// Evaluate and print an expression tree.
public static void Print(VsaEngine engine, JNode expr)
{
if(expr is JArgList)
{
Print(engine, ((JArgList)expr).expr1);
Print(engine, ((JArgList)expr).expr2);
}
else
{
Object value = expr.Eval(engine);
String pvalue;
if(value is ArrayObject)
{
pvalue = ArrayPrototype.join(value, String.Empty);
}
else
{
pvalue = Convert.ToString(value);
}
if(pvalue != null)
{
ScriptStream.WriteLine(pvalue);
}
}
}
// Evaluate an argument list.
private static int EvalArgs(Object[] args, int posn, JNode node,
VsaEngine engine)
{
if(node == null)
{
return posn;
}
else if(!(node is JArgList))
{
args[posn] = node.Eval(engine);
return posn + 1;
}
else
{
posn = EvalArgs(args, posn, ((JArgList)node).expr1, engine);
args[posn] = (((JArgList)node).expr2).Eval(engine);
return posn + 1;
}
}