#fsm #state #state-machine

nightly macro no-std sm_macro

💋 SM – a static State Machine macro

2 unstable releases

0.7.0 Oct 4, 2018
0.6.1 Sep 18, 2018

#17 in Simulation

Download history 10/week @ 2018-11-12 10/week @ 2018-11-19 22/week @ 2018-11-26 7/week @ 2018-12-03 11/week @ 2018-12-10 23/week @ 2018-12-17 9/week @ 2018-12-24 2/week @ 2018-12-31 10/week @ 2019-01-07 5/week @ 2019-01-14 4/week @ 2019-01-21 3/week @ 2019-01-28 1/week @ 2019-02-04 4/week @ 2019-02-18

47 downloads per month
Used in 1 crate

MIT/Apache

53KB
1.5K SLoC

SM aims to be a safe, fast and simple state machine library.

  • safe — Rust's type system, ownership model and exhaustive pattern matching prevent you from mis-using your state machines

  • fast — zero runtime overhead, the machine is 100% static, all validation happens at compile-time

  • simple — five traits, and one optional declarative macro, control-flow only, no business logic attached


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Quick Example

extern crate sm;
use sm::sm;

sm! {
    Lock {
        InitialStates { Locked }

        TurnKey {
            Locked => Unlocked
            Unlocked => Locked
        }

        Break {
            Locked, Unlocked => Broken
        }
    }
}

fn main() {
    use Lock::*;
    let lock = Machine::new(Locked);
    let lock = lock.transition(TurnKey);

    assert_eq!(lock.state(), Unlocked);
    assert_eq!(lock.trigger().unwrap(), TurnKey);
}

Dependencies

~793KB
~18K SLoC