State machine library A state represents a particular condition The Boost. Filename Release Date File Size; StateMachineLib-1. Readme License. state-machine compile-time cpp20 Resources. @acts_as_state_machine class Turnstile (object): locked = State The <1 kb state machine hook for React. Batteries Included. To send the state machine back to sleep is easy. The state machine starts on the idle state. NET platforms. StateML schematics can be compiled to a growing number of formats, languages, and interpreters. Sweet, just what I need. 4% coverage. Saga State Machines. It allows you to easily add hierarchical (HSM) or finite state machine (FSM) to your project. How the state machine should initialize can depend on your application requirements, so the library provides a number of simple options. With 3,007 lines, that's about 1. Typesafe transitions - pass data in typesafe way from event to state A curated list of awesome resources related to finite state machines and statecharts. Finite-state transducers are automata for which each transition has an output label in addition to the more familiar input label. When selecting a state machine library, consider the following Statesman was developed because we couldn't find anything like it. XState provides a powerful and flexible way to manage application and workflow state by allowing developers to model logic as actors and state machines. Dec 28, 2013 · StatePy is an event driven hierarchical finite state machine library that lets you easily design, build, and analyze state machines. Identify all possible states in your application. Reset() (this isn't quite true for child state machines). Alright, let's check out the last one for the definition: Implementing code using a state machine is an extremely handy design technique for solving complex engineering problems. We'll implement that logic when we get to it, but so far our definition has everything we need for that to happen. zip: C++20 State Machine library Topics. NET Very versatile and easy to use. The FSM can change from one state to another in response to some inputs; the change from one state to another is called a 📚 A simple library for realization state machines in C# code Topics library csharp state-machine state finite-state-machine netstandard statemachine simple-state-machine simplestatemachine C++14 State Machine library. New shopping carts are in a draft state. In behaviour, the generated state machines would be similar to the ones generated by this library, including the firing of events for state transitions. NET enabled Windows platforms (including UWP , IoT , Mono ) and NETMF . Net applications. The usage of finite state machines makes total sense for modern applications. ai is a visual software modeling platform for modeling your app & business logic as state machines/statecharts and actors, and scales to any level of complexity. active state machine is thread-safe; current state, queued events and history states can be persisted; extension support to extend functionality of state machine. js ichernev • 1. An Automaton can be used to quickly create a state machine over a Family of states, where each state is an object that implements the Oct 12, 2023 · This article demonstrates the state machine’s implementation in the C programming language. Introduction. Connected) would also evaluate to true. Stars. 5,063 specs with 100. I was reading Agile Principles, Patterns, and Practices in C# by Robert C. Yet another state machine library for Ruby. Great starting point for your next campaign. 0 generated tests per line. States machines are useful when you need deterministic execution of code. The concept is very simple, allowing the programmer to fully understand what is happening behind the scenes. The main motivation was to create a thread-safe FSM library and to achieve decent compile times for large and complex state machines not sacrificing performance. A state machine changes state by using Transitions. 32. The length of the FIFO is fixed to 256 such that the 8-bit unsigned integers head and tail are allowed to overflow and wrap around to 0 as defined by the C99 standard, avoiding the need for overflow checks in the dequeue and enqueue functions. This, again Nov 15, 2017 · A library that lets developer create state machines and lightweight state machine-based workflow directly inside . machine. It uses event-driven programming, state machines, statecharts, and the actor model to handle complex logic in predictable Dec 1, 2023 · The machine variable is an instance of the machine, in its initial init state. 4 • 9 years ago • 5 dependents published version 1. An FSM is a mathematical model of computation that can be used to design digital logic circuits and computer programs. Transitions are implemented as functions returning a boolean value and a next state number. The state parameter should be the value that was returned from the most recent call to the disable_irq() function. 5 and higher. Nov 20, 2019 · For a state machine to be deterministic means that on each input there is one and only one state to which it can transition from its current state. getState() property, which will report the precise current state, an isInState(State) method is provided. Yet Another State Machine library - a function pointer based state machine library for arduino A library for easy creation and managing of states machines based on function pointers. Net with Blazor in order to take the pain out of synchronizing your UI with your business logic. freq ([hz]) ¶ Returns the CPU frequency in hertz. Released in v0. enable_irq (state) ¶ Re-enable interrupt requests. To begin with, a member’s rental history is checked. The average state machine library can help you model states, prevent invalid transitions, and produce diagrams that help even non-technical people understand how the code behaves. . 