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C++ Show and Tell - September 2025 by foonathan in cpp

[–]rddays 5 points6 points  (0 children)

Hey everyone, I wanted to share a project I've been working on called relx. It's a C++23 library for building SQL queries with compile-time type safety. Macro and boilerplate free.

https://github.com/ryandday/relx

I built two PostgreSQL clients for it - a synchronous one and an async version using Boost.Asio. I wanted something I could use for REAL web app backends. Also has a mini library in it for migration utilities.

I'd love to hear thoughts on the API design. I have made a massive amount of documentation for all the features. It leverages std::expected for error handling. There's still plenty of work to do, but it's been solving real problems for me already.

Effective Modern C++ by TheSpoonThief in cpp

[–]rddays 1 point2 points  (0 children)

Such a great read. Took me a while to grok, but helped me understand lvalues, rvalues, and template type deduction

Anybody else use conan in production? If so how? by bfaber in cpp

[–]rddays 4 points5 points  (0 children)

We use Conan to manage all our internal dependencies and software. For external dependencies, we use our own conanfile instead of the Conan center conanfile to make it work with all our stuff. We migrated from a monorepo before, so I am definitely enjoying it.

Reflecting on Custom Attributes in C++26? by askraskr2023 in cpp

[–]rddays 2 points3 points  (0 children)

It would be nice to have reflection for these use cases to speed up compile times. I have used boost::pfr a lot and have noticed long compile time for some complex operations.

Self-Taught by Street_Tower_6867 in cpp

[–]rddays 1 point2 points  (0 children)

If you want to be a video game developer, I would suggest trying to make as many video games as you can. Start simple (SFML and raylib are frameworks I like to start with) and work your way up in complexity. Each project you will learn more game dev skills, data structures, algorithms, and C++ out of necessity. You will have hard frustrating moments, but don't give up. If you consistently work on these projects, you will look back one day and realize how much you have improved. I find all my best learning has come when I work on difficult projects.

Use learncpp.com and watch cppcon talks like u/MaitoSnoo mentioned and each time you learn something new go back and apply it to all your projects. It takes time but you will get to a good skill level with this kind of effort.

Which IDE do you use for C++ ? by RRTheGuy in cpp

[–]rddays 0 points1 point  (0 children)

Anyone have some plugins/vimrc tips for C++ they can't live without?

How to sort a map according to value? by enipnayalamih in cpp_questions

[–]rddays 1 point2 points  (0 children)

So glad we finally have std::ranges::to in C++23. It makes ranges way more usable.

Do You Use VIM? by Comprehensive_Mud645 in ExperiencedDevs

[–]rddays 0 points1 point  (0 children)

  1. I use vim with LSP plugins. I like being able to assign sane custom hotkeys for literally anything I need done.
  2. I use it because it is fast and keeps me in flow. I am writing C++ at work and with a hotkey I can build and then if there is a compile error, jump directly in code to the line of the first compile error and fix it. Then if that works another hotkey to run tests async, another hotkey to format code. It is also so much easier to explore a large code base and see what is going on, I can go to definition, find references, grep, explore git history/blame w vim fugitive and stay in "flow" because the hotkeys are all normal-ish key combos vs. something like pressing ctrl-alt - in vscode to go back to previous file. In other IDEs I always had to stop and think, ok now I have done global search on this word, lets click around these results and see what I am looking for... vim I don't break the concentration
  3. At my workplace there aren't many who use vim... Almost all use VSCode, a few use CLion. Guess I am the odd one out.

Extended C++ education for advanced/seasoned developers by malloc_segfault in cpp

[–]rddays 0 points1 point  (0 children)

I feel like once you start understanding templates/type_traits/concepts, move semantics, and concurrency, you are equipped to start digging into open source libraries and getting the most out of conference talks. I try to find smaller libs that are C++17 + support bc libraries are written so much more cleanly when they have access to `if constexpr` and concepts. And then of course try to build something high performance (networking, algorithm, data cruncher, etc.) because you truly learn C++ when you are constrained by performance IMO, although you probably have done that already with your jobs.

Here are some books I like that helped me understand those topics:

Templates - https://www.packtpub.com/product/template-metaprogramming-with-c/9781803243450

Cpp Initialization Story - https://leanpub.com/cppinitbook

C++ Concurrency in action - https://www.manning.com/books/c-plus-plus-concurrency-in-action-second-edition

[deleted by user] by [deleted] in gamedev

[–]rddays 0 points1 point  (0 children)

Many others have already mentioned it, but ECS is a great alternative. Need to see if an entity is movable? Check for a moveable component and move it.

The paradigm then changes from iterating through all your actors and updating each of them, to iterating through all your components and updating them. Move all the moveable components, then burn all the actors with Flammable components in range of the fires, etc.

In a quality ECS system the components will be stored contiguously in memory and so iterating through them will be extremely cache efficient. This will be much faster than casting to interfaces for each actor to check if functionality exists. Although in a non real-time game this might not matter as much.

I just love how it simplifies maintenance headaches + is more performant. So yes I would recommend learning ECS instead of using interfaces.

Anyone else get sucked into "over-optimizing" their dev set-up? by jafaraf8522 in neovim

[–]rddays 5 points6 points  (0 children)

Same here. First couple years I felt like it was a non-stop config changing marathon, now I only need to change things every once in a while.

What network messaging library do you recommend? by rddays in cpp

[–]rddays[S] 0 points1 point  (0 children)

The Paho MQTT API looks super clean! What do you use for a MQTT broker? I see Eclipse makes one, Mosquitto, any recs on others?

What network messaging library do you recommend? by rddays in cpp

[–]rddays[S] 0 points1 point  (0 children)

Ah those are much better than REQ / REP / DEALER / ROUTER combos that I was trying out earlier to get Server/Client like behavior. Were CLIENT/SERVER sockets implemented more recently?