private Formula ReadFormula(CompoundExpression exp, Dictionary <string, string> dParameterNameToType, bool bParamterized, Domain d)
{
bool bPredicate = true;
//Debug.WriteLine(exp);
if (d != null && d.IsFunctionExpression(exp.Type))
{
Predicate p = ReadFunctionExpression(exp, dParameterNameToType, d);
return(new PredicateFormula(p));
}
else if (IsUniversalQuantifier(exp))
{
CompoundExpression eParameter = (CompoundExpression)exp.SubExpressions[0];
CompoundExpression eBody = (CompoundExpression)exp.SubExpressions[1];
string sParameter = eParameter.Type;
string sType = eParameter.SubExpressions[1].ToString();
dParameterNameToType[sParameter] = sType;
ParametrizedFormula cfQuantified = new ParametrizedFormula(exp.Type);
cfQuantified.Parameters[sParameter] = sType;
Formula fBody = ReadFormula(eBody, dParameterNameToType, true, d);
cfQuantified.AddOperand(fBody);
return(cfQuantified);
}
else
{
foreach (Expression eSub in exp.SubExpressions)
{
if (eSub is CompoundExpression)
{
bPredicate = false;
break;
}
}
if (bPredicate)
{
return(ReadPredicate(exp, dParameterNameToType, bParamterized, d));
}
else
{
CompoundFormula cf = new CompoundFormula(exp.Type);
int iExpression = 0;
for (iExpression = 0; iExpression < exp.SubExpressions.Count; iExpression++)
{
if (exp.SubExpressions[iExpression] is StringExpression)
{
throw new InvalidDataException();
}
Formula f = ReadFormula((CompoundExpression)exp.SubExpressions[iExpression], dParameterNameToType, bParamterized, d);
cf.SimpleAddOperand(f);
}
if (cf.Operator == "not" && cf.Operands[0] is PredicateFormula)
{
PredicateFormula fNegate = new PredicateFormula(((PredicateFormula)cf.Operands[0]).Predicate.Negate());
return(fNegate);
}
return(cf);
}
}
}
private void ReadInitState(Problem p, Domain d, CompoundExpression eInitState)
{
foreach (Expression e in eInitState.SubExpressions)
{
CompoundExpression eSub = (CompoundExpression)e;
if (d.IsFunctionExpression(eSub.Type))
{
p.AddKnown(ReadFunctionExpression(eSub, null, d));
}
else if (d.ContainsPredicate(eSub.Type))
{
p.AddKnown(ReadGroundedPredicate(eSub, d));
}
else
{
if (eSub.Type != "unknown")
{
Formula f = ReadGroundedFormula(eSub, d);
if (f is CompoundFormula)
{
p.AddHidden((CompoundFormula)f);
}
if (f is PredicateFormula)//this happens in (not (p)) statments
{
p.AddKnown(((PredicateFormula)f).Predicate);
}
}
else
{
//causing a problem - add operand does some basic reasoning - adding p and ~p results in true for or statements.
//skipping unknown for now...
Predicate pUnknown = ReadGroundedPredicate((CompoundExpression)eSub.SubExpressions[0], d);
CompoundFormula cfOr = new CompoundFormula("or");
cfOr.SimpleAddOperand(pUnknown);
cfOr.SimpleAddOperand(pUnknown.Negate());
p.AddHidden(cfOr);
}
}
}
}
