private ExprSequenceIterator (ExprSequenceIterator other)
: base (other)
{
if (other.iter != null)
iter = other.iter.Clone ();
expr = other.expr;
contextSequence = other.contextSequence;
currentExprIndex = other.currentExprIndex;
}
public override XPathSequence Evaluate (XPathSequence iter, ExprSequence args)
{
for (int i = 0; i < Args.Length; i++)
iter.Context.PushVariable (Args [i].Name, args [i].Evaluate (iter));
XPathSequence seq = new ExprSequenceIterator (iter, expr);
for (int i = 0; i < Args.Length; i++)
iter.Context.PopVariable ();
return seq;
}
public override XPathSequence Evaluate (XPathSequence iter)
{
// FIXME: should move to iterator?
XPathSequence cond = new ExprSequenceIterator (iter, SwitchExpr);
XPathSequence ret = null;
foreach (CaseClause ccc in Cases) {
if (ccc.Type.Matches (cond)) {
if (ccc.VarName != XmlQualifiedName.Empty)
iter.Context.PushVariable (ccc.VarName, cond);
ret = ccc.Expr.Evaluate (iter);
// FIXME: The design should make sure that in-scope variables are held on actual iteration.
if (ccc.VarName != XmlQualifiedName.Empty)
iter.Context.PopVariable ();
return ret;
}
}
if (DefaultVarName != XmlQualifiedName.Empty)
iter.Context.PushVariable (DefaultVarName, cond);
ret = DefaultReturn.Evaluate (iter);
if (DefaultVarName != XmlQualifiedName.Empty)
iter.Context.PopVariable ();
return ret;
}
