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experimental::ostream_joiner | ||||
Defined in header <experimental/iterator> | ||
template< class DelimT, | (library fundamentals TS v2) | |
std::experimental::ostream_joiner is a single-passLegacyOutputIterator that writes successive objects into thestd::basic_ostream object for which it was constructed, usingoperator<<, separated by a delimiter. The delimiter is written to the output stream between every two objects that are written. The write operation is performed when the iterator (whether dereferenced or not) is assigned to. Incrementing theostream_joiner is a no-op.
In a typical implementation, the only data members ofostream_joiner are a pointer to the associatedstd::basic_ostream, the delimiter, and abool member that indicates whether the next write is for the first element in the sequence.
Compared tostd::ostream_iterator,ostream_joiner prints the delimiter sequence one fewer time, and is not templated on the type of the object to be printed.
Contents |
| Member type | Definition |
char_type | CharT |
traits_type | Traits |
ostream_type | std::basic_ostream<CharT, Traits> |
value_type | void |
difference_type | void |
pointer | void |
reference | void |
iterator_category | std::output_iterator_tag |
constructs a newostream_joiner(public member function)[edit] | |
(destructor) (implicitly declared) | destructs anostream_joiner(public member function)[edit] |
| writes an object to the associated output sequence (public member function)[edit] | |
| no-op (public member function)[edit] | |
| no-op (public member function)[edit] |
creates anostream_joiner object, deducing the template's type arguments from the function arguments(function template)[edit] |
#include <algorithm>#include <experimental/iterator>#include <iostream>#include <iterator> int main(){int i[]={1,2,3,4,5};std::copy(std::begin(i),std::end(i),std::experimental::make_ostream_joiner(std::cout,", "));}
Output:
1, 2, 3, 4, 5
| output iterator that writes tostd::basic_streambuf (class template)[edit] | |
| output iterator that writes tostd::basic_ostream (class template)[edit] | |
| input iterator that reads fromstd::basic_istream (class template)[edit] |
