无状态库 - PermitIf 与 SetTriggerParameters 一起使用<T>

Question

如何将 PermitIf 与 SetTriggerParameters 一起使用？

在这个例子中，我正在模拟一个电机，它可以前进、后退或关闭（不移动）。前进和后退可以是double的速度，所以我需要SetTriggerParameters<double>。但是，将速度设置为 0 会关闭电机。

我希望禁止使用参数 0 触发 TurnOnForwards 或 TurnOnBackwards - 我希望 TurnOff 触发器明确成为关闭电机的方式。否则，您会遇到当前状态为 Forwards/Backwards 但速度为 0.

的情况

这是我得到的错误：

CS1503 Argument 1: cannot convert from 'UserQuery.Triggers' to 'Stateless.StateMachine<UserQuery.State, UserQuery.Triggers>.TriggerWithParameters'

public enum State
{
    Off,
    Forwards,
    Backwards
}

public enum Triggers
{
    TurnOff,
    TurnOnForwards,
    TurnOnBackwards,
}

var machine = new StateMachine<State, Triggers>(State.Off);

var forwardsTrigger = machine.SetTriggerParameters<double>(Triggers.TurnOnForwards);
var backwardsTrigger = machine.SetTriggerParameters<double>(Triggers.TurnOnBackwards);

machine.Configure(State.Off)
    .PermitIf<double>(Triggers.TurnOnForwards, State.Forwards, (speed) => speed > 0) // error
    .PermitIf<double>(Triggers.TurnOnBackwards, State.Forwards, (speed) => speed < 0) // error
    .Permit(Triggers.TurnOnForwards, State.Forwards)
    .Permit(Triggers.TurnOnBackwards, State.Backwards);

machine.Configure(State.Forwards)
    .Permit(Triggers.TurnOnBackwards, State.Backwards)
    .Permit(Triggers.TurnOff, State.Off);

machine.Configure(State.Backwards)
    .Permit(Triggers.TurnOnForwards, State.Forwards)
    .Permit(Triggers.TurnOff, State.Off);


machine.Fire(Triggers.TurnOnForwards);
machine.Fire(Triggers.TurnOff);

machine.Fire(Triggers.TurnOnBackwards);
machine.Fire(Triggers.TurnOff);

这可能吗？

Answer 1

你现在可能已经弄明白了，但如果你使用参数化触发器，它将编译：

    machine.Configure(State.Off)
        .PermitIf(forwardsTrigger, State.Forwards, (speed) => speed > 0) // no error 
        .PermitIf(backwardsTrigger, State.Forwards, (speed) => speed < 0) // no error
        .Permit(Triggers.TurnOnForwards, State.Forwards)
        .Permit(Triggers.TurnOnBackwards, State.Backwards);

无状态库 - PermitIf 与 SetTriggerParameters 一起使用<T>

Stateless library - PermitIf usage with SetTriggerParameters<T>

.net

c#

state-machine

stateless-state-machine