public bool IsSubsetOf(Transition t)
{
if(!PreStateIndexes.Any(s => !t.PreStateIndexes.Contains(s)))
{
if (!NewStateIndexes.Any(s => !t.NewStateIndexes.Contains(s)))
{
return true;
}
}
return false;
}
private TransitionSet BuildTransitionSet(IEnumerable<IGate> terms, IEnumerable<IVariableCondition> rvclist)
{
var tset = new TransitionSet();
var result = Gate.Constant(false);
var staticvariables = new HashSet<int>();
foreach (var term in terms)
{
// populate a dictionary per variable factor
var dict = new Dictionary<int, ConditionPair>();
// right sides first
foreach (var right in rvclist)
{
dict.Add(right.Variable.Index, new ConditionPair { Right = right });
}
foreach (var left in term.GetVariableConditions())
{
ConditionPair cp;
if(dict.TryGetValue(left.Variable.Index, out cp))
{
// right side exists
cp.Left = left;
}
else
{
dict.Add(left.Variable.Index, new ConditionPair { Left = left });
}
}
// evaluate new term
var newterm = Gate.Constant(true);
foreach(var p in dict.Values)
{
if(null == p.Left)
{
// right side factor not present on left side, move static condition
newterm = Gate.ComposeAND(newterm, p.Right.Decompose());
}
else if(null == p.Right)
{
// static condition
newterm = Gate.ComposeAND(newterm, p.Left.Decompose());
}
else if(p.Left.StateIndex == p.Right.StateIndex)
{
// no state change: static condition
//newterm = Gate.ComposeAND(newterm, p.Left.Decompose());
throw new CompilerException(ErrorCode.BadCondition,
"variable consition " + p.Left + " used on both sides of a transition.");
}
else
{
newterm = Gate.ComposeAND(newterm, p.Left.Decompose());
// add transition
var x = new Transition(p.Left)
{
PreStateIndexes = new[] { p.Left.StateIndex },
NewStateIndexes = new[] { p.Right.StateIndex }
};
tset.Add(x);
}
}
result = Gate.ComposeOR(result, newterm);
}
_lgate = result;
return tset;
}
