squeue.hpp

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// +-------------------------------------------------------------------------+
// |               I__n__t__e__L__i__b           0.6.10 development          |
// | Copyright (c) Andrey Vikt. Stolyarov <crocodil_AT_croco.net> 2000-2007. |
// |                                                                         |
// | This is free software. The library part is available under              |
// |                               GNU LESSER GENERAL PUBLIC LICENSE v.2.1.  |
// | GNU LGPL v2.1 is found in docs/gnu_gpl2.txt,  or at  http://www.gnu.org |
// |     Please see also docs/readme.txt and visit http://www.intelib.org    |
// |                                                                         |
// | !!! THERE IS NO WARRANTY OF ANY KIND, NEITHER EXPRESSED NOR IMPLIED !!! |
// +-------------------------------------------------------------------------+




#ifndef INTELIB_SQUEUE_HPP_SENTRY
#define INTELIB_SQUEUE_HPP_SENTRY

#include "sexpress.hpp"
#include "iexcept.hpp"



class SQueue : public SReference {
    SExpressionCons *last;
public:

    SQueue();


    SQueue(const SReference &ref);

    ~SQueue() { /* the parent will do all the job */ }

    void InsertFirst(const SReference& item);
    void Append(const SReference& item);
    bool RemoveFirst();
    bool IsEmpty() const { return IsEmptyList(); }
    
    template <class Tp> SQueue& operator|(const Tp &t) 
        { Append(SReference(t)); return *this; }

    template <class Tp> SQueue& operator,(const Tp &t) 
        { Append(SReference(t)); return *this; }

    SExpressionCons *GetPtr() const
        { return static_cast<SExpressionCons*>(SReference::GetPtr()); }

private:
    SQueue(const SQueue &) {} // no copying!
    void operator=(const SQueue &) {} // no assigning!
};

#endif // sentry

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