C++ - Reddit

A virtual pointer pattern for dynamic resolution in C++ — years in production I've been working on Olex2, a crystallography software package, for over 20 years. At some point I needed pointers whose target wasn't a fixed address but a runtime decision — "whatever is currently the active object of this type." The result was olx_vptr — a virtual pointer where resolution is delegated to a user-defined get_ptr(): https://github.com/pcxod/olex2/blob/master/sdl/olxvptr.h The calling code uses natural pointer syntax and knows nothing about how resolution happens. A concrete use looks like this: struct VPtr : public olx_virtual_ptr<TXFile> { virtual IOlxObject *get_ptr() const; }; olx_vptr<TXFile> thip(new VPtr()); lib->Register( new TFunction<TXFile>(thip, &TXFile::LibGetFormula, "GetFormula", ..... (https://github.com/pcxod/olex2/blob/master/xlib/xfiles.cpp#L1427) Single virtual dispatch, fully type-safe, open to any resolution strategy. I'm surprised this pattern never made it into the standard or common literature. Has anyone seen something similar? Would there be interest in a more formal writeup? https://redd.it/1spvxx6 @r_cpp

Adding Stack Traces to All C++ Exceptions https://werwolv.net/posts/cpp_exception_stacktraces/ https://redd.it/1spnzjn @r_cpp

mini project I built a small to-do List project in C++ I'd appreciate if you can take a quick look and give feedback on: \>File structure \>Code design \>Any bad practices \> the name must be one word like (ex_ex_ex) and i can't solve that GitHub link: to-do\_list\_cpp/to\_do\_list.cpp at main · TheGreat-A7A/to-do\_list\_cpp https://redd.it/1spmp6g @r_cpp

Live Coding in C++ Is Difficult But Not Impossible https://youtu.be/Tb8Ni1jdcGI?t=989 https://redd.it/1spjik3 @r_cpp

Using Internal Partitions https://abuehl.github.io/2026/04/18/using-internal-partitions.html https://redd.it/1spe1lu @r_cpp

Opinions on Introducing C++: The Easy Way to Start Learning Modern C++ by Frances Buontempo What do you guys think about the book Introducing C++: The Easy Way to Start Learning Modern C++ by Frances Buontempo i was considering to buy it because i want to learn c++ and i already have some experiences coding in other languages it seems like a sort of successor to accellerated c++ https://redd.it/1sp3epy @r_cpp

Next week: Interview with Guy Davidson at Meeting C++ online https://www.meetup.com/de-de/meeting-cpp-online/events/314162009 https://redd.it/1sozbmk @r_cpp

A simplified model of Fil-C https://www.corsix.org/content/simplified-model-of-fil-c https://redd.it/1som5pr @r_cpp

C++26 2026-04 Update https://en.cppreference.com/cpp/compiler_support/26 https://redd.it/1sojtkm @r_cpp

Built an AI overlay that disappears on screen share — one Win32 API call, C++, and a week of evenings Built this after getting frustrated during technical interviews — an AI assistant that's literally invisible on screen share I kept wondering why there wasn't a clean way to have a personal reference window open during video calls without it being visible on screen. Then I found out about SetWindowDisplayAffinity — a Windows API that lets you exclude a window from all capture. OBS, Zoom, Teams, Google Meet — none of them pick it up. The window exists on your screen, nowhere else. Spent a week building an overlay on top of it. Floating AI assistant. Only you can see it. That's the whole thing. Shipped it at www.unviewable.online. For anyone curious about the tech — it's C++ with CMake, the magic is literally one Win32 API call. Windows has had this since Windows 10 2004 and barely anyone talks about it. Wild. https://redd.it/1sodzjg @r_cpp

cppreference is back up! but overloaded I just clicked a link that wasn’t cached and noticed very long loading time. Eventually the page loaded, and I noticed the font was different. After Herb’s post, I was excited and noticed the homepage notice declared the site newly operational again! However I am experiencing a significant number of 5xx errors. https://redd.it/1so7kx8 @r_cpp

Built a Preemptive Task Scheduler in C++ from scratch: Performance comparison across Windows, Linux, and PREEMPT_RT kernel. https://prejudice.tistory.com/45 https://redd.it/1so5213 @r_cpp

build2 0.18.1 released, adds package manager Fetch Cache, JSON Compilation Database, and official binary packages https://build2.org/release/0.18.0.xhtml https://redd.it/1so1igj @r_cpp

Online talk on building a C++ based custom language and lexer internals Developers from PVS-Studio are continuing their series of talks about creating a custom programming language. They will explain what the lexer is, what it consists of, and how to work with it. The talk series as a whole is for devs who want to start understanding how compilers work under the hood. Throughout the series, their C++ architect demonstrates the practical application of each programming language component. If you're interested, I leave the link here. https://redd.it/1so08nx @r_cpp

HPX Tutorials: Performance analysis with Traveller https://www.youtube.com/watch?v=xN5BM7FzDsI https://redd.it/1snyotu @r_cpp

C++20 Modules: The Tooling Gap https://ignition.github.io/posts/cpp20-modules-the-tooling-gap/ https://redd.it/1snx6r8 @r_cpp

Documenting my Chess Engine Journey So Far! Just thought I'd pop this here. Am writing a Chess Engine in C++ and am blogging all the trials, tribulations and optimizations in what I'm hoping is a semi-humorous and entertaining way. Would love any feedback you might have and also would love feedback on the code which is available towards the top! https://olly-evans.github.io/chess/ https://redd.it/1snwal6 @r_cpp

Question to Module Users: How Do You Use Partitions? Quick question for those who currently use modules with partitions. That is, for a module like the one below (our file Core/\_Module.ixx): export module Core; export import :Attach; export import :Base; export import :Container; export import :Diagram; export import :Interfaces; export import :Transaction; export import :View; How did you implement your code? What we did: We have done it as I've described in my blog posting "How a Module Should Look", which is for example for our file Core/Transaction/FinalizerDock.cpp: module Core; import :Transaction; ... which contains function definitions for declarations in the partition Core/Transaction/Transaction.ixx: export module Core:Transaction; ... Please tell me what you did. I'm really curious. Thanks in advance for the responses! https://redd.it/1snrk4q @r_cpp

I built a tool for C++ devs using Neovim that shows field offsets, padding, alignment, and total struct/class size from clang. It also handles STL types and templates. https://github.com/J-Cowsert/classlayout.nvim https://redd.it/1snn58i @r_cpp

SFML 3.1 is released https://github.com/SFML/SFML/releases/tag/3.1.0 https://redd.it/1sndilj @r_cpp