uiterable.hpp

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class iterable {
    BY_ME(iterable)
 
protected:
    enum iterationType {
        NEXT,
        PREV,
        FORWARD,
        BACKWARD
    };
 
public:
    virtual ~iterable() {}
 
    virtual RSquare operator*() = 0;
    const RSquare operator*() const BY_CONST_FUNC(operator*())
 
    virtual nbool isEnd() const = 0;
 
    virtual nbool isReversed() const = 0;
 
    virtual void rel() = 0;
 
    virtual ncnt next(ncnt step) { return isReversed() ? stepBackward(step) : stepForward(step); }
 
    virtual ncnt prev(ncnt step) { return isReversed() ? stepForward(step) : stepBackward(step); }
 
    virtual ncnt stepForward(ncnt step) = 0;
    virtual ncnt stepBackward(ncnt step) = 0;
 
    virtual R get() = 0;
    const R get() const BY_CONST_FUNC(get())
 
    virtual nbool isFrom(const tucontainable& it) const = 0;
    nbool isFrom(const tucontainable* it) const BY_SIDE_FUNC(isFrom);
 
    virtual tucontainable<T, R, RSquare>* getContainer() = 0;
    const tucontainable<T, R, RSquare>* getContainer() const BY_CONST_FUNC(getContainer())
};