using uCalcSoftware;

var uc = new uCalc();
var t = uc.NewTransformer();
t.DefaultRuleSet.RewindOnChange = true;
t.FromTo("AddUp({x})", "{x}");
t.FromTo("AddUp({x}, {y})", "({x} + AddUp({y}))");

Console.WriteLine(t.TraceTransform("AddUp(1, 2, 3, 4)").ListFunction("$'Step {Index}: {x}\n'"));

// 0 is the default IndexBase.  Here we will use 1 instead.
// So it will now start with "Step: 1" instead of "Step: 0"
Console.WriteLine("--- Now with IndexBase = 1 ---");
Console.WriteLine(t.TraceTransform("AddUp(1, 2, 3, 4)").ListFunction("$'Step {Index} of {Count}: {x}\n'").IndexBase(1));