smlang 0.8.0

A no-std state machine language DSL
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

//! State data example
//!
//! An example of using state data together with an action.

#![deny(missing_docs)]

use smlang::statemachine;

/// State data
#[derive(PartialEq)]
pub struct MyStateData(pub u32);

statemachine! {
    transitions: {
        *State1 + Event1 / action = State2,
        State2(MyStateData) + Event2 = State1,
        // ...
    }
}

/// Context
pub struct Context;

impl StateMachineContext for Context {
    fn action(&mut self) -> Result<MyStateData, ()> {
        Ok(MyStateData(42))
    }
}

fn main() {
    let mut sm = StateMachine::new(Context);
    let result = sm.process_event(Events::Event1);

    assert!(matches!(result, Ok(&States::State2(MyStateData(42)))));
}