Tags: c++20 advanced
Did you feel the need?
Conditional Members
by Barry Revzin
From the article:
I’d previously written a post about if constexpr (and how it’s not broken). I argued in that post how, broadly speaking, C++20 gives you the tools to solve the problems you want, even if they work a bit differently to D’s static if (with one notable exception, which this post greatly expands on). Now, over the past couple years, I’ve been working on a project that really is a deep dive into what Andrei calls “Design by Introspection.” This approach (for lack of a better definition), relies on conditioning functionality based on template parameters...
By Adrien Hamelin | Nov 30, 2021 02:02 PM | Tags: intermediate c++11
The series continue.
The Type-Traits Library: Type Checks
by Rainer Grimm
From the article:
The type-traits library is part of C++11 and supports type checks, type comparisons, and type modifications at compile-time. The library has more than 100 functions but grows with each new C++ standard release. Today, I present the type checks...
By Adrien Hamelin | Nov 30, 2021 01:03 PM | Tags: c++20
More readability.
Designated Initializers in C++20
by Bartlomiej Filipek
From the article:
New Standard, new ways to initialize objects!
With C++20, we get a handy way of initializing data members. The new feature is called designated initializers and might be familiar to C programmers.
Let’s have a look at this small feature...
By Adrien Hamelin | Nov 28, 2021 11:56 PM | Tags: intermediate
Did you ever use that?
Design Patterns VS Design Principles: Template Method
by Jonathan Boccara
From the article:
In today’s episode of “Design Pattens VS Design Principles” series, we relate the Template Method design patterns to more general design principles. We’re showing how it relates to the Polymorphism design principle...
By Adrien Hamelin | Nov 28, 2021 11:54 PM | Tags: intermediate
Will you try?
Template Metaprogramming - Hybrid Programming
by Rainer Grimm
From the article:
First of all, hybrid programming is not an official term. I created it to emphasize a very interesting aspect of templates. The difference between function arguments and template arguments...
By Adrien Hamelin | Nov 28, 2021 11:45 PM | Tags: performance
Did you know?
C++20: Heterogeneous Lookup in (Un)ordered Containers
by Bartlomiej Filipek
From the article:
Would you like to gain 20…35 or even 50% speed improvements when searching in associative containers? In this blog post, we’ll explore a technique called “heterogenous access” that offers such impressive speedups. We’ll explore ordered containers, and the support for unordered collections added recently in C++20...
By Andrey Karpov | Nov 27, 2021 01:38 AM | Tags: virtual functions pitfalls code analyzers
In different programming languages, the behavior of virtual functions differs when it comes to constructors and destructors. Incorrect use of virtual functions is a classic mistake. Developers often use virtual functions incorrectly. In this article, we discuss this classic mistake.
Virtual function calls in constructors and destructors
by Andrey Karpov
From the article:
So, what's the problem? You can find this information in any C++ programming book. The problem is that it's easy to forget about it! Thus, some programmers assume that foo and bar functions are called from the most derived C class. People keep asking the same question on forums: "Why does the code run in an unexpected way?" I think now you understand why it's easy to make a mistake in such code. Especially if you write code in other languages where the behavior is different. Let's look at the code fragment in C#.
By Jens Maurer | Nov 18, 2021 02:04 PM | Tags: c++11 basics
First steps using modern C++
Improving Stability with Modern C++, Part 3 — The
autoKeyword
by Ralph Kootker, FactSet
From the article:
Beginning with C++11,
autotriggers type deduction similar to how templates work. It enables code to be more concise, can improve readability, and in some cases even improve performance.