std::istream_iterator::istream_iterator

 

C++

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Iterator library

Iterator primitives
iterator_traits
input_iterator_tag output_iterator_tag forward_iterator_tag bidirectional_iterator_tag random_access_iterator_tag
iterator
Iterator adaptors
reverse_iterator
move_iterator (C++11) back_insert_iterator front_insert_iterator insert_iterator	make_move_iterator (C++11) back_inserter front_inserter inserter
Stream iterators
istream_iterator
ostream_iterator
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ostreambuf_iterator
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begin (C++11)
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std::istream_iterator

Member functions

istream_iterator::istream_iterator

istream_iterator::operator* istream_iterator::operator->

istream_iterator::operator++ istream_iterator::operator++(int)

Non-member functions

operator== operator!=

 

istream_iterator(); constexpr istream_iterator();	(1)	(since C++11, only if T is literal type)
istream_iterator(istream_type& stream);	(2)
istream_iterator(const istream_iterator& other) = default;	(3)

1) Constructs the end-of-stream iterator.

2) Initializes the iterator and stores the address of stream in a data member. Optionally, performs the first read from the input stream to initialize the cached value data member (although it may be delayed until the first access)

3) Constructs a copy of other. If T is a literal type, this copy constructor is a trivial copy constructor.

Parameters

stream	-	stream to initialize the istream_iterator with
other	-	another istream_iterator of the same type

Examples

run this code

#include <iostream>
#include <iterator>
#include <algorithm>
#include <sstream>
int main()
{
    std::istringstream stream("1 2 3 4 5");
    std::copy(
        std::istream_iterator<int>(stream),
        std::istream_iterator<int>(),
        std::ostream_iterator<int>(std::cout, " ")
    );
}

Output:

1 2 3 4 5