internal static System.Linq.Expressions.Expression TransformUnaryExpression(this IQueryVisitor visitor, System.Linq.Expressions.Expression sourceExpression)
{
System.Linq.Expressions.Expression result = sourceExpression;
if (sourceExpression is System.Linq.Expressions.UnaryExpression)
{
System.Linq.Expressions.UnaryExpression unaryExpression = (System.Linq.Expressions.UnaryExpression)sourceExpression;
if (unaryExpression.NodeType == System.Linq.Expressions.ExpressionType.TypeAs)
{
System.Linq.Expressions.Expression expression = visitor.TransformPredicateExpression(unaryExpression.Operand);
if (expression != sourceExpression)
{
object item;
if (!TransformedExpressionsCache.TryGetValue(sourceExpression, out item))
{
TransformedExpressionsCache[sourceExpression] = result = expression;
}
else
{
result = (System.Linq.Expressions.Expression)item;
}
}
}
}
return(result);
}
