public BinarOp(OperationToken.Operation opName, OpRand leftOpRand, OpRand rightOpRand, out ParserError error)
{
error = ParserError.Empty;
this.OpName = opName;
this.LeftOpRand = leftOpRand;
this.RightOpRand = rightOpRand;
}
public UnarOp(OperationToken.Operation opName, OpRand argument, out ParserError error)
{
error = ParserError.Empty;
this.OpName = opName;
this.Argument = argument;
if (opName == OperationToken.Operation.If)
{
CheckIfArgument(out error);
}
}
private bool IsValidOperation(LinkedListNode <Token> preStartNode, LinkedListNode <Token> nextNode, OperationToken.Operation opName)
{
if (opName == OperationToken.Operation.If ||
opName == OperationToken.Operation.Mod ||
opName == OperationToken.Operation.Div)
{
return((preStartNode == null || !IsLetter(preStartNode.Value)) &&
(nextNode == null || !IsLetter(nextNode.Value)));
}
if (opName == OperationToken.Operation.FormulaSign)
{
return(preStartNode == null);
}
return(true);
}
