using uCalcSoftware;

var uc = new uCalc();
uc.DefineVariable("x = 1");
uc.DefineVariable("y = 2");
uc.DefineFunction("f(x) = x * 10");

var t = uc.NewTransformer();
var text = "Adding {x} and {y} gives: {x + y}. f(5) = {f(5)}";

var uNew = new uCalc();
uNew.DefineVariable("x = 111");
uNew.DefineVariable("y = 222");
uNew.DefineFunction("f(x) = x * 1000");

// Note: {@@Eval: txt} is equivalent of {@Eval: Eval(txt)}
// which is what's needed for to evaluate the expression
// resulting from the match that is not known ahead of time
t.FromTo("'{' {expr} '}'", "{@@Eval: expr}");
Console.WriteLine(t.Transform(text));

t.uCalc = uNew;
t.FromTo("'{' {expr} '}'", "{@@Eval: expr}");
Console.WriteLine(t.Transform(text));