Standard C/C++

Listing 4: <memory>, part 5

        // TEMPLATE CLASS _Temp_iterator
template<class T>
    class _Temp_iterator
        : public iterator<output_iterator_tag, void, void> {
    typedef T _FARQ *Pty;
public:
    _Temp_iterator(_PDFT n = 0)
        {const pair<Pty, _PDFT> pnpair =
///            get_temporary_buffer<T>(n);
            get_temporary_buffer(n, (Pty)0);    ///
        Buf.Begin = pnpair.first;
        Buf.Cur = pnpair.first;
        Buf.Hiwater = pnpair.first;
        Buf.Len = pnpair.second;
        Pb = &Buf; }
    _Temp_iterator(const _Temp_iterator<T>& x)
        {Buf.Begin = 0;
        Buf.Cur = 0;
        Buf.Hiwater = 0;
        Buf.Len = 0;
        *this = x; }
    ~_Temp_iterator()
        {if (Buf.Begin != 0)
            {for (Pty first = Buf.Begin;
                first != Buf.Hiwater; ++first)
                _Destroy(&*first);
            return_temporary_buffer(Buf.Begin); }}
    _Temp_iterator<T>& operator=(const _Temp_iterator<T>& x)
        {Pb = x.Pb;
        return (*this); }
    _Temp_iterator<T>& operator=(const T& val)
        {if (Pb->Cur < Pb->Hiwater)
            *Pb->Cur++ = val;
        else
            {_Construct(&*Pb->Cur, val);
            Pb->Hiwater = ++Pb->Cur; }
        return (*this); }
    _Temp_iterator<T>& operator*()
        {return (*this); }
    _Temp_iterator<T>& operator++()
        {return (*this); }
    _Temp_iterator<T>& operator++(int)
        {return (*this); }
    _Temp_iterator<T>& Init()
        {Pb->Cur = Pb->Begin;
        return (*this); }
    Pty First() const
        {return (Pb->Begin); }
    Pty Last() const
        {return (Pb->Cur); }
    _PDFT Maxlen() const
        {return (Pb->Len); }
private:
    struct Bufpar {
        Pty Begin;
        Pty Cur;
        Pty Hiwater;
        _PDFT Len;
        } Buf, *Pb;
    };
/* End of File */