public void SMG_04_05_Simplyify()
{
var sm = new StateMachine();
var stype = sm.AddSimpleType("S");
stype.AddStateNames(new[] { "A", "B", "C", "D", "X" });
var v = sm.AddVariable("v", stype);
var u = sm.AddVariable("u", stype);
// A + B
var c1 = new StateCondition(v);
c1.SetPreStates(new[] { 0, 1 });
// D
var c2 = new StateCondition(v);
c2.SetPreStates(new[] { 3 });
// A
var c3 = new StateCondition(v);
c2.SetPreStates(new[] { 0 });
var c1dc = Gate.ComposeAND(Gate.Invert(c1.Decompose(ConditionMode.Pre)), Gate.Invert(c2.Decompose(ConditionMode.Pre)));
Trace("1 === {0}", c1dc);
return;
}
public void SMG_03_StateCondition()
{
TraceFlags.ShowDepencencyAnalysis = true;
var sm = new StateMachine();
var stype = new SimpleStateType("State");
stype.AddStateNames(new[] { "A", "B", "C" });
var s = sm.AddVariable("s", stype);
var t = sm.AddVariable("t", stype);
var c = new StateCondition(s);
c.SetPreStates("A,B");
c.SetPostStates("C");
var e1 = sm.AddEvent("e1");
var trigger = new Trigger(e1, c);
sm.AddTrigger(trigger);
var gc1 = new StateCondition(s);
gc1.SetPreStates("A");
// gc1.SetPostStates("C");
sm.AddGuard(gc1, GuardType.LEAVE, "g1");
var gc2 = new StateCondition(s);
gc2.SetPreStates("C");
sm.AddGuard(gc2, GuardType.ENTER, "g2");
{
var c1 = new StateCondition(t);
c1.SetPreStates("A");
var c2 = new StateCondition(s);
c2.SetPreStates("A");
}
sm.Calculate();
// sm.Dump();
var e = sm.Events.First();
Assert.AreEqual("e1", e.Name);
Assert.AreEqual(2, e.Triggers.Count);
var t1 = e.Triggers[0];
var t2 = e.Triggers[1];
Assert.AreEqual(2, t1.Guards.Count);
Assert.AreEqual(1, t2.Guards.Count);
Assert.IsTrue(t1.Guards.Any(g => g.Name == "g1"));
Assert.IsTrue(t1.Guards.Any(g => g.Name == "g2"));
Assert.IsTrue(t2.Guards.Any(g => g.Name == "g2"));
}
/// <summary>
/// Expresses a post state of a variable as an expression of variable preconditions.
/// </summary>
/// <param name="v">The variables</param>
/// <param name="poststateindex">The post state to express.</param>
/// <returns>The resulting gate.</returns>
public IGate InferPostState(Variable v, int poststateindex)
{
IGate r = new FalseGate();
VariableTransitions vt;
var match = false;
if (_variables.TryGetValue(v.Index, out vt))
{
foreach (var t in vt.Where(t => t.NewStateIndexes.Contains(poststateindex)))
{
foreach (var i in t.PreStateIndexes)
{
var e = t.Parent.CreateElementaryCondition(i);
r = Gate.ComposeOR(r, e);
match = true;
}
}
if (!match)
{
var sc = new StateCondition(vt.Variable);
sc.SetPreStates(new int[] { poststateindex });
r = sc.CreateElementaryCondition(poststateindex);
}
}
Gate.TraceLabel(new ElementaryCondition(v, poststateindex), r, "infer state");
return(r);
}
private ICondition ReplaceCondition(ICondition c, bool post)
{
if (c is StateCondition)
{
var sc = (StateCondition)c;
if (_transitions.Contains(sc.Variable))
{
// replace the transition condition with either its pre or post states
if (sc.IsTransition)
{
// transition condition
if (!post)
{
// replace with precondition
var rc = new StateCondition(sc);
rc.SetPreStates(sc.StateIndexes);
c = rc;
}
else
{
// replace with postcondition
var rc = new StateCondition(sc);
rc.SetPreStates(sc.PostStateIndexes);
c = rc;
}
}
}
}
return(c);
}
void StateCondition(out ICondition cond)
{
string varname; Variable v; StateCondition scond = null; IdList pre, post;
cond = null;
Identifier(out varname);
v = SM.GetVariable(varname);
if (la.kind == 29)
{
Get();
scond = new StateCondition(v);
StateIdentifierList(out pre);
scond.SetPreStates(pre);
if (la.kind == 27)
{
Get();
StateIdentifierList(out post);
scond.SetPostStates(post);
}
Expect(30);
}
cond = (ICondition)scond ?? new BooleanCondition(v);
}