private bool?EquationLaws(Equation rootEq, bool withEqRule, out object outputEq,
bool lineCheck = false)
{
/* Equation currentEq;
* if (Traces.Count == 0)
* {
* currentEq = this;
* }
* else
* {
* var tuple = Traces[Traces.Count - 1];
* var lst = tuple.Item2 as List<TraceStep>;
* Debug.Assert(lst != null);
* currentEq = lst[lst.Count - 1].Target as Equation;
* }*/
Equation currentEq = FindCurrentEq(rootEq);
outputEq = currentEq;
Debug.Assert(currentEq != null);
bool hasChange;
do
{
hasChange = false;
Equation localEq00 = currentEq.EvalTermInEquation(rootEq, true);
if (!localEq00.Equals(currentEq))
{
hasChange = true;
currentEq = localEq00;
}
Equation localEq0 = currentEq.EvalTermInEquation(rootEq, false);
if (!localEq0.Equals(currentEq))
{
hasChange = true;
currentEq = localEq0;
}
bool?satisfiable = Satisfy(currentEq);
if (satisfiable != null)
{
if (rootEq._innerLoop.Count != 0)
{
rootEq.GenerateATrace(EquationsRule.EqStrategy);
}
outputEq = currentEq;
return(satisfiable.Value);
}
var localEq000 = currentEq.ApplyTransitive2(rootEq, withEqRule, lineCheck);
if (!localEq000.Equals(currentEq))
{
hasChange = true;
currentEq = localEq000 as Equation;
}
var localObj1 = currentEq.ApplyTransitive(rootEq, withEqRule, lineCheck);
var localEq1 = localObj1 as Equation;
var localEqLst = localObj1 as List <Equation>;
if (localEqLst != null)
{
if (rootEq._innerLoop.Count != 0)
{
rootEq.GenerateATrace(EquationsRule.EqStrategy);
}
outputEq = localEqLst;
return(null);
}
if (localEq1 != null && !localEq1.Equals(currentEq))
{
hasChange = true;
currentEq = localEq1;
}
var localEq2 = localEq1.ApplySymmetric(rootEq);
if (!localEq2.Equals(localEq1))
{
hasChange = true;
currentEq = localEq2;
}
} while (hasChange);
if (rootEq._innerLoop.Count != 0)
{
rootEq.GenerateATrace(EquationsRule.EqStrategy);
}
outputEq = currentEq;
return(null);
}