wip

pglablib/sqlast/BuildStandardItemTreeModelNodeVisitor.cpp

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+#include "BuildStandardItemTreeModelNodeVisitor.h"
+
+using namespace sqlast;
+
+namespace {
+
+    template <class T>
+    class AutoRevert {
+    public:
+        AutoRevert(T& var, const T newValue)
+            : variable(var)
+            , previousValue(var)
+        {
+            variable = std::move(newValue);
+        }
+
+        AutoRevert(T& var, const T&& newValue)
+            : variable(var)
+            , previousValue(var)
+        {
+            variable = std::move(newValue);
+        }
+
+        ~AutoRevert()
+        {
+            variable = std::move(previousValue);
+        }
+
+        AutoRevert(const AutoRevert&) = delete;
+        AutoRevert operator=(const AutoRevert&) = delete;
+
+    private:
+        T& variable;
+        T previousValue;
+    };
+
+    template<class T>
+    AutoRevert<T> MakeAutoRevert(T& var, const T newValue)
+    {
+        return AutoRevert<T>(var, newValue);
+    }
+}
+
+BuildStandardItemTreeModelNodeVisitor::BuildStandardItemTreeModelNodeVisitor()
+    : model(std::make_unique<QStandardItemModel>())
+    , currentParent(model->invisibleRootItem())
+{
+}
+
+void BuildStandardItemTreeModelNodeVisitor::Visit(SelectItem &selectItem)
+{
+}
+
+void BuildStandardItemTreeModelNodeVisitor::Visit(SelectList &selectList)
+{
+}
+
+void BuildStandardItemTreeModelNodeVisitor::Visit(SelectStatement &selectStatement)
+{
+    auto item = new QStandardItem("SELECT");
+    currentParent->appendRow(item);
+    auto guard = MakeAutoRevert(currentParent, item);
+
+
+}
+
+void sqlast::BuildStandardItemTreeModelNodeVisitor::Visit(StatementList &statementList)
+{
+}