/// <summary>
/// Return parsed formula nodes without RPN
/// </summary>
public List <BaseFormulaNode> ParseWithoutRpn(ReadOnlySpan <char> formula)
{
var negativeBracketCounters = new BracketCounters();
var nodes = new List <BaseFormulaNode>();
for (int i = 0; i < formula.Length; i++)
{
var ch = formula[i];
if (ch.IsWhiteSpace())
{
continue;
}
if (FunctionCharReader.TryProceedFunctionChar(nodes, ch))
{
continue;
}
if (BracketReader.TryProceedOpenBracket(nodes, formula, negativeBracketCounters, ref i))
{
continue;
}
if (BracketReader.TryProceedCloseBracket(nodes, formula, negativeBracketCounters, ref i))
{
continue;
}
if (VariableReader.TryProceedBorderedVariable(nodes, formula, ref i))
{
continue;
}
if (NumberReader.TryProceedNumber(nodes, formula, ref i))
{
continue;
}
if (FunctionsReader.TryProceedFunction(nodes, formula, ref i))
{
continue;
}
if (VariableReader.TryProceedSimpleVariable(nodes, formula, ref i))
{
continue;
}
if (WordReader.TryProceedWord(nodes, formula, ref i))
{
continue;
}
if (ListReader.TryProceedList(nodes, formula, ref i))
{
continue;
}
if (OperatorReader.TryProceedOperator(nodes, formula, ref i))
{
continue;
}
}
return(nodes);
}
