24 Iterators library [iterators]

24.6 Stream iterators [stream.iterators]

24.6.5 Class template ostreambuf_iterator [ostreambuf.iterator]

24.6.5.1 General [ostreambuf.iterator.general]

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The class template ostreambuf_iterator writes successive characters onto the output stream from which it was constructed.
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namespace std { template<class charT, class traits = char_traits<charT>> class ostreambuf_iterator { public: using iterator_category = output_iterator_tag; using value_type = void; using difference_type = ptrdiff_t; using pointer = void; using reference = void; using char_type = charT; using traits_type = traits; using streambuf_type = basic_streambuf<charT,traits>; using ostream_type = basic_ostream<charT,traits>; ostreambuf_iterator(ostream_type& s) noexcept; ostreambuf_iterator(streambuf_type* s) noexcept; ostreambuf_iterator& operator=(charT c); ostreambuf_iterator& operator*(); ostreambuf_iterator& operator++(); ostreambuf_iterator& operator++(int); bool failed() const noexcept; private: streambuf_type* sbuf_; // exposition only }; }

24.6.5.2 Constructors [ostreambuf.iter.cons]

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ostreambuf_iterator(ostream_type& s) noexcept;
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Preconditions: s.rdbuf() is not a null pointer.
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Effects: Initializes sbuf_ with s.rdbuf().
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ostreambuf_iterator(streambuf_type* s) noexcept;
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Preconditions: s is not a null pointer.
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Effects: Initializes sbuf_ with s.

24.6.5.3 Operations [ostreambuf.iter.ops]

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ostreambuf_iterator& operator=(charT c);
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Effects: If failed() yields false, calls sbuf_->sputc(c); otherwise has no effect.
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Returns: *this.
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ostreambuf_iterator& operator*();
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Returns: *this.
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ostreambuf_iterator& operator++(); ostreambuf_iterator& operator++(int);
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Returns: *this.
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bool failed() const noexcept;
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Returns: true if in any prior use of member operator=, the call to sbuf_->sputc() returned traits​::​eof(); or false otherwise.
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