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std::time_put(3) C++ Standard Libary std::time_put(3)


std::time_put - std::time_put


Defined in header <locale>

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.

std-time put-inheritance.svg

Inheritance diagