fsm
A pure functional finite state machine data structure for Elixir, designed for use within existing processes without requiring separate process management.
What is fsm?
Fsm is a pure functional finite state machine library for Elixir, implemented as an immutable data structure. It solves the problem of embedding state machines within existing processes without the overhead of managing separate processes, unlike OTP's gen_fsm. It provides a side-effect-free, composable way to model state transitions with support for data storage and dynamic definitions.
Elixir developers who need to implement state machines within existing processes, such as inside gen_servers or plain processes, and prefer a functional, immutable approach over process-based solutions like gen_fsm.
Developers choose Fsm because it eliminates the complexity of process management and cross-process communication, offering a simpler, more composable alternative to gen_fsm. Its pure functional design and support for data and dynamic definitions make it both robust and flexible for embedded state machine needs.
Overview
Finite State Machine data structure
Use Cases
Best For
- Embedding state machines inside existing Elixir processes without spawning new ones
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