using uCalcSoftware; var uc = new uCalc(); var t = uc.NewTransformer(); t.Text = "Config { setting = 123; }"; // 1. Define the parent rule to capture the content inside the braces. var parentRule = t.Pattern("Config '{' {body} '}'").SetStatementSensitive(false); // 2. Get the local transformer for the parent rule. var local_t = parentRule.LocalTransformer; // 3. Define a rule that operates ONLY on the text captured by '{body}'. local_t.FromTo("setting = {val}", "Found Value: {val}"); // 4. Perform the transformation. // The local rule will run on the text " setting = 123; ". t.Transform(); Console.WriteLine(t.Text);