Declaring the move constructor

by Andrzej Krzemieński

I am not satisfied with the solution I gave in the previous post. The proposed interface was this:

class Tool
{
private:
  ResourceA resA_;
  ResourceB resB_;
  // more resources
 
public:
  // Tools's interface
 
  Tool(Tool &&) = default;           // noexcept is deduced
  Tool& operator=(Tool&&) = default; // noexcept is deduced
 
  Tool(Tool const&) = delete;
  Tool& operator=(Tool const&) = delete;
};

static_assert(std::is_move_constructible<Tool>::value, "...");
static_assert(std::is_move_assignable<Tool>::value, "...");

In a way, it is self contradictory. The whole idea behind departing from the Rule of Zero is to separate the interface from the current implementation. Yet, as the comments indicate, the exception specification is deduced from the current implementation, and thus unstable...

Stack, Heap, Pool

by Tony “Bulldozer00” (BD00) DaSilva

The figure below shows three ways of allocating memory from within a C++ application: stack, heap, custom written pool...

Bitesize Modern C++ : Override and Final

by Glennan Carnie

In C++98 using polymorphic types can sometimes lead to head-scratching results...

A third way to use boost::serialization

by Jens Weller

The 10th part of my series about writing applications with Qt and boost is about using boost::serialization. The last part was about how to create the basic structure for a project with boost::filesystem, and how to use boost::filesystem to index folders. But there is a lot of data that just isn't able to be represented as single files, how to store it?

Originally I planned to use a database, as I already have some code handling the SQL queries nicely for me and most of my other applications currently also use this to store their data. Thats why most of my classes from the first day on had an id field, just to enable them to refer to an instance stored in a database. But then, if I could get around using a database, by simply just storing my data in a file, things would be easier, and my code wouldn't need to be scattered with SQL queries. If I couldn't find a reasonable approach, I still could opt for a database anyways.

C++ User Group Meetings in September

by Jens Weller

9.9 C++ UG Utah - Regular Monthly Meeting
9.9 C++ UG San Francisco/ Bay area - Presentation and Q&A
9.9 C++ UG Washington, DC - Q & A / Info Sharing 10.9 C++ UG Dresden - Scripting in C++
14.9 C++ UG Denver - Denver Tech Center C++ Developers
14.9 C++ UG Bristol - Tim Perry
14.9 C++ UG Zentralschweiz - Coding Dojo
16.9 C++ UG Düsseldorf - Treffen der C++ User Gruppe NRW
16.9 C++ UG North West/Seattle - The BBC micro: bit and C++
17.9 C++ UG Chicago - "Cross-compiling to C++" and "Can you make me more productive
21.9 C++ UG Austin - North Austin Monthly C/C++ Pub Social
23.9 C++ UG San Francisco/ Bay area - Workshop and Discussion Group
23.9 C++ UG Washington, DC - Q & A / Info Sharing
24.9 C++ UG Rhein-Neckar - C++ Usergroup Meeting
24.9 C++ UG Bremen - C++ - Vorstellung eines Frameworks für den Integrationtest
24.9 C++ UG Arhus - Libreoffice Hackfest
30.9 C++ UG San Francisco/ Bay area - CppCon Trip Report

Handling files - using boost::filesystem

by Jens Weller

As part of my data is actual files (images, css, js, files...), I realized that the best way to handle those, would be to just store and load them from the file system. In the UI Qt even offers good support for displaying a folder in an Application with QFileSystemModel. But in the application...

Bitesize Modern C++ : Range-for loops

by Glennan Carnie

If you’re using container classes in your C++ code (and you probably should be, even if it’s just std::array) then one of the things you’re going to want to do (a lot) is iterate through the container accessing each member in turn.

Without resorting to STL algorithms we could use a for-loop to iterate through the container...

Integrating an HTML Editor into Qt using Javascript and QWebView

by Jens Weller

This time its about integrating an HTML Editor into Qt using QWebView and Javascript! I'll start with text editors in general, and then continue to the integration, based on QWebkit and TinyMCE3. The end result is a little bit of hackery, but it is a working solution...

Can you see the bug?

by Andrzej Krzemieński

Recently, I was hit by one C++11 gotcha. It is funny: I know about it, I have blogged about it, and nonetheless I still fell into the trap...

Easier To Use, And More Expressive

by Tony DaSilva

One of the goals for each evolutionary increment in C++ is to decrease the probability of an average programmer from making mistakes by supplanting “old style” features/idioms with new, easier to use, and more expressive alternatives. The following code sample attempts to show an example of this evolution from C++98/03 to C++11 to C++14...