std::istream_iterator<T,CharT,Traits,Distance>::operator*, operator->

From cppreference.com
const T& operator*() const;
(1)
const T* operator->() const;
(2)

Returns a pointer or a reference to the current element.

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

Parameters

(none)

Return value

A pointer or a reference to the current element.

Exceptions

(none)