4 , 9 years ago 5 dependents Jun 21, 2019 · We’re going to use a library called XState to build the state machines in an Angular app. All of the examples in this article are of deterministic state machines. 11 watching. Welcome to python-statemachine, an intuitive and powerful state machine library designed for a great developer experience. It follows the principles of the boost msm and boost sml libraries, but tries to reduce own complex meta programming code to a minimum. You can define the initial state of your state machine doing that command from the class constructor, or awake the state machine from a public method. Core finite state machine and statecharts library + interpreter: 📉 @xstate/graph: Graph traversal and model-based testing utilities using XState: ⚛️ @xstate/react: React hooks and utilities for using XState in React applications: 💚 @xstate/vue: Vue composition functions and utilities for using XState in Vue applications: 🎷 @xstate [Boost::ext]. State machines break down the design into a series of steps, or what are called states in state-machine lingo. It has zero dependencies, and is useful for frontend and backend application logic. all the bugs in that hot code path blissfully melted away. Sep 16, 2023 · Use your database to power state machines. It represents individuals states as classes, and by default uses static transition tables. The base and intermediary classes may also use transition maps. Validating the messages received from other parts of the vehicle and ensuring the messages your Autosar ECU sends are valid is crucial for functional safety. The state machine in Figure 1 has: a set of states: Open, Closed arrow_drop_down. The State Machine Library provides one way of constructing state machines; it is not the only way. We provide an pythonic and expressive API for implementing state machines in sync or asynchonous Python codebases. Be sure to read the docs ! But once your state machine grows large enough you might be better off by investing time into learning a library where most pitfalls has been already mitigated by enforcing some good practice. StatefulJ is a lightweight, open source Java Event Driven Finite State Machine(FSM) and a complete Spring Data based framework which lets you easily define and integrate State Machines into your Applications. Problem. A little different from the other awesome type lists HSMCPP is a C++ library providing implementation of state machine design pattern (also known as statecharts). The tables are simple python dicts maping events, which can be any hashable type, to the next state. Apr 7, 2019 · Versatile and flexible Python State Machine library. Create state machines and lightweight state machine-based workflows directly in . 8+. transition(state, 'switch') then it should transition from the off state to the on state. It is a simple, yet HSMCPP is a C++ library providing implementation of state machine design pattern (also known as statecharts). Scalable, supports robust state re-use via state injections; Hierarchical, with a selection of composite (sub-machine) and orthogonal regions; Gamedev-friendly, supports explicit State::update() Also supports traditional event-based workflow with State::react() Inspect anything: previous and current transitions, state activation status, and more! A state machine library in Kotlin and Swift. In this article, we're going to compare some popular state machine libraries and frameworks so you can make an informed decision for your next project. May 24, 2012 · Yep, Robin pointed out the problem with using a table indexed by event name instead of just a table of tables. NET and provides a C# syntax to define a state machine, including states, events, and behaviors. In this article, we will explain what is a state machine diagram, the components, and the use cases of the state machine diagram. This makes it ideal for real-time operating systems. Identify all the events in your application to the contrary, I took solutions in my own codebase that had grown beyond simplicity and wrapped the stateful transitions into a finite state machine. The hana state machine (hsm) is a finite state machine library based on the boost hana meta programming library. News. That reads a state transition table and generates C++ code. Apr 8, 2025 · A State Machine Diagram is used to represent the condition of the system or part of the system at finite instances of time. Requires LinkedList library The queue implementation is minimal by design and provides a 256 event FIFO such that the sequence of events occuring is maintained. " Transitions are implemented as functions returning a boolean value and a next state number. 0 8 projects tagged with “State machine“, by total number of stars: XState, Javascript State Machine, Zag, useStateMachine, Robot, Little State Machine, react-transition-state, driver Jun 19, 2021 · In this post we are going to look at how we can pair Stateless, a simple State Machine library for . Statechart - Arbitrarily complex finite state machines can be implemented in easily readable and maintainable C++ code. Zero dependencies! - eram/typescript-fsm arrow_drop_down. It decouples the state machine logic from the underlying model and allows for easy composition with one or more model classes. Eye-catching State Machine Diagram template: State Machine Diagram: Library System. To create the initial state, do the following. By default, if you don't specify any initial state, the state machine will be in the 'none' state and you would need to provide an event to take it out of this state: Nov 4, 2015 · Boost. Users can add items only to a draft The UML State Machine Diagram for the Library Management System shows how books are issued and returned through a certain series of actions. Feb 10, 2021 · "A simple state machine implementation. Meta State Machine - A very high-performance library for expressive UML2 finite state machines. Downloads. Features¶ Basic components: Easily define States, Events, and Transitions to model your logic. Jul 10, 2008 · The AT&T FSM libraryTM is a set of general-purpose software tools available for Unix, for building, combining, optimizing, and searching weighted finite-state acceptors and transducers. the state machine was far simpler and logically rigid. 