public override string GenerateContent(Namespace data)
{
Datum datum = data.Get(DataName);
if (datum != null) {
return datum.ToString();
} else {
return ToString();
}
}
public Datum Evaluate(Namespace data)
{
if (this.Count == 0)
{
return(new NumericDatum(1));
}
Stack <Datum> stack = new Stack <Datum>();
foreach (Instruction instruction in this)
{
switch (instruction.OpCode)
{
case OpCode.Literal:
stack.Push(instruction.Datum);
break;
case OpCode.Get:
stack.Push(data.Get(instruction.DataName));
break;
case OpCode.Minimum:
DoMinimum(stack);
break;
case OpCode.Maximum:
DoMaximum(stack);
break;
case OpCode.Add:
DoAdd(stack);
break;
case OpCode.Subtract:
DoSubtract(stack);
break;
case OpCode.Multiply:
DoMultiply(stack);
break;
case OpCode.Divide:
DoDivide(stack);
break;
case OpCode.Modulo:
DoModulo(stack);
break;
case OpCode.Not:
DoNot(stack);
break;
case OpCode.And:
DoAnd(stack);
break;
case OpCode.Or:
DoOr(stack);
break;
case OpCode.Equal:
DoEqual(stack);
break;
case OpCode.NotEqual:
DoNotEqual(stack);
break;
case OpCode.LessThan:
DoLessThan(stack);
break;
case OpCode.LessThanOrEquals:
DoLessThanOrEquals(stack);
break;
case OpCode.GreaterThan:
DoGreaterThan(stack);
break;
case OpCode.GreaterThanOrEquals:
DoGreaterThanOrEquals(stack);
break;
}
}
return(stack.Pop());
}
public override void TagWillBeReplaced(TagBase tag, Namespace data)
{
oldValue = data.Get(dataName);
base.TagWillBeReplaced(tag, data);
}