NAME¶

std::time_put_byname - std::time_put_byname

Synopsis¶

Defined in header <locale>
template<

class CharT,
class OutputIt = std::ostreambuf_iterator<CharT>

> class time_put_byname : public std::time_put<CharT, OutputIt>;

std::time_put_byname is a std::time_put facet which encapsulates time and date
formatting rules of the locale specified at its construction.

Specializations¶

The standard library is guaranteed to provide every specialization that satisfies
the following type requirements:

* CharT is one of char and wchar_t, and
* OutputIt must meet the requirements of LegacyOutputIterator.

Member types¶

Member type Definition
char_type CharT
iter_type OutputIt

Member functions¶

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

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 = (since C++11)
0 );

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

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<CharT,OutputIt>)

Protected member functions¶

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

Example¶

Prints current time using the "C" locale with the time_put facet replaced by various
std::time_put_byname facets. The result shown was obtained using the clang compiler.

// Run this code

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

int main()
{
std::time_t t = std::time(nullptr);
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.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>("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 2023年10月05日 19時44分51秒
Четверг Чт 05 окт 2023 19:44:51
torsdag tor 5 okt 2023 19:44:51

See also¶

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