public override bool VisitNum_expr([NotNull] GrammarParser.Num_exprContext context) { Console.WriteLine($"Numeric Expression {context.GetText()}"); if (context.ChildCount == 1) { string expression = SearchAndReplace(context.GetChild(0).GetText()); try { var test = float.Parse(expression); Console.WriteLine("Succesfully accepted!"); } catch (Exception) { Console.WriteLine("Error man"); } } else { } return(base.VisitNum_expr(context)); }