NAME¶

std::ostream_iterator::ostream_iterator - std::ostream_iterator::ostream_iterator

Synopsis¶

ostream_iterator( ostream_type& stream, const CharT* delim ); (1)
ostream_iterator( ostream_type& stream ); (2)

Constructs the iterator with stream as the associated stream, by storing the address
of stream.

1) Uses delim as the delimiter.
2) Uses a null pointer as the delimiter.

Parameters¶

stream - the output stream to be accessed by this iterator
delim - the null-terminated character string to be inserted into the stream after
each output

Example¶

// Run this code

#include <algorithm>
#include <iostream>
#include <iterator>
#include <numeric>

int main()
{
std::ostream_iterator<char> oo{std::cout};
std::ostream_iterator<int> i1{std::cout, ", "};
std::fill_n(i1, 5, -1);
*oo++ = '\n';

std::ostream_iterator<double> i2{std::cout, "; "};
*i2++ = 3.14;
*i2++ = 2.71;
*oo++ = '\n';

std::common_iterator<std::counted_iterator<std::ostream_iterator<float>>,
std::default_sentinel_t>
first{std::counted_iterator{std::ostream_iterator<float>{std::cout," ~ "}, 5}},
last{std::default_sentinel};
std::iota(first, last, 2.2);
*oo++ = '\n';
}

Output:¶

-1, -1, -1, -1, -1,
3.14; 2.71;
2.2 ~ 3.2 ~ 4.2 ~ 5.2 ~ 6.2 ~

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 1280 C++98 stream was stored directly stores its address
instead
default constructor was provided as removed along with
P2325R3 C++20 C++20 the requirement
iterators must be default_initializable