Show HN: CXXStateTree – A modern C++ library for hierarchical state machines

1 zigrazor 0 7/7/2025, 6:06:46 AM github.com ↗

Hi HN!

I've built [CXXStateTree](https://github.com/ZigRazor/CXXStateTree), a modern C++ header-only library to create hierarchical state machines with clean, intuitive APIs.

It supports: - Deeply nested states - Entry/exit handlers - State transitions with guards and actions - Asynchronous transitions with `co_await` (C++20 coroutines) - Optional runtime type identification for flexibility

It's ideal for complex control logic, embedded systems, games, robotics, and anywhere you'd use a finite state machine.

I’d love feedback, use cases, or contributions from the community!

Repo: https://github.com/ZigRazor/CXXStateTree

Bitchat – A decentralized messaging app that works over Bluetooth mesh networks (github.com)

Intel's Lion Cove P-Core and Gaming Workloads (chipsandcheese.com)

Building the Rust Compiler with GCC (fractalfir.github.io)

Show HN: I wrote a "web OS" based on the Apple Lisa's UI, with 1-bit graphics (alpha.lisagui.com)

The first time I was almost fired from Apple (engineersneedart.com)

High Performance Image Sensor Processing Using FPGAs [pdf] (oda.uni-obuda.hu)

Crypto 101 – Introductory course on cryptography (crypto101.io)

Swedish Campground (2004) (folklore.org)

Nobody has a personality anymore: we are products with labels (freyaindia.co.uk)

There's a COMPUTER inside my DS flashcart [video] (youtube.com)

I extracted the safety filters from Apple Intelligence models (github.com)

Opencode: AI coding agent, built for the terminal (github.com)

Show HN: Piano Trainer – Learn piano scales, chords and more using MIDI (github.com)

Get the location of the ISS using DNS (shkspr.mobi)

Thesis: Interesting work is less amenable to the use of AI (remark.ing)

Uncommon Uses of Python in Commonly Used Libraries (2022) (eugeneyan.com)

Functions Are Vectors (2023) (thenumb.at)

Backlog.md – Markdown‑native Task Manager and Kanban visualizer for any Git repo (github.com)

Show HN: A Language Server Implementation for SystemD Unit Files (github.com)

I don't think AGI is right around the corner (dwarkesh.com)

Lessons from creating my first text adventure (entropicthoughts.com)

Show HN: Modernized File Manager and Program Manager from Windows 3.x (github.com)

Jane Street barred from Indian markets as regulator freezes $566M (cnbc.com)

The Private Agent Memory Fallacy (blog.getzep.com)

Centaur: A Controversial Leap Towards Simulating Human Cognition (insidescientific.com)

Ziglings: Learn Zig by fixing broken programs (codeberg.org)

AI is coming for agriculture, but farmers aren’t convinced (theconversation.com)

Claude Code Pro Limit? Hack It While You Sleep (github.com)

Metriport (YC S22) is hiring engineers to improve healthcare data exchange (ycombinator.com)

The War on the Walkman (newsletter.pessimistsarchive.org)

Hannah Cairo: 17-year-old teen refutes a math conjecture proposed 40 years ago (english.elpais.com)

Data on AI-related Show HN posts (ryanfarley.co)

Toys/Lag: Jerk Monitor (nothing.pcarrier.com)

Collatz's Ant and Σ(n) (gbragafibra.github.io)

Massive study detects AI fingerprints in millions of scientific papers (phys.org)

Overclocking LLM Reasoning: Monitoring and Controlling LLM Thinking Path Lengths (royeisen.github.io)

ECC SystemVerilog Generator (github.com)

Can we test it? Yes, was can [video] (youtube.com)

Pangu's Sorrow: The Sorrow and Darkness of Huawei's Noah Pangu LLM R&D Process (github.com)

Take Two: Eshell (yummymelon.com)

Overthinking GIS (2024) (scottsexton.co)

Paper Shaders: Zero-dependency canvas shaders (github.com)

Evaluating the factuality of verifiable claims in long-form text generation (aclanthology.org)

1945 TV Console Showed Two Programs at Once (spectrum.ieee.org)

Curzio Malaparte's Shock Tactics (newyorker.com)

A New Postgres Block Storage Layout for Full Text Search (paradedb.com)

How to get started with Old English poetry (deadlanguagesociety.com)

Local-first software (2019) (inkandswitch.com)

Async Queue – One of my favorite programming interview questions (davidgomes.com)

'Improved' Grok Criticizes Democrats and Hollywood's 'Jewish Executives' (techcrunch.com)

Show HN: CXXStateTree – A modern C++ library for hierarchical state machines

Comments (0)