public static Expression Fold()

in Microsoft.Azure.Cosmos/src/Linq/ConstantFolding.cs [24:99]
75 lines of code
50 McCabe index (conditional complexity)

        public static Expression Fold(Expression inputExpression)
        {
            if (inputExpression == null)
            {
                return inputExpression;
            }

            switch (inputExpression.NodeType)
            {
                case ExpressionType.Negate:
                case ExpressionType.NegateChecked:
                case ExpressionType.Not:
                case ExpressionType.Convert:
                case ExpressionType.ConvertChecked:
                case ExpressionType.ArrayLength:
                case ExpressionType.Quote:
                case ExpressionType.TypeAs:
                case ExpressionType.UnaryPlus:
                case ExpressionType.OnesComplement:
                case ExpressionType.Increment:
                case ExpressionType.Decrement:
                    return ConstantFolding.FoldUnary((UnaryExpression)inputExpression);
                case ExpressionType.Add:
                case ExpressionType.AddChecked:
                case ExpressionType.Subtract:
                case ExpressionType.SubtractChecked:
                case ExpressionType.Multiply:
                case ExpressionType.MultiplyChecked:
                case ExpressionType.Divide:
                case ExpressionType.Modulo:
                case ExpressionType.And:
                case ExpressionType.AndAlso:
                case ExpressionType.Or:
                case ExpressionType.OrElse:
                case ExpressionType.LessThan:
                case ExpressionType.LessThanOrEqual:
                case ExpressionType.GreaterThan:
                case ExpressionType.GreaterThanOrEqual:
                case ExpressionType.Equal:
                case ExpressionType.NotEqual:
                case ExpressionType.Coalesce:
                case ExpressionType.ArrayIndex:
                case ExpressionType.RightShift:
                case ExpressionType.LeftShift:
                case ExpressionType.ExclusiveOr:
                    return ConstantFolding.FoldBinary((BinaryExpression)inputExpression);
                case ExpressionType.TypeIs:
                    return ConstantFolding.FoldTypeIs((TypeBinaryExpression)inputExpression);
                case ExpressionType.Conditional:
                    return ConstantFolding.FoldConditional((ConditionalExpression)inputExpression);
                case ExpressionType.Constant:
                    return inputExpression;
                case ExpressionType.Parameter:
                    return ConstantFolding.FoldParameter((ParameterExpression)inputExpression);
                case ExpressionType.MemberAccess:
                    return ConstantFolding.FoldMemberAccess((MemberExpression)inputExpression);
                case ExpressionType.Call:
                    return ConstantFolding.FoldMethodCall((MethodCallExpression)inputExpression);
                case ExpressionType.Lambda:
                    return ConstantFolding.FoldLambda((LambdaExpression)inputExpression);
                case ExpressionType.New:
                    return ConstantFolding.FoldNew((NewExpression)inputExpression);
                case ExpressionType.NewArrayInit:
                case ExpressionType.NewArrayBounds:
                    return ConstantFolding.FoldNewArray((NewArrayExpression)inputExpression);
                case ExpressionType.Invoke:
                    return ConstantFolding.FoldInvocation((InvocationExpression)inputExpression);
                case ExpressionType.MemberInit:
                    return ConstantFolding.FoldMemberInit((MemberInitExpression)inputExpression);
                case ExpressionType.ListInit:
                    return ConstantFolding.FoldListInit((ListInitExpression)inputExpression);
                default:
                    throw new DocumentQueryException(string.Format(CultureInfo.CurrentUICulture,
                    "Unhandled expression type: '{0}'", inputExpression.NodeType));
            }
        }