[classad-users] ExprTree , ExprTreeList, Literal , Value

[Alessandro Maraschini <alessandro.maraschini@xxxxxxxxxx>]

Hi,
I'm having some problems while trying to make conversion between Exptree
and Value using ExprTreeList class using ClassAd C++ 0.9.1 Version
Well I have an ExprList instance and I'd like to append a new Value
val.
The solution I found is the following:
const ExprList    *el;
vector<ExprTree*>    vect;
Value val ;
[...]
el-> GetComponents(vect);                              
// obtain the components of the expression list
Literal   *lit = Literal::MakeLiteral (val);        
// convert the Value into a Literal
vect.push_back(   (ExprTree*) lit  );                
// Append the Literal to the vector
el= ExprList::MakeExprList(vect);                 
//Re-generate the ExprList from the vector
but I really don't like it.
Moreover, if I had to Insert an ExprList into a ClassAd  instanceI
should do the following :
Value           
valueToInsert ;
valueToInsert.SetListValue(el)                        
//Create a Value instance of ExprList type
Literal   *lit = Literal::MakeLiteral (valueToInsert);        
//converts the Value into a Literal
someClassAd.Insert( some_string   ,   (ExprTree*)
lit);   //Insert  into a ClassAd
That doesn't seem to me quite a good solution...
Is there any other methods/classes available that I can use instead?
Thank you,
         Alex