public IConvertable ForEquationItems(EquationItem[] equationItems)
{
_equationItems = equationItems;
_convertedEquation = new Stack <IReverseNotationItem>();
_operationsStack = new Stack <IOperation>();
return(this);
}
public EquationItem[] ParseEquationItems(string equation)
{
if (string.IsNullOrWhiteSpace(equation))
{
throw new ArgumentNullException(nameof(equation), "Equation not provided");
}
_equationItemsStack = new Stack <EquationItem>();
_operandBuilder.Clear();
foreach (var sign in equation)
{
var bracket = _bracketsFactory.InitializeFromSign(sign);
var operation = _operationFactory.InitializeFromSign(sign);
if (bracket != null || operation != null)
{
var equationItem = bracket ?? (EquationItem)operation;
AppendOperand();
_equationItemsStack.Push(equationItem);
}
else
{
_operandBuilder.Append(sign);
}
}
AppendOperand();
return(_equationItemsStack.Items);
}
