/// <summary>
/// Get all references that aren't part of another reference expression
/// </summary>
public IEnumerable <ParseTreeNode> References()
{
return(ExcelFormulaParser
.AllNodes(AllNodes, GrammarNames.Formula)
.Where(node => node.ChildNodes.Count == 1 && node.ChildNodes[0].Is(GrammarNames.Reference))
.Select(node => node.ChildNodes[0]));
}
/// <summary>
/// Provide formula analysis functions
/// </summary>
public FormulaAnalyzer(string formula) : this(ExcelFormulaParser.Parse(formula))
{
}