std::time_put_byname (3) - Linux Manuals

std::time_put_byname: std::time_put_byname


std::time_put_byname - std::time_put_byname


Defined in header <locale>
template< class CharT, class OutputIterator = std::ostreambuf_iterator<CharT> >
class time_put_byname : public std::time_put<CharT, OutputIterator>;

std::time_put_byname is a std::time_put facet which encapsulates time and date formatting rules of the locale specified at its construction.
Two specializations are provided by the standard library

Defined in header <locale>
std::time_put_byname<char, OutputIterator> narrow/multibyte time formatting
std::time_put_byname<wchar_t, OutputIterator> wide string time formatting

Member types

Member type Definition
char_type CharT
iter_type OutputIterator

Member functions

              constructs a new time_put_byname facet
constructor (public member function)
              destroys a time_put_byname facet
destructor (protected member function)


explicit time_put_byname( const char* name, std::size_t refs = 0 );
explicit time_put_byname( const std::string& name, std::size_t refs = 0 ); (since C++11)

Constructs a new std::time_put_byname facet for a locale with name.
refs is used for resource management: if refs == 0, the implementation destroys the facet, when the last std::locale object holding it is destroyed. Otherwise, the object is not destroyed.


name - the name of the locale
refs - the number of references that link to the facet



Destroys the facet.

Inherited from std::time_put

Member objects

Member name Type
id (static) std::locale::id

Member functions

    invokes do_put
put (public member function of std::time_put<CharT,OutputIt>)

Protected member functions

do_put formats date/time and writes to output stream
          (virtual protected member function of std::time_put<CharT,OutputIt>)


This example prints current time using the "C" locale with the time_put facet replaced by various time_put_byname facets
// Run this code

  #include <iostream>
  #include <ctime>
  #include <iomanip>
  #include <codecvt>

  int main()
      std::time_t t = std::time(NULL);
      std::wbuffer_convert<std::codecvt_utf8<wchar_t>> conv(std::cout.rdbuf());
      std::wostream out(&conv);

                            new std::time_put_byname<wchar_t>("ja_JP")));
      out << std::put_time(std::localtime(&t), L"%A %c") << '\n';

                           new std::time_put_byname<wchar_t>("ru_RU.utf8")));
      out << std::put_time(std::localtime(&t), L"%A %c") << '\n';

                           new std::time_put_byname<wchar_t>("sv_SE.utf8")));
      out << std::put_time(std::localtime(&t), L"%A %c") << '\n';

Possible output:

  木曜日 2012年08月09日 21時41分02秒
  Четверг Чт. 09 авг. 2012 21:41:02
  torsdag tor 9 aug 2012 21:41:02

See also

         formats contents of struct std::tm for output as character sequence
time_put (class template)