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