std::time_put

 

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Locales and facets   Locales has_facet use_facet locale Facet category base classes ctype_base codecvt_base messages_base time_base money_base ctype facets ctype ctype<char> ctype_byname codecvt codecvt_byname numeric facets num_get num_put numpunct numpunct_byname collate facets collate collate_byname time facets time_get time_put time_get_byname time_put_byname

monetary facets money_get money_put moneypunct moneypunct_byname messages facets messages messages_byname Character classification and conversion Character classification isspace    iscntrl isupper islower    isalpha ispunct isdigit    isxdigit isalnum isblank (C++11) isprint isgraph Character conversions toupper    tolower String and stream conversions wstring_convert (C++11/17/26*) wbuffer_convert (C++11/17/26*) Unicode conversion facets codecvt_utf8 (C++11/17/26*) codecvt_utf16 (C++11/17/26*) codecvt_utf8_utf16 (C++11/17/26*) codecvt_mode (C++11/17/26*) C library locales LC_ALLLC_COLLATELC_CTYPELC_MONETARYLC_NUMERICLC_TIME    setlocale localeconv lconv

 

std::time_put

Member functions

time_put::time_put

time_put::~time_put

time_put::puttime_put::do_put

 

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

Class template std::time_put encapsulates date and time formatting rules. The I/O manipulator std::put_time uses the std::time_put facet of the I/O stream's locale to generate text representation of an std::tm object.

Inheritance diagram

If a std::time_put specialization is not guaranteed to be provided by the standard library (see below), the behaviors of its put() and do_put() are not guaranteed as specified.

Specializations

The standard library is guaranteed to provide the following specializations (they are required to be implemented by any locale object):

Defined in header <locale>
std::time_put<char>	creates narrow string representations of date and time
std::time_put<wchar_t>	creates wide string representations of date and time

In addition, the standard library is also 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.

Nested types

Type	Definition
char_type	CharT
iter_type	OutputIt

Data members

Member	Description
std::locale::id id [static]	the identifier of the facet

Member functions

(constructor)	constructs a new time_put facet (public member function)
(destructor)	destructs a time_put facet (protected member function)
put	invokes do_put (public member function)

Protected member functions

do_put [virtual]

formats date/time and writes to output stream (virtual protected member function)

Example

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("ja_JP.utf8"));
 
    // this I/O manipulator std::put_time uses std::time_put<wchar_t>
    out << std::put_time(std::localtime(&t), L"%A %c") << '\n';
}

Output:

水曜日 2011年11月09日 12時32分05秒

See also

time_put_byname	represents the system-supplied std::time_put for the named locale (class template)
time_get	parses time/date values from an input character sequence into std::tm (class template)
put_time (C++11)	formats and outputs a date/time value according to the specified format (function template)