4. Nov 29, 2018 · The StateMachine library implements a state machine that can run on a processor like Arduino. Learn Automatonymous is a most awesome state machine for . evaluateOnce attribute. Improved clarity and A state machine (or finite state machine) is a representation of an event-driven, reactive system that transitions from one state to another if the condition that controls the change is met. 0 stars. This is the second library I ported to Micropython from Arduino. The state machine implemented in this library is based on the theory of UML statechart. The main idea of this repository is to have a nice place when people can rely on nice quality content, such as articles, videos, ebooks, documents, books, etc. Installation : Apr 12, 2025 · One such library is the Spring State Machine, which provides a framework for building state machine-based applications. What is mode? This library provides three main types, Automaton, Mode, and Family, that facilitate the creation of finite state machines. The FSM can change from one state to another in response to some inputs; the May 20, 2022 · A Finite State Machine (FSM) is a theoretical model of computation based on a discrete, finite number of states. By default, if you dont specify any initial state, the state machine will be in the 'none' state and you would need to provide an event to take it out of this state: Finite State Machine library for Lua. 152. Welcome to Boost. Stateless - Create state machines and lightweight state machine-based workflows directly in . XState is a state management and orchestration solution for JavaScript and TypeScript apps. A state machine (or finite state machine) is a representation of an event-driven, reactive system that transitions from one state to another if the condition that controls the change is met. Readme Activity. If an action or a guard throws an exception then the library calls std::abort(). It provides a conceptual foundation and an extensive set of powerful and coherent tools that make doing explict metaprogramming in C++ as easy and enjoyable as possible within the current language. toEqual("bar"); You'll see that . It is an abstract structure that can be inherited to create a state machine. Mar 17, 2022 · KStateMachine is a Kotlin DSL library for creating finite state machines ( FSM) and hierarchical state machines (HSM)… A State Machine library for Arduino that provides usage for Finite State Machines (FSM) and Hierarchical State Machines (HSM). Custom properties. Watchers. On some ports this can also be used to set the CPU frequency by passing in hz When using state machine inheritance, it’s not just the most-derived class that may define external event functions. melt; freeze; vaporize; condense; A state machine can perform actions during a transition by observing Lifecycle Events. com Welcome to python-statemachine, an intuitive and powerful state machine library designed for a great developer experience. Apr 14, 2015 · pystatemachine is a versatile, yet easy-to-use finite-state machine library written in python. It uses event-driven programming, state machines, statecharts, and the actor model to handle complex logic in predictable, robust, and visual ways. This is an Arduino library to implement a simple Finite State Machine class. Game Characters: Managing the behavior of game characters based on their actions. State. Read more about the benefits of state machines. kstatemachine - (mandatory) state machine implementation (depends only on Kotlin Standard library) kstatemachine-coroutines - (optional) add-ons for working with coroutines (depends on Kotlin Coroutines library) kstatemachine-serialization - (optional) add-ons for serialization (depends on Kotlin Serialization library). An extension for the transitions state machine library which runs asynchronous state machines using anyio. It is a hidden state that does nothing. It has sample projects included to see the actual code in action. 9 fuzz tests with 12. Features. State-Oriented Programming: was a cover story article about Hierarchical State Machines in C and C++ published originally in "Embedded Systems Programming" magazine in August 2000. 