private static ConditionalExpression BubbleUpOrs(ConditionalExpression condition)
{
bool modified = false;
bool hasChildOr = false;
ConditionalExpression left = condition.Left as ConditionalExpression;
if (left != null)
{
left = BubbleUpOrs(left);
modified |= !ReferenceEquals(left, condition.Left);
hasChildOr |= (left.Operation == ConditionalOperation.Or);
}
ConditionalExpression right = condition.Right as ConditionalExpression;
if (right != null)
{
right = BubbleUpOrs(right);
modified |= !ReferenceEquals(right, condition.Right);
hasChildOr |= (right.Operation == ConditionalOperation.Or);
}
if (modified)
{
var newCondition = new ConditionalExpression(
left ?? condition.Left, condition.Operation, right ?? condition.Right);
condition.CopyLocation(newCondition);
condition = newCondition;
}
if (condition.Operation == ConditionalOperation.And && hasChildOr)
{
var orConditions = new List <ExpressionBase>();
orConditions.Add(left ?? condition.Left);
orConditions.Add(right ?? condition.Right);
var expression = CrossMultiplyOrConditions(orConditions);
return((ConditionalExpression)expression);
}
return(condition);
}
private static ConditionalExpression BubbleUpOrs(ConditionalExpression condition)
{
bool modified = false;
bool hasChildOr = false;
var conditions = condition.Conditions.ToList();
for (int i = 0; i < conditions.Count; ++i)
{
ConditionalExpression clause = conditions[i] as ConditionalExpression;
if (clause != null)
{
clause = BubbleUpOrs(clause);
if (!ReferenceEquals(clause, conditions[i]))
{
conditions[i] = clause;
modified = true;
}
hasChildOr |= (clause.Operation == ConditionalOperation.Or);
}
}
if (modified)
{
var newCondition = new ConditionalExpression(condition.Operation, conditions);
condition.CopyLocation(newCondition);
condition = newCondition;
}
if (condition.Operation == ConditionalOperation.And && hasChildOr)
{
var orConditions = new List <ExpressionBase>();
orConditions.AddRange(conditions);
var expression = CrossMultiplyOrConditions(orConditions);
return((ConditionalExpression)expression);
}
return(condition);
}