25 Iterators library [iterators]

25.6 Stream iterators [stream.iterators]

25.6.5 Class template ostreambuf_iterator [ostreambuf.iterator] Operations [ostreambuf.iter.ops]

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