0. NET Core. Statechart, a C++ library for finite state machines. XState is a best-in-class open source library for orchestrating and managing state in JavaScript and TypeScript apps. The following table compares features among popular c++ state machine libraries. The diplomatic path to building state machines in modern Python. Let's dive in! XState is a JavaScript library for creating, interpreting, and executing finite state machines and statecharts. StateMachine is used in Scarlet. Automatonymous is a state machine library for . We provide a pythonic and expressive API for implementing state machines in sync or asynchonous Python codebases. Contribute to boost-ext/sml development by creating an account on GitHub. Pseudo states for additional logic in machine behaviour. This would make the From trait stuff entirely optional - one assumes the implementer of a state machine understands their own state chart. The trigger for our Widget is to Press. September 16, 2023 Most people are familiar with state machines and know their value. It uses callbacks and offers several convenience functions for tracking the machine's state. NET code; Automatonymous - A state machine library for . State machines don't have exceptions. Nov 13, 2023 · Vending Machines: Handling the states of vending machine transactions. Each event has custom data and can produce different side effects. Go to repository. C++14 State Machine library. Net - allows you to write fluent style state machines Hierarchical State Machines for nesting and reuse; Diagrams to visualize the current state of a machine; Threadsafe Locks for parallel execution; Async callbacks for asynchronous execution; Custom States for extended state-related behaviour; There are two mechanisms to retrieve a state machine instance with the desired features enabled. 0 — A State Machine library for . Releases. One or more subclass state machine hierarchical levels may exist each adding more states. send("foo") returns a new machine instance that's in the target state (bar). It provides a State machine formalism very much in the spirit of Twin Activate. with an extra state performing the action and outgoing anonymous transitions with guards checking if the action failed or not. Squirrel: A state machine library that focuses on simplicity and ease of use, making it suitable for small to medium-sized applications. One of the main advantages of taking a "finite-state-first" (top-down) approach and using state machines is that the logic is not only more clear (since it's grouped by finite state), it's more robust: you can ensure that an event won't be improperly handled in a state that Enabling the next-generation of state machine and statechart tooling, visualizers, and interpreters. Previously known as Automatonymous, saga state machines were merged into the MassTransit codebase starting with v8. unity unity3d unity3d-plugin unity2d Resources. Its designer-crafted, professionally designed and helps you stand out. Use of this class will allow Arduino sketches to coöperatively multitask. The specification integration tests read a diagram file, generate executable state machine code, then compile and execute that code in another process and ensure that the state machine behavior is exactly what was expected. Some key concepts. When using transitions, a state machine may consist of multiple objects where some (machines) contain definitions for the manipulation of other (models). State machine library for Unity Topics. Read here what a state machine is and why a state machine is neat for hardware projects . StateSmith has a strong suite of tests (730+) and behavior specification coverage. Easy States provides APIs for key concepts of state machines: State: a particular state on which the machine can be at a given point in time; Event: represents an event that may trigger an action and change the state of the machine; Transition: represents a transition between two states of the machine when an event occurs; FiniteStateMachine May 24, 2022 · State Machines. The use cases for such a library are far-reaching, such as replicated state machines which are a key component of many distributed systems. A parent state machine doesn’t have awareness of child classes. Implemented in C#, suitable for all . TinyFSM is a simple finite state machine library for C++, designed for optimal performance and low memory footprint. Nov 11, 2016 · I have a T4 template that generates state machines from a static definition (in an XML file, if I recall correctly - I don't have it to hand). The reason it uses the erlang type is funny. NET. You have to model it e. It has been tested with Arduino, ESP8266 and ESP32 devices. Power related functions¶ machine. Choosing the Right Library. A simple and effective state machine library, written in idiomatic Rust. The projects GitHub page is informative, comprising the necessary details to kickstart a developer. Using a state machine to implement code is a valuable design strategy to resolve complex engineering issues. In Python, a state machine is typically implemented as a finite state machine (FSM). an Overview of State Machine. Such state machines do not have a single next_step method available. This example shows a Widget class that always has a deterministic state of being On or Off. but, of course, don't use a state machine library everywhere. statesman is a library that provides an elegant and expressive API for implementing state machines in asynchronous Python 3. - 0verflux/StateMachineLib Dec 21, 2024 · Finite state machine library based on the boost hana meta programming library. Below, we will look at some core concepts and how to work with them. Example State Diagram. Cool, so when our state machine is in the off state and we call machine. As such, the design of statesman is a little different from other state machine libraries: In addition to the StateMachine. See full list on github. Roadmap Any method public or private, not only states. Python State Management Library. 