std::ostreambuf_iterator
Defined in header
<iterator>
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||
template< class CharT, class Traits = std::char_traits<CharT> >
class ostreambuf_iterator : public std::iterator<std::output_iterator_tag, |
(until C++17) | |
template< class CharT, class Traits = std::char_traits<CharT> >
class ostreambuf_iterator; |
(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.
Contents |
[edit] Member types
Member type | Definition |
char_type
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CharT
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traits_type
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Traits
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streambuf_type
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std::basic_streambuf<CharT, Traits> |
ostream_type
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std::basic_ostream<CharT, Traits> |
[edit] Member functions
constructs a new ostreambuf_iterator (public member function) |
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(destructor)
(implicitly declared)
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destructs an ostreambuf_iterator (public member function) |
writes a character to the associated output sequence (public member function) |
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no-op (public member function) |
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no-op (public member function) |
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tests if output failed (public member function) |
[edit] Member types
Member type | Definition |
value_type
|
void |
difference_type
|
void |
pointer
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void |
reference
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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>.
[edit] Example
#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:
This is an example
[edit] See also
input iterator that reads from std::basic_streambuf (class template) |
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output iterator that writes to std::basic_ostream (class template) |