std::istreambuf_iterator::operator*, operator->

From cppreference.com
CharT operator*() const;
(1)
CharT* operator->() const;
(2) (since C++11)

Reads a single character.

1) Returns the result of sbuf_->sgetc() where sbuf_ is the stored stream buffer.
2) Returns a pointer to the result of operator*().

The behavior is undefined if the iterator is end-of-stream iterator.

[edit] Parameters

(none)

[edit] Return value

1) The value of the obtained character.
2) A pointer to the obtained character.

[edit] Exceptions

(none)