protected virtual void AfterVisit(QilNode node) {
QilExpression qil;
switch (node.NodeType) {
case QilNodeType.QilExpression:
// Remove all global functions, variables, and parameters from scope
qil = (QilExpression) node;
foreach (QilNode func in qil.FunctionList) EndScope(func);
foreach (QilNode var in qil.GlobalVariableList) EndScope(var);
foreach (QilNode param in qil.GlobalParameterList) EndScope(param);
break;
case QilNodeType.Function:
// Remove all formal arguments from scope
foreach (QilNode arg in ((QilFunction) node).Arguments) EndScope(arg);
break;
case QilNodeType.Loop:
case QilNodeType.Filter:
case QilNodeType.Sort:
// Remove loop iterator in scope
EndScope(((QilLoop) node).Variable);
break;
}
}