private ParsingResult parseLeaf(Node leaf, int timeIndex, int intervalDuration)
{
string leafExpression = leaf.getExpression();
string result = leafExpression;
double number;
if (!double.TryParse(result, out number))
{
string timeVariable = timeIndex == 0 ? "time" : string.Format("t{0}", timeIndex);
if (intervalDuration > 0)
{
timeVariable = string.Format("(+ {0} {1})", timeVariable, intervalDuration);
}
List <string> expressions = new List <string> {
timeVariable
};
ICollection <string> functionInputs = PropositionParser.extractParameters(leafExpression);
string functionName = PropositionParser.extractName(leafExpression);
foreach (string fInput in functionInputs)
{
expressions.Add(fInput);
}
result = SMTConstructsInstantiator.instantiateNaryOperator(functionName, expressions.ToArray());
}
return(new ParsingResult(result));
}
private ParsingResult parseUniaryOperator(InternalNode _operator, int timeIndex, int intervalDuration)
{
/*unary node in the tree structure,
* which means that the next expression for parsing is
* always in the right-hand-side node
*/
string operatorString = _operator.getExpression();
operatorString = PropositionParser.trnasformOperatorToSMTLIB(operatorString);
string result = SMTConstructsInstantiator.instantiateUnaryOperator(operatorString, parseNode(_operator.getRightHandSide(), timeIndex, intervalDuration).SmtExpression);
return(new ParsingResult(result));
}
private ParsingResult parseBinaryOperator(InternalNode _operator, int timeIndex, int intervalDuration)
{
string operatorString = _operator.getExpression();
ParsingResult leftSide = parseNode(_operator.getLeftHandSide(), timeIndex, intervalDuration);
/*only in a case of implication the interval duration is transferred to the right-hand size, otherwise not*/
if (operatorString.Equals("=>") && leftSide.IntervalDuration > intervalDuration)
{
intervalDuration = leftSide.IntervalDuration;
}
ParsingResult rightSide = parseNode(_operator.getRightHandSide(), timeIndex, leftSide.IntervalDuration);
operatorString = PropositionParser.trnasformOperatorToSMTLIB(operatorString);
string expression = SMTConstructsInstantiator.instantiateBinaryOperator(operatorString, leftSide.SmtExpression,
rightSide.SmtExpression);
return(new ParsingResult(expression));
}
