private static bool Operation()

in src/Elastic.Apm/Libraries/Newtonsoft.Json/Linq/JValue.cs [354:498]
133 lines of code
69 McCabe index (conditional complexity)

        private static bool Operation(ExpressionType operation, object? objA, object? objB, out object? result)
        {
            if (objA is string || objB is string)
            {
                if (operation == ExpressionType.Add || operation == ExpressionType.AddAssign)
                {
                    result = objA?.ToString() + objB?.ToString();
                    return true;
                }
            }

#if HAVE_BIG_INTEGER
            if (objA is BigInteger || objB is BigInteger)
            {
                if (objA == null || objB == null)
                {
                    result = null;
                    return true;
                }

                // not that this will lose the fraction
                // BigInteger doesn't have operators with non-integer types
                BigInteger i1 = ConvertUtils.ToBigInteger(objA);
                BigInteger i2 = ConvertUtils.ToBigInteger(objB);

                switch (operation)
                {
                    case ExpressionType.Add:
                    case ExpressionType.AddAssign:
                        result = i1 + i2;
                        return true;
                    case ExpressionType.Subtract:
                    case ExpressionType.SubtractAssign:
                        result = i1 - i2;
                        return true;
                    case ExpressionType.Multiply:
                    case ExpressionType.MultiplyAssign:
                        result = i1 * i2;
                        return true;
                    case ExpressionType.Divide:
                    case ExpressionType.DivideAssign:
                        result = i1 / i2;
                        return true;
                }
            }
            else
#endif
                if (objA is ulong || objB is ulong || objA is decimal || objB is decimal)
                {
                    if (objA == null || objB == null)
                    {
                        result = null;
                        return true;
                    }

                    decimal d1 = Convert.ToDecimal(objA, CultureInfo.InvariantCulture);
                    decimal d2 = Convert.ToDecimal(objB, CultureInfo.InvariantCulture);

                    switch (operation)
                    {
                        case ExpressionType.Add:
                        case ExpressionType.AddAssign:
                            result = d1 + d2;
                            return true;
                        case ExpressionType.Subtract:
                        case ExpressionType.SubtractAssign:
                            result = d1 - d2;
                            return true;
                        case ExpressionType.Multiply:
                        case ExpressionType.MultiplyAssign:
                            result = d1 * d2;
                            return true;
                        case ExpressionType.Divide:
                        case ExpressionType.DivideAssign:
                            result = d1 / d2;
                            return true;
                    }
                }
                else if (objA is float || objB is float || objA is double || objB is double)
                {
                    if (objA == null || objB == null)
                    {
                        result = null;
                        return true;
                    }

                    double d1 = Convert.ToDouble(objA, CultureInfo.InvariantCulture);
                    double d2 = Convert.ToDouble(objB, CultureInfo.InvariantCulture);

                    switch (operation)
                    {
                        case ExpressionType.Add:
                        case ExpressionType.AddAssign:
                            result = d1 + d2;
                            return true;
                        case ExpressionType.Subtract:
                        case ExpressionType.SubtractAssign:
                            result = d1 - d2;
                            return true;
                        case ExpressionType.Multiply:
                        case ExpressionType.MultiplyAssign:
                            result = d1 * d2;
                            return true;
                        case ExpressionType.Divide:
                        case ExpressionType.DivideAssign:
                            result = d1 / d2;
                            return true;
                    }
                }
                else if (objA is int || objA is uint || objA is long || objA is short || objA is ushort || objA is sbyte || objA is byte ||
                         objB is int || objB is uint || objB is long || objB is short || objB is ushort || objB is sbyte || objB is byte)
                {
                    if (objA == null || objB == null)
                    {
                        result = null;
                        return true;
                    }

                    long l1 = Convert.ToInt64(objA, CultureInfo.InvariantCulture);
                    long l2 = Convert.ToInt64(objB, CultureInfo.InvariantCulture);

                    switch (operation)
                    {
                        case ExpressionType.Add:
                        case ExpressionType.AddAssign:
                            result = l1 + l2;
                            return true;
                        case ExpressionType.Subtract:
                        case ExpressionType.SubtractAssign:
                            result = l1 - l2;
                            return true;
                        case ExpressionType.Multiply:
                        case ExpressionType.MultiplyAssign:
                            result = l1 * l2;
                            return true;
                        case ExpressionType.Divide:
                        case ExpressionType.DivideAssign:
                            result = l1 / l2;
                            return true;
                    }
                }

            result = null;
            return false;
        }