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
#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
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