| Defined in header <iterator> | ||||
|---|---|---|---|---|
| (until C++17) | |||
| (since C++17) |
std::ostreambuf_iterator is a single-pass OutputIterator that writes successive characters into the std::basic_streambuf object for which it was constructed. The actual write operation is performed when the iterator (whether dereferenced or not) is assigned to. Incrementing the std::ostreambuf_iterator is a no-op.
In a typical implementation, the only data members of std::ostreambuf_iterator are a pointer to the associated std::basic_streambuf and a boolean flag indicating if the the end of file condition has been reached.
Member types
| Member type | Definition |
|---|---|
char_type | CharT |
traits_type | Traits |
streambuf_type | std::basic_streambuf<CharT, Traits> |
ostream_type | std::basic_ostream<CharT, Traits> |
Member functions
constructs a new ostreambuf_iterator (public member function) | |
| (destructor) (implicitly declared) | destructs an ostreambuf_iterator (public member function) |
| operator=
| writes a character to the associated output sequence (public member function) |
| operator*
| no-op (public member function) |
| no-op (public member function) | |
| tests if output failed (public member function) |
Member types
| Member type | Definition |
|---|---|
value_type | void |
difference_type | void |
pointer | void |
reference | void |
iterator_category | std::output_iterator_tag |
Note: before C++17, these member types are required to be obtained by inheriting from std::iterator<std::output_iterator_tag,void,void,void,void>.
Example
1 2 3 4 5 6 7 8 9 10 | #include <string>#include <algorithm>#include <iterator>#include <iostream> int main(){ std::string s = "This is an example\n"; std::copy(s.begin(), s.end(), std::ostreambuf_iterator<char>(std::cout));} |
Output:
1 | This is an example |
See also
input iterator that reads from std::basic_streambuf (class template) | |
output iterator that writes to std::basic_ostream (class template) |
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