queue.h

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#ifndef ZYPP_NG_SAT_QUEUE_H
#define ZYPP_NG_SAT_QUEUE_H

#include <iosfwd>

#include <zypp-core/Globals.h>
#include <zypp-core/base/PtrTypes.h>

#include <zypp/ng/sat/poolconstants.h>

namespace zyppng
{
  namespace sat
  {
    class Queue;
    using SolvableQueue = Queue;        
    using StringQueue = Queue;          

    class Queue
    {
      public:
        using size_type = unsigned int;
        using value_type = detail::IdType;
        using const_iterator = const value_type *;

      public:
        Queue();

        ~Queue();

        bool empty() const;
        size_type size() const;
        const_iterator begin() const;
        const_iterator end() const;

        const_iterator find( value_type val_r ) const;

        bool contains( value_type val_r ) const
        { return( find( val_r ) != end() ); }

        value_type first() const;

        value_type last() const;

        const value_type & at( size_type idx_r ) const;

        value_type & at( size_type idx_r );

        const value_type & operator[]( size_type idx_r ) const;

        value_type & operator[]( size_type idx_r );

        void clear();

        void remove( value_type val_r );

        void push( value_type val_r );
        void push_back( value_type val_r )
        { push( val_r ); }

        void pushUnique( value_type val_r );

        value_type pop();
        value_type pop_back()
        { return pop(); }

        void push_front( value_type val_r );

        value_type pop_front();

     public:
        operator detail::CQueue *();                    
        operator const detail::CQueue *() const         
        { return _pimpl.get(); }
      private:
        zypp::RWCOW_pointer<zypp::sat::detail::CQueue> _pimpl;          
    };

    bool operator==( const Queue & lhs, const Queue & rhs );

    inline bool operator!=( const Queue & lhs, const Queue & rhs )
    { return !( lhs == rhs ); }

  } // namespace sat
} // namespace zyppng

namespace zypp {
  template<> sat::detail::CQueue * rwcowClone<sat::detail::CQueue>( const sat::detail::CQueue * rhs );
}


#endif // ZYPP_NG_SAT_QUEUE_H