std::ostreambuf_iterator<CharT,Traits>::ostreambuf_iterator
From cppreference.com
| (1) | ||
ostreambuf_iterator( streambuf_type* buffer ) throw();
|
(until C++11) | |
ostreambuf_iterator( streambuf_type* buffer ) noexcept;
|
(since C++11) | |
| (2) | ||
ostreambuf_iterator( ostream_type& stream ) throw();
|
(until C++11) | |
ostreambuf_iterator( ostream_type& stream ) noexcept;
|
(since C++11) | |
1) Constructs the iterator with the private
streambuf_type* member set to buffer and the failed() flag set to false. The behavior is undefined if buffer is a null pointer.2) Same as
ostreambuf_iterator(stream.rdbuf()).Parameters
| stream | - | the output stream whose rdbuf() will be accessed by this iterator
|
| buffer | - | the output stream buffer to be accessed by this iterator |
Example
Run this code
#include <fstream>
#include <iostream>
#include <iterator>
int main()
{
const char* file = "test.txt";
{
std::basic_filebuf<char> f;
f.open(file, std::ios::out);
std::ostreambuf_iterator<char> out1(&f);
*out1 = 'a'; // writes to file via iterator
}
// read back from the file
char a;
std::cout << ((std::ifstream{file} >> a), a) << std::endl;
std::ostreambuf_iterator<wchar_t> out2{std::wcout};
*out2 = L'b';
}
Output:
a
b
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.