private void DoOr(Stack <Datum> stack)
{
BooleanDatum b = stack.Pop() as BooleanDatum;
BooleanDatum a = stack.Pop() as BooleanDatum;
BooleanDatum result;
if (a == null)
{
if (b == null)
{
result = new BooleanDatum(false);
}
else
{
result = new BooleanDatum(b.value);
}
}
else if (b == null)
{
result = new BooleanDatum(a.value);
}
else
{
result = new BooleanDatum(a.value || b.value);
}
stack.Push(result);
}
private void DoNotEqual(Stack <Datum> stack)
{
Datum a = stack.Pop();
Datum b = stack.Pop();
BooleanDatum result = new BooleanDatum(!a.Equals(b));
stack.Push(result);
}
public override bool Equals(object obj)
{
BooleanDatum other = obj as BooleanDatum;
if (other == null)
{
return(false);
}
return(value == other.value);
}
private void DoLessThanOrEquals(Stack <Datum> stack)
{
NumericDatum b = stack.Pop() as NumericDatum;
NumericDatum a = stack.Pop() as NumericDatum;
BooleanDatum result;
if (a == null)
{
result = new BooleanDatum(true);
}
else if (b == null)
{
result = new BooleanDatum(false);
}
else
{
result = new BooleanDatum(a.number <= b.number);
}
stack.Push(result);
}
