/// <summary>
/// Evaluates the current input as a list
/// </summary>
/// <returns></returns>
public ListExpression EvaluateList()
{
ListExpression retVal = null;
SkipWhiteSpaces();
int start = Index;
if (LookAhead("["))
{
Match("[");
List<Expression> list = new List<Expression>();
if (LookAhead("]"))
{
Match("]");
retVal = new ListExpression(Root, RootLog, list, start, Index);
}
else
{
bool findListEntries = true;
while (findListEntries)
{
Expression expression = Expression(0);
if (expression != null)
{
list.Add(expression);
if (LookAhead(","))
{
Match(",");
continue;
}
if (LookAhead("]"))
{
Match("]");
retVal = new ListExpression(Root, RootLog, list, start, Index);
findListEntries = false;
}
else
{
RootLog.AddError("] expected");
findListEntries = false;
}
}
else
{
RootLog.AddError("Cannot parse expression");
findListEntries = false;
}
}
}
}
if (retVal == null)
{
Index = start;
}
return retVal;
}
/// <summary>
/// Visits a List expression
/// </summary>
/// <param name="listExpression"></param>
protected virtual void VisitListExpression(ListExpression listExpression)
{
foreach (Expression expression in listExpression.ListElements)
{
if (expression != null)
{
VisitExpression(expression);
}
}
}
/// <summary>
/// Evaluates the current input as a list
/// </summary>
/// <param name="root">the root element for which this list is built</param>
/// <returns></returns>
public ListExpression EvaluateList()
{
ListExpression retVal = null;
int backup = Index;
if (LookAhead("["))
{
Match("[");
List<Expression> list = new List<Expression>();
Types.Type elementType = null;
if (LookAhead("]"))
{
Match("]");
retVal = new ListExpression(Root, list);
}
else
{
bool cont = true;
while (cont)
{
Expression expression = Expression(0);
if (expression != null)
{
list.Add(expression);
if (LookAhead(","))
{
Match(",");
continue;
}
else if (LookAhead("]"))
{
Match("]");
retVal = new ListExpression(Root, list);
break;
}
else
{
Root.AddError("] expected");
break;
}
}
else
{
Root.AddError("Cannot parse expression");
break;
}
}
}
}
if (retVal == null)
{
Index = backup;
}
return retVal;
}