Overload 173, February 2023

By Blog Staff | Feb 14, 2023 03:48 PM | Tags: None

Overload #173 is now available!

Highlights include:

• Floating-Point Comparison  WEB  PDF
  By Paul Floyd
  Comparing floating point values can be difficult. Paul Floyd shows how you should perform floating-point comparisons (and how not to do it).

• Determining If A Template Specialization Exists  WEB  PDF
  By Lukas Barth
  How do you tell if a class or function template can be used with specific arguments? Lukas Barth details his approach.

• Stack Frame Layout On x86-64  WEB  PDF
  By Eli Bendersky
  Stacks can have different layouts. Eli Bendersky describes the x86-64 layout in detail.

• Value-Oriented Programming  WEB  PDF
  By Lucian Radu Teodorescu
  The research Val programming language uses value-oriented programming. Lucian Radu Teodorescu explores this paradigm.

C++23 “Pandemic Edition” is complete -- Herb Sutter

By Blog Staff | Feb 13, 2023 03:30 PM | Tags: None

C++23 is done!

C++23 "Pandemic Edition" is complete (Trip report: Winter ISO C++ standards meeting, Issaquah, WA, USA)

by Herb Sutter

From the article:

On Saturday, the ISO C++ committee completed technical work on C++23 in Issaquah, WA, USA! We resolved the remaining international comments on the C++23 draft, and are now producing the final document to be sent out for its international approval ballot (Draft International Standard, or DIS) and final editorial work, to be published later in 2023...

... Per our published C++23 schedule, this was our final meeting to finish technical work on C++23. No features were added or removed, we just handled fit-and-finish issues and primarily focused on finishing addressing the 137 national body comments we received in the summer’s international comment ballot (Committee Draft, or CD). You can find a list of C++23 features here, many of them already implemented in major compilers and libraries. C++23’s main theme was “completing C++20,” and some of the highlights include module “std”, “if consteval,” explicit “this” parameters, still more constexpr, still more CTAD, “[[assume]]”, simplifying implicit move, multidimensional and static “operator[]”, a bunch of Unicode improvements, and Nicolai Josuttis’ personal favorite: fixing the lifetime of temporaries in range-for loops...

Modern C++ In-Depth — Lambdas, Part 3

By Jens Maurer | Feb 2, 2023 11:09 AM | Tags: c++11 basics

Lambdas

Modern C++ In-Depth — Lambdas, Part 3

by Michael Kristofik

From the article

In our last installment, we examined how lambdas work and how they help simplify code. Now let’s build on that knowledge to see how we might store a collection of lambda expressions.

The Toggle Builder -- Marco Arena

By Marco Arena | Feb 1, 2023 11:44 PM | Tags: intermediate design c++20

That little extra we might equip builder classes with:

The Toggle Builder

by Marco Arena

From the article:

If intended for general usage, the builder can result a bit uncomfortable when we go through some configuration object to toggle features. This often leads to a bunch of ifs..

Numbers are not easy -- Šimon Tóth

By Blog Staff | Feb 1, 2023 01:28 PM | Tags: None

As the blurb says, "The C++ integral and floating-types zoo"...

Numbers are not easy

by Šimon Tóth

From the article:

Arguably one of the most error-prone parts of C++ is integral and floating-point expressions. As this part of the language is inherited from C, it relies heavily on fairly complex implicit conversion rules and sometimes interacts unintuitively with more static parts of C++ language.

This article will cover the rules and several surprising corner cases one can encounter when working with integral and floating-point types and expressions...

The Rule of Zero, or Six -- Rainer Grimm

By Blog Staff | Feb 1, 2023 10:26 AM | Tags: None

Speaking of off-by-six errors...

The Rule of Zero, or Six

by Rainer Grimm

From the article:

The rule of zero, or six, is one of the advanced rules in modern C++. I wrote in my current book "C++ Core Guidelines Explained: Best Practices for Modern C++" about them. Today, I want to quote the relevant parts of my book in this post...

Regular Types -- Rainer Grimm

By Blog Staff | Feb 1, 2023 08:23 AM | Tags: None

As opposed to quirky eccentric ones...

Regular Types

by Rainer Grimm

From the article:

The term concrete type is strongly related to the term regular type. Let me, therefore, start this post with the term concrete type...

All about UBSan (UndefinedBehaviorSanitizer) -- MaskRay

By Blog Staff | Jan 31, 2023 08:20 PM | Tags: None

You've almost certainly heard about it. But if you haven't used it, read on...

All about UBSan (UndefinedBehaviorSanitizer)

... and then light it up today on your current project.

std::initializer_list in C++, Internals and Use Cases -- Bartłomiej Filipek

By Blog Staff | Jan 31, 2023 08:17 PM | Tags: None

Delving into the "how it works" and "why use it" of std::initializer_list...

std::initializer_list in C++, Internals and Use Cases

by Bartłomiej Filipek

From the article:

std::initializer_list<T>, is a lightweight proxy object that provides access to an array of objects of type const T.

The Standard shows the following example...

C++ Ecosystem in 2022: Fast Adoption of C++17 and C++20... -- Anastasia Kazakova

By Blog Staff | Jan 31, 2023 07:59 PM | Tags: None

A new year, a new wave of standards adoption...

C++ Ecosystem in 2022: Fast Adoption of C++17 and C++20, C++ Toolset Landscape, and Better Code Analysis Practices

by Anastasia Kazakova

From the article:

... In this post we’ll discuss the final results, review the trends, and learn which direction the C++ community is currently evolving in. We also invite you to read through the key takeaways and detailed data for many programming languages and areas of software development...

C++ standard: developers are moving fast to C++17 and C++20...