public override double VisitMinMaxExpr([NotNull] ExcelParser.MinMaxExprContext context) { var expr = context.GetText(); int start = 4; // MAX(132,2654) expr[4] = 1 int length = expr.IndexOf(')') - start; // length = Length ("132,2564") expr = expr.Substring(start, length); // MAX(132,2654) -> 132,2654 string[] numbers = expr.Split(','); // "132,2564" -> [0] = "132" [1] = "2564" double first = Convert.ToDouble(numbers[0]); double second = Convert.ToDouble(numbers[1]); if (context.operatorToken.Type == ExcelLexer.MAX) { return(Math.Max(first, second)); } else { return(Math.Min(first, second)); } }
/// <summary> /// Visit a parse tree produced by the <c>MinMaxExpr</c> /// labeled alternative in <see cref="ExcelParser.expression"/>. /// <para> /// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/> /// on <paramref name="context"/>. /// </para> /// </summary> /// <param name="context">The parse tree.</param> /// <return>The visitor result.</return> public virtual Result VisitMinMaxExpr([NotNull] ExcelParser.MinMaxExprContext context) { return(VisitChildren(context)); }
/// <summary> /// Exit a parse tree produced by the <c>MinMaxExpr</c> /// labeled alternative in <see cref="ExcelParser.expression"/>. /// <para>The default implementation does nothing.</para> /// </summary> /// <param name="context">The parse tree.</param> public virtual void ExitMinMaxExpr([NotNull] ExcelParser.MinMaxExprContext context) { }