std::istream_iterator<T,CharT,Traits,Distance>:: operator++, operator++ (int)

istream_iterator & operator ++ ( ) ;	(1)
istream_iterator operator ++ ( int ) ;	(2)

Reads a value from the underlying stream (using its operator>> ) and stores it into the iterator object. If the read fails (the underlying stream's fail() returns true ), the iterator becomes the end-of-stream iterator.

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

Parameters

(none)

Return value

Exceptions

May throw implementation-defined exceptions.

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 260	C++98	the return type of operator ++ ( int ) was istream_iterator&	corrected to istream_iterator
LWG 788	C++98	the underlying stream's operator void * was used to determine whether the read fails, but it was removed by the resolution of LWG issue 468	uses fail() instead
LWG 838	C++98	it was unclear whether end-of-stream iterators can be incremented	the behavior is undefined