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# std::time_put_byname

From cppreference.com
< cpp‎ | locale

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

### [edit] Member types

Member type | Definition
`char_type` | `CharT`
`iter_type` | `OutputIterator`

### [edit] Member functions

(constructor) | constructs a new `time_put_byname` facet (public member function) [edit]
(destructor) | destroys a `time_put_byname` facet (protected member function) [edit]

[edit]

## std::time_put_byname::time_put_byname

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.

### Parameters

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

[edit]

## std::time_put_byname::~time_put_byname

protected: ~time_put_byname(); |  |

Destroys the facet.

## Inherited from std::time_put

### Member objects

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

### Member functions

put | invokes `do_put` (public member function of `std::time_put`) [edit]

### Protected member functions

do_put [virtual] | formats date/time and writes to output stream (virtual protected member function of `std::time_put`) [edit]

### [edit] Example

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);

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

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

        out.imbue(std::locale(out.getloc(),
                             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

### [edit] See also

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

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