#pragma once

namespace sqlast {

    class SelectItem;
    class SelectList;
    class SelectStatement;
    class StatementList;
    class StringLiteral;

    class NodeVisitor
    {
    public:
        virtual ~NodeVisitor() = default;

        virtual void Visit(SelectItem &selectItem) = 0;
        virtual void Visit(SelectList &selectList) = 0;
        virtual void Visit(SelectStatement &selectStatement) = 0;
        virtual void Visit(StatementList &statementList) = 0;
        virtual void Visit(StringLiteral &stringLiteral) = 0;

    protected:
        void VisitSelectListItems(SelectList &selectList);

    };

}