Director

Director 是 Rust 语言中的一个简单、通用、易用的状态机。 (no-std)

| 示例 | 文档 | 最新笔记 |

director = "0.5.0"

原因?

因为编写状态机有点繁琐。不符合人类的习惯。难以实现架构的灵活性、可读性和更强的可分析性。 这个包 提供了所有这些。并且经过良好的优化[例：RAII]。所以你不需要担心你的实现会有糟糕的性能。

如何使用,

use crate::Engine; // Any common state

#[director::state {
    super = StateBaz,
    sub = [StateBar, StateBar2]
}]
pub struct StateFoo {
    count: u32,
}

impl director::State<Engine> for StateFoo {
    /// This determines whether or not to run this local state machine.
    fn toggle(engine: &mut Engine, inner: Option<&Self>) -> bool {
        director::on!(inner, None) || director::off!(state: StateBaz, Some(state) if state.count > 1000)
    }
    /// This creates and imports new initial state on this local state machine when the toggle's on.
    fn load(engine: &mut Engine) -> Self {
        Self { count: Self::lock_super__state_baz().get().count }
    }
    /// This executes custom logics and manipulates this local state machine's states.
    fn run(&mut self, engine: &mut Engine) {
        self.count += 1;
        println!("{}", self.count);
    }
    /// When the toggle's off
    fn drop(&self, engine: &mut Engine) {
        // ...
        // After then, the sub states[i.e) StateBar and StateBar2] will be droped automatically.
    }
}

pub struct Engine; // i.e) dummy engine

#[director::main(std::syn)] // It can be any kind of Mutex
fn main() {
    for _ in 0..10000 {
        StateBaz::run(&mut engine);
    }
}