using uCalcSoftware;

var uc = new uCalc();
// Using {@Whitespace} to Count Indentation
// A common use case for parsing structured text (like Python or YAML)
// is capturing the exact whitespace at the start of a line.

uc.DefineVariable("IndentLen");

var t = uc.NewTransformer();
t.Text = "    Item 1"; // Indented by 4 spaces

// Capture the leading whitespace into 'w' and evaluate its length
t.FromTo("{@Whitespace:w} Item {id}", "<{@Self}>{@Exec: IndentLen = Length(w)}");
t.Transform();
// We can now analyze the captured whitespace
Console.WriteLine($"Indentation length: {uc.EvalStr("IndentLen")}");