Simplify Your Code With Rocket Science: C++20’s Spaceship Operator

by Cameron DaCamara

C++20 adds a new operator, affectionately dubbed the “spaceship” operator: <=>. There was a post awhile back by our very own Simon Brand detailing some information regarding this new operator along with some conceptual information about what it is and does.  The goal of this post is to explore some concrete applications of this strange new operator and its associated counterpart, the operator== (yes it has been changed, for the better!), all while providing some guidelines for its use in everyday code.

PVS-Studio in the Clouds - Running the Analysis on Travis CI

by Oleg Andreev

Travis CI is a service for building and testing software that uses GitHub as a storage. Travis CI doesn't require changing of programming code for using the service. All settings are made in the file .travis.yml located in the root of the repository. We'll take LXC (Linux Containers) as a test project for PVS-Studio. It is a virtualization system at the operation system level for launching several instances of the Linux OS at one node. The project is small, but more than enough for demonstration.

CppCast Episode 204: Functional Programming in C++ with Ivan Čukić

by Rob Irving and Jason Turner

Ivan Čukić is the author of "Functional Programming in C++" published by Manning.

He is one of the core developers of KDE, the largest free/libre open source C++ project.

He is also teaching modern C++ techniques and functional programming at the Faculty of Mathematics in Belgrade and has been using C++ for more than 20 years. He has been researching functional programming in C++ before and during his PhD studies, and uses the techniques in real-world projects.

The Power of Hidden Friends in C++

by Anthony Williams

"Friendship" in C++ is commonly thought of as a means of allowing non-member functions and other classes to access the private data of a class. This might be done to allow symmetric conversions on non-member comparison operators, or allow a factory class exclusive access to the constructor of a class, or any number of things.

However, this is not the only use of friendship in C++, as there is an additional property to declaring a function or function template a friend: the friend function is now available to be found via Argument-Dependent Lookup (ADL). This is what makes operator overloading work with classes in different namespaces...

C++ Core Guidelines: Iostreams

by Rainer Grimm

When you interact with the outside world, the iostream library is the way to go in C++. As always you have to keep a few rules in mind. Let me show, which rules...

“The STL From Scratch” is back!

by Arthur O’Dwyer

Registrations for CppCon 2019 are open, and so are registrations for my two-day pre-conference class, “The STL from Scratch.”...

C++ 2019 - The state of Developer Ecosystem in 2019 Infographic

by Jet Brains

People continue to adopt the new C++ standards. The usage of C++17 has grown by 10 percentage points since last year...

Pragmatic compiling of C++ to WebAssembly. A Guide.

by Thomas Deniffel

Most C++-Programmers I know of have already heard of WebAssembly, but most have had troubles getting started. This guide brings you beyond of a simple “Hello World”: To a stateful-applications with interactions between C++ and JavaScript...

Space Game: A std::variant-Based State Machine by Example

by Nikolai Wuttke

One of a powerful uses of std::variant is to implement State Machines. Some time ago I showed a simple example, but today we have something bigger. In today’s article by Nikolai Wuttke you’ll see how to leverage std::variant and build a space game!

In case you missed it: SFINAE and enable_if

by Eli Bendersky

There's an interesting issue one has to consider when mixing function overloading with templates in C++. The problem with templates is that they are usually overly inclusive, and when mixed with overloading, the result may be surprising...