0% coverage. Option 1: Finite State machine with a pre-defined workflow: Recommended if you know all states in advance and state machine is almost fixed without any changes in future. active state machine handles state transitions asynchronously on the worker thread of the state machine. It uses event-driven programming, state machines, statecharts, and the actor model to handle complex logic in predictable Benefits of state machines State machines help build reliable and robust software. Readable, useful state machines as one-liner strings. That way, you avoid a separate state machine and the "context" with your variables accessed by the state machine. Despite the tiny size, useStateMachine is a feature-complete State Machine library, including features like Entry/Exit callbacks, Guarded transitions & Extended State (Context) Feb 17, 2025 · Java State Machine (JSM): A lightweight library that provides a simple API for defining and executing state machines. Generics enable the creation of This library allows you to quickly setup a State Machine. (by erikzenker) Jun 4, 2024 · The Light Switch State Machine Example. 209 stars. Most state machines are expressed using diagrams, but they can also be represented via text. Net software, supporting 4. Tested with Arduino, ESP8266 and ESP32. Nested states - build hierarchical state machines (statecharts) with cross-level transitions support. While we could implement the state machine as we did previously, I recommend encapsulating state machines within a class. The concepts behind it are about organizing the way a device, computer program, or other (often technical) process works such that an entity or each of its sub-entities is always in exactly one of a number of possible states and where there are well-defined A finite-state machine (FSM), finite-state automaton (FSA), or simply state machine is a mathematical model of computation and an abstract machine that can be in exactly one of a finite number of states at any given time. 7 tests per line, or 2. Composed (nested) state machines - use state machines as atomic child states. onBeforeMelt; onAfterMelt; onLeaveSolid; onEnterLiquid A state machine can also have arbitrary Data and Methods. State machines take the overall design and split it into stages, referred to as states inside the state-machine This, to my mind, is worthless garbage. To evaluate a piece of code only once while the machine is in a particular state, you can use the machine. * 概念： SML ， State Machine Libray。一个用boost实现的状态机库。关于状态机的相关知识查阅其他文档，这里不在述说。 什么情况下，你会使用它？请看下面的文件，如果你的代码和下面代码一样，感到迷惑或者逻辑复… Dec 3, 2024 · Welcome to python-statemachine, an intuitive and powerful state machine library designed for a great developer experience. If the state machine internalised the transitions behind an event API, no incorrect usage would be possible in any case. Two great state machines for . Stately. send("foo"); expect(res. TS-FSM is a strongly typed finite state machine for TypeScript that is using async operations. May 8, 2024 · statesman. 1 watching. This library implements a basic state machine with transitions and might be useful for implementing logic controllers. Fork the AMYR library and look through the specs for the FiniteStateMachine The goal of this library is to give you a close to the State Pattern simplicity with much more flexibility. - twrackers/StateMachine-library Finite state machine library based on the boost hana meta programming library. And, if needed, the full state machine functionality, including FSM , HSM , PDA and other tasty things. Modern applications handle many different states and transitions Mar 25, 2023 · Benefits of using state machines. What is a Finite State Machine? I won’t go into detail here as there is a lot already written about them. A simple State Machine library for Arduino based on rppelayo's finite state machine library. Contribute to antw/simple_state development by creating an account on GitHub. Reply reply The afsm library was inspired by ::boost::msm library and implemented so that the migration from ::boost::msm was a bunch of search and replace operations. Statesman is an opinionated state machine library designed to provide a robust audit trail and data integrity. Lets start with some business rules for a simple shopping cart. NET code. Contribute to Yeson88/sml-State-Machine-library development by creating an account on GitHub. pysm - Python State Machine-----Versatile and flexible Python State Machine library. Currently, this needs to be done manually both ways but it should not be difficult to automate these tasks; Comprehensive UML semantics support: The machine only evaluates the current state until a transition occurs that points to another state. MIT license Activity. passive state machine handles state transitions synchronously. isInState(State) will take substates into account, so that if the example above was in the OnHold state, isInState(State. g. Multiple instances of a state machine can be created BigMachines is State Machine library for . GitHub; Docs; Visualizer; Editor; Community Jan 20, 2021 · As the author of the code, the event-first (bottom-up) approach might seem fine to you; after all, if it works, it works. Contribute to cornelisse/LuaFSM development by creating an account on GitHub. Forks. However, keep in mind that the goal of this article is not to be a detailed guide for implementing an Apr 2, 2023 · The Rust state machine library takes advantage of Rust’s powerful generics feature to make the library portable and adaptable to various state machine designs. Jan 29, 2021 · Stateless 3. It’s a behavioral diagram and it represents the behaviour using finite state transitions. 