Using QtCreator together with the Visual Studio Build Tools

by Jens Weller

For a while I've been using QtCreator as my IDE, mostly because its deep integration with Qt, as most of my projects are Qt related. With this, I also preferred (and still do a little) to use the MinGW builds of Qt on Windows. In the past, as GCC was a little bit better with the newer standards, today, well, never change a running system...

Dependencies in the Gang of Four examples

by Zebedee Mason

The example C++ code from the GoF (Gang of Four) book Design Patterns has had its dependencies analysed with DeepEnds. Certain examples have been refactored to remove circular dependencies enabled by pre-declaration of classes. These cycles in the graph serve to reduce the ability to subsequently modify the code with ease.

Fold Expressions

by Rainer Grimm

With fold expressions you can implement the from Haskell known functions foldl, foldr, foldl1 and foldr1 directly in C++. These four functions successively reduce a list to a single value...

Wrapping Callbacks with Futures

by Anthony Williams

Libraries the perform time-consuming operations, or network-based operations, often provide a means of running the task asynchronously, so that your code can continue with other things while this operation is performed in the background...

Un-Deprecate Your Qt Project

by Giuseppe D'Angelo

Any product needs to evolve if it wants to remain competitive. If the development bandwidth is finite, from time to time there is the need to drop some ballast. This does not necessarily mean dropping working functionality and leaving users in the cold. At least in Qt most of the time this actually means replacing working functionality with better working functionality.

This process has being going on in Qt since forever, but since Qt 5.0 we’ve started to formalize it in terms of documentation hints and macros in the source code. This was done with a precise purpose: we wanted Qt users to discover if they were using deprecated APIs, and if so, let them know what better alternatives were available.

Slides of the 24th of January 2017 BeCPP Meeting

• "BeC++17 – Part II" (Peter Van Weert)
• "Our Journey to C++" (Cosmin Cremarenco)

If you couldn’t attend the event in person, or if you would like to go over the material again, you can download them from the BeCPP website.

C++ User Group meetings in February

by Jens Weller

The monthly overview on upcoming C++ User Group meetings. For February there are already 33 User Group meetings planned. Also in this month are emBO++ and C++ Russia!

There are 4 new C++ User Groups: Nashua, NH, Vienna (Qt), Austin (Mentoring & Study Group), Montréal.

C++17's Variadic `using`

by Jason Turner

In this episode Jason builds on the concept of inheriting from lambdas to show how several C++17 features, hinging on variadic using declarations, can be combined to create a succinct merging of lambdas.

How C++ lambda expressions can improve your Qt code

by Aurélien Gâteau

In case you’ve missed it, lambda expression support has been added to C++ in C++11. In this article we are going to see how to take advantage of lambda expressions in your Qt code to simplify it and make it more robust, but also which pitfalls to avoid...

Stepanov-Regularity and Partially-Formed Objects vs. C++ Value Types

by Marc Mutz

In this article, I will take a look at one of the fundamental concepts introduced in Alex Stepanov and Paul McJones’ seminal book “Elements of Programming” (EoP for short) — that of a (Semi-)Regular Type and Partially-Formed State.

Using these, I shall try to derive rules for C++ implementations of what are commonly called “value types”, focusing on the bare essentials, as I feel they have not been addressed in sufficient depth up to now: Special Member Functions.