std::ostream_iterator<T,CharT,Traits>::ostream_iterator
ostream_iterator( ostream_type& stream, const CharT* delim ); |
(1) | |
ostream_iterator( ostream_type& stream ); |
(2) |
1) Constructs the iterator with
stream as the associated stream and
delim as the delimiter.
2) Constructs the iterator with
stream as the associated stream and 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
#include <iostream>
#include <iterator>
#include <algorithm>
#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 |
|---|---|---|---|
| P2325R3 | C++20 | default constructor was provided as C++20 iterators must be default_initializable |
removed along with the requirement |
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