std::time_put

C++

Language

Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Filesystem library (C++17)

Technical Specifications

Localizations library

Locales and facets
locale
use_facet	has_facet
Character classification
isspace isblank (C++11) iscntrl isupper islower isalpha	isdigit ispunct isxdigit isalnum isprint isgraph
Conversions
toupper tolower	wstring_convert (C++11) wbuffer_convert (C++11)
Facet category base classes
ctype_base codecvt_base messages_base	time_base money_base
Facet categories
ctype ctype<char> codecvt collate messages time_get time_put	num_get num_put numpunct money_get money_put moneypunct
Locale-specific facets
ctype_byname codecvt_byname messages_byname collate_byname	time_get_byname time_put_byname numpunct_byname moneypunct_byname
Code conversion facets
codecvt_utf8 (C++11) codecvt_utf16 (C++11)	codecvt_utf8_utf16 (C++11) codecvt_mode (C++11)
C locale
setlocale localeconv lconv	LC_ALLLC_COLLATELC_CTYPELC_MONETARYLC_NUMERICLC_TIME

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

Type requirements

- OutputIt must meet the requirements of OutputIterator.

Specializations

Two standalone (locale-independent) full specializations and two partial specializations are provided by the standard library:

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
std::time_put<char, OutputIt>	creates narrow string representations of date and time using custom output iterator
std::time_put<wchar_t, OutputIt>	creates wide string representations of date and time using custom output iterator

In addition, every locale object constructed in a C++ program implements its own (locale-specific) versions of these specializations.

Member types

Member type	Definition
char_type	CharT
iter_type	OutputIt

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)

Member objects

static std::locale::id id

id of the locale (public member object)

Protected member functions

do_put [virtual]

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

Example

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("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:

 20111109 123205

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 struct std::tm (class template)
put_time (C++11)	formats and outputs a date/time value according to the specified format (function template)