ExcelFormulaParser.Engine.ExcelUtilities.NumericExpressionEvaluator.Evaluate C# (CSharp) Method

        public bool Evaluate(object left, string expression)
        {
            var operatorCandidate = GetNonNumericStartChars(expression);
            var leftNum = OperandAsDouble(left);
            if (!string.IsNullOrEmpty(operatorCandidate) && leftNum != null)
            {
                IOperator op;
                if (OperatorsDict.Instance.TryGetValue(operatorCandidate, out op))
                {
                    var numericCandidate = expression.Replace(operatorCandidate, string.Empty);
                    double d;
                    if (double.TryParse(numericCandidate, out d))
                    {
                        var leftResult = _compileResultFactory.Create(leftNum);
                        var rightResult = _compileResultFactory.Create(d);
                        var result = op.Apply(leftResult, rightResult);
                        if (result.DataType != DataType.Boolean)
                        {
                            throw new ArgumentException("Illegal operator in expression");
                        }
                        return (bool)result.Result;
                    }
                }
            }
            return _valueMatcher.IsMatch(left, expression) == 0;
        }