void UnaryExpr(out IExpressionNode node)
{
IExpressionNode child;
UnaryOperator operatorNode = null;
if (la.kind == 23 || la.kind == 32 || la.kind == 33)
{
if (la.kind == 23)
{
Get();
operatorNode = new Negation();
}
else if (la.kind == 32)
{
Get();
operatorNode = new ToBoolean();
}
else
{
Get();
operatorNode = new NegateToBoolean();
}
}
Term(out child);
if (operatorNode != null)
{
operatorNode.child = child;
}
node = (operatorNode != null) ? operatorNode : child;
}
public double Evaluate(IDictionary <string, double> variables)
{
return(sequence.Aggregate(-1.0, (last, current) => (ToBoolean.Normalize(current.Evaluate(variables)) != last) ? 1 : -1));
}
