std::ostreambuf_iterator

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std::ostreambuf_iterator

Member functions
ostreambuf_iterator::ostreambuf_iterator
ostreambuf_iterator::operator=
ostreambuf_iterator::operator*
ostreambuf_iterator::operator++ostreambuf_iterator::operator++(int)
ostreambuf_iterator::failed

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Defined in header`<iterator>`
template<class CharT,class Traits=std::char_traits<CharT>> class ostreambuf_iterator :publicstd::iterator<std::output_iterator_tag,void,void,void,void>		(until C++17)
template<class CharT,class Traits=std::char_traits<CharT>> class ostreambuf_iterator;		(since C++17)

std::ostreambuf_iterator is a single-passLegacyOutputIterator that writes successive characters into thestd::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 thestd::ostreambuf_iterator is a no-op.

In a typical implementation, the only data members ofstd::ostreambuf_iterator are a pointer to the associatedstd::basic_streambuf and a boolean flag indicating if the end of file condition has been reached.

[edit]Member types

Member type Definition

iterator_category std::output_iterator_tag

value_type void

difference_type

void	(until C++20)
std::ptrdiff_t	(since C++20)

pointer void

reference void

char_type CharT

traits_type Traits

streambuf_type std::basic_streambuf<CharT, Traits>

ostream_type std::basic_ostream<CharT, Traits>

Member typesiterator_category,value_type,difference_type,pointer andreference are required to be obtained by inheriting fromstd::iterator<std::output_iterator_tag,void,void,void,void>.

(until C++17)

[edit]Member functions

(constructor)	constructs a new`ostreambuf_iterator` (public member function)[edit]
(destructor) (implicitly declared)	destructs an`ostreambuf_iterator` (public member function)[edit]
operator=	writes a character to the associated output sequence (public member function)[edit]
operator*	no-op (public member function)[edit]
operator++operator++(int)	no-op (public member function)[edit]
failed	tests if output failed (public member function)[edit]

[edit]Example

Run this code

#include <algorithm>#include <iostream>#include <iterator>#include <string> 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

istreambuf_iterator	input iterator that reads fromstd::basic_streambuf (class template)[edit]
ostream_iterator	output iterator that writes tostd::basic_ostream (class template)[edit]

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std::ostreambuf_iterator

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