Show HN: CXXStateTree – A modern C++ library for hierarchical state machines
zigrazor Monday, July 07, 2025
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
Summary
CXXStateTee is a lightweight, header-only, dependency-free, and cross-platform state management library for C++. It provides a simple and intuitive API for managing the state of an application, enabling developers to build scalable and testable software.
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Summary
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