pgLab/pglablib/sqlast/BuildStandardItemTreeModelNodeVisitor.cpp

#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)
{
}