public override IValue PerformArithmericOperation(InterpretationContext context, IValue left, BinaryExpression.Operator operation, IValue right)
{
ListValue retVal = null;
switch (operation)
{
case BinaryExpression.Operator.Add:
Collection leftType = left.Type as Collection;
Collection rightType = right.Type as Collection;
Collection returnType;
if (leftType != null && rightType != null)
{
if (leftType is GenericCollection)
{
if (rightType is GenericCollection)
{
returnType = new GenericCollection(EFSSystem);
}
else
{
returnType = rightType;
}
}
else
{
if (leftType == rightType || rightType is GenericCollection)
{
returnType = leftType;
}
else if (leftType.Type == rightType.Type)
{
returnType = leftType;
}
else
{
throw new Exception("Cannot determine the collection type for expression");
}
}
ListValue leftValue = left as ListValue;
ListValue rightValue = right as ListValue;
if (leftValue != null && rightValue != null)
{
retVal = new ListValue(returnType, new List<IValue>());
foreach (IValue val in leftValue.Val)
{
if (!(val is EmptyValue))
{
retVal.Val.Add(val.RightSide(null, true, true));
}
}
foreach (IValue val in rightValue.Val)
{
if (!(val is EmptyValue))
{
retVal.Val.Add(val.RightSide(null, true, true));
}
}
}
else
{
throw new Exception("Cannot add a collection to a single element");
}
}
break;
}
return retVal;
}
public override IValue PerformArithmericOperation(InterpretationContext context, IValue left, BinaryExpression.Operator operation, IValue right)
{
ListValue retVal = null;
switch (operation)
{
case BinaryExpression.Operator.Add:
Collection leftType = left.Type as Collection;
Collection rightType = right.Type as Collection;
Collection returnType;
if (leftType != null && rightType != null)
{
if (leftType is GenericCollection)
{
if (rightType is GenericCollection)
{
returnType = new GenericCollection(EFSSystem);
}
else
{
returnType = rightType;
}
}
else
{
if (leftType == rightType)
{
returnType = leftType;
}
else if (leftType.Type == rightType.Type)
{
returnType = leftType;
}
else
{
throw new Exception("Cannot determine the collection type for expression");
}
}
ListValue leftValue = left as ListValue;
ListValue rightValue = right as ListValue;
if (leftValue != null && rightValue != null)
{
retVal = new ListValue(returnType, new List <IValue>());
foreach (IValue val in leftValue.Val)
{
if (!(val is EmptyValue))
{
retVal.Val.Add(val.RightSide(null, true, true));
}
}
foreach (IValue val in rightValue.Val)
{
if (!(val is EmptyValue))
{
retVal.Val.Add(val.RightSide(null, true, true));
}
}
}
else
{
throw new Exception("Cannot add a collection to a single element");
}
}
break;
}
return(retVal);
}
