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Speaking about C++ is tomorrow

By Meeting C++ | Jun 5, 2024 01:41 AM | Tags: meetingcpp intermediate community basics

Like in the last two years Meeting C++ is organizing an event about technical speaking at C++ conferences, aiming to help new speakers with their talks and give everyone a chance to pick up something to improve their talks! The call for talks for Meeting C++ 2024 is running until June 25th!

Speaking about C++

Organized by Jens Weller

From the event description:

This event will focus on the process of creating technical talks for the C++ community. Various speakers will share their views on how to submit, prepare and give talks to the C++ community in the form of lightning talks and a panel.

SObjectizer Tales – 26. Dispatcher selection--Marco Arena

By Marco Arena | Apr 4, 2024 03:35 AM | Tags: sobjectizer intermediate c++20

A new episode of the series about SObjectizer and message passing:

SObjectizer Tales – 26. Dispatcher selection

by Marco Arena

From the article:

In this episode we explore guidelines and considerations for binding agents to dispatchers. We'll emphasize the significance of asking pertinent questions rather than expecting definitive answers, as the decision-making process hinges on the unique requirements of the system.

Providing a stable memory address to an external API

By Meeting C++ | Mar 20, 2024 02:07 AM | Tags: performance meetingcpp intermediate experimental community c++20 advanced

A post on how to provide a pointer to a Qt Model/View or other APIs storing pointers to their data without using shared_ptr or unique_ptr for the actual object.

Providing a stable memory address

by Jens Weller

From the article:

Some APIs allow you to store a pointer to your data element. This is used to access additional information from your types to display them in Model/View Architecture.

A while ago I showed how you can implement a tree with shared_ptr and enable_shared_from_this and then display this in QTreeView. And when working on my current project I knew this problem would come around again. Maybe not for a tree and a tree view, but I'll clearly need to have some way to have ui panels display and edit my data classes and store a stable memory adress as a pointer in Qt models. Back in 2015 the Qt5 example still used a pointer allocated with raw new for this, in Qt6 the example uses unique_ptr. Using shared_ptr for this back in 2015 was a good decision, and the code works very well. For the moment I don't see that my current project would need to make use of enable_shared_from_this, so using unique_ptr would be a good option...