std::ostreambuf_iterator::failed
From cppreference.com
                    
                                        
                    < cpp | iterator | ostreambuf iterator
                    
                                                            
                    | bool failed() const | ||
Returns true if the iterator encountered the end-of-file condition, that is, if an earlier call to std::basic_streambuf::sputc (made by operator=) returned Traits::eof .
| Contents | 
[edit] Parameters
(none)
[edit] Return value
true if this iterator has encountered the end-of-file condition on output, false otherwise.
[edit] Exceptions
| (none) | (until C++11) | 
| noexcept specification:   noexcept | (since C++11) | 
[edit] Example
| This section is incomplete | 


