24 Iterators library [iterators]

24.6 Stream iterators [stream.iterators]

24.6.3 Class template istreambuf_iterator [istreambuf.iterator]

24.6.3.2 istreambuf_iterator constructors [istreambuf.iterator.cons]

For each istreambuf_iterator constructor in this section, an end-of-stream iterator is constructed if and only if the exposition-only member sbuf_ is initialized with a null pointer value.

constexpr istreambuf_iterator() noexcept;

Effects: Initializes sbuf_ with nullptr.

istreambuf_iterator(istream_type& s) noexcept;

Effects: Initializes sbuf_ with s.rdbuf().

istreambuf_iterator(streambuf_type* s) noexcept;

Effects: Initializes sbuf_ with s.

istreambuf_iterator(const proxy& p) noexcept;

Effects: Initializes sbuf_ with p.sbuf_.