public void Visit(BinarySub node)
{
sb.Append("(");
node.LeftChild.Accept(this);
sb.Append("-");
node.RightChild.Accept(this);
sb.Append(")");
}
public bool TryParse(string formula, out FormulaNode node)
{
if (formula == "-")
{
node = new BinarySub(leftNode, rightNode);
return(true);
}
else
{
node = null;
return(false);
}
}
public void Visit(BinarySub node)
{
if (!cachedResult.HasValue)
{
node.LeftChild.Accept(this);
node.RightChild.Accept(this);
int valueTwo = results.Pop();
int valueOne = results.Pop();
checked
{
results.Push(valueOne - valueTwo);
}
}
}
public void Visit(BinarySub node)
{
OperationPriorities priority = prevPriorities.Pop();
if ((int)priority > 1)
{
sb.Append("(");
prevPriorities.Push(OperationPriorities.Sub);
node.LeftChild.Accept(this);
sb.Append("-");
prevPriorities.Push(OperationPriorities.Sub);
node.RightChild.Accept(this);
sb.Append(")");
}
else
{
prevPriorities.Push(OperationPriorities.Sub);
node.LeftChild.Accept(this);
sb.Append("-");
prevPriorities.Push(OperationPriorities.Sub);
node.RightChild.Accept(this);
}
}