5,072 tests, run 5,963 times. Learn in this article the E2E profiles, state machine and APIs. It has a send function that accepts valid events for that state (in this case foo and bar): const res = machine. By reducing the complexity of your system, state machines can also help reduce errors and make it easier to identify and correct problems. SML (State Machine Language/Lite/Library) Your scalable C++14 one header only State Machine Library with no dependencies (Try it online!GitHub Apr 19, 2022 · What is a state machine in Python? A state machine is a behavioral model that defines how an object behaves in response to events. Figure 1: Representation of a door using a state machine. Key Components of a Finite State Machine An FSM consists of several key components: A finite state machine (FSM) implementation for node. May 23, 2016 · With that in mind, the way that your state machine is currently structured is perfectly fine. It is a library for providing consensus. " A state machine is implemented by defining state logic as a function in your sketch. Running machines and sending commands to each machine is designed to be lock-free . Humans have been using finite state machines for a long time—a traffic light is a finite state machine, an elevator is a finite state machine, clockwork is a finite state machine, etc. raft is a Go library that manages a replicated log and can be used with an FSM to manage replicated state machines. I was thinking something like the following: E2E is a crucial part of functional safety, as it protects communication. //! Abstract state machine structure struct state_machine_t { uint32_t Event; //!< Pending Event for state machine const state_t* State; //!< State of state machine. 9 A finite-state machine (FSM), finite-state automaton (FSA), or simply state machine is a mathematical model of computation and an abstract machine that can be in exactly one of a finite number of states at any given time. Contexts: Supports user-defined contexts that encapsulates all relevant data and functionality needed for state callbacks, minimizing the need for accessing global variables or functions on callbacks. Features include: Straightforward transformation from UML statechart to executable C++ code and vice versa. Feb 12, 2022 · State Machine Library Hi all, I want to share with the community my State Machine library. It allows you to most quickly write state machines for . Basic components: Easily define States, Events, and Transitions to model your logic. Martin and Micah Martin, and fixated on Uncle Bob's State Machine Compiler (SMC). A UML and Statechart inspired state machine library with hierarchical and orthogonal states for . The FSM can change from one state to another in response to some inputs; the change from one state to another is called a A state machine needs to start at some initial state. You can implement Finite State Machine in two different ways. Feb 16, 2010 · The State machine is represented by state_machine_t structure. value). MPL library is a general-purpose, high-level C++ template metaprogramming framework of compile-time algorithms, sequences and metafunctions. Meet your new state machine library. If a member has not borrowed anything before, then they are given out books, and their status is changed accordingly. Learn Speaking of which, for implementing state machines in C++ I would recommend the technique where you inherit a state machine base class (as opposed to containing a state machine). NET code A common library for implementing CQRS based Domain layer. Do you know what are the key differences and what are considerations in choosing between the two? Just like the squirrel, a small, agile, smart, alert and cute animal, squirrel-foundation is aimed to provide a lightweight, highly flexible and extensible, diagnosable, easy use and type safe Java state machine implementation for enterprise usage. Python State Machine is a library for implementing state machines in Python with an intuitive and expressive API. While there is an embarassment of riches in the Python community with regard to FSM libraries, many have legacy ties back to the Python 2 era and address our first class requirements as add-ons rather than core functionality. Compatibility. One last note, keep in mind that firing triggers from within the same thread that's advancing the state machine and doing the state machine logic can and will lead to stackoverflow exceptions (see here on how to solve the auto advance issue). It is true each time the machine enters a new state until the first transition is evaluated. 5K: State Machine Reference Library: With a constantly growing library of out-of-the-box reference state machines, (found in the folder sm_reference_library) guaranteed to compile and run, you can jumpstart your development efforts by choosing a reference machine that is closest to your needs, and then customize and extend to meet the specific Oct 27, 2024 · It allows you to quickly define a state machine. Sep 16, 2024 · SML（State Machine Language）是一个专为C++14设计的高效、轻量级状态机库。它以单头文件的形式提供，无需任何外部依赖，使得集成和使用变得极为简单。SML的设计目标是为开发者提供一个易于使用、性能优越的状态机实现，适用于各种复杂的应用场景。 ## 项目技术分析 ### 核 The queue implementation is minimal by design and provides a 256 event FIFO such that the sequence of events occuring is maintained. Library uses generics to take the user states and events. State machines promote modularity, making it easier to test, reuse, and swap out different parts of your system without affecting the entire system. StateMachineLib. (by erikzenker) state machines that can be constructed using this library, and illustrates the use of its blocks through examples. A finite-state machine (FSM), finite-state automaton (FSA), or simply state machine is a mathematical model of computation and an abstract machine that can be in exactly one of a finite number of states at any given time. Creating a state machine In XState, a state machine (referred to as a “machine”) is created using the createMachine(config) function: Every state machine must have an initial state, this is the state which the state machine is in to start with, and which it returns to when you call StateMachine. naft cjiflddi dgpi rnpqbh odwqj askgp cmmng ilhiztzq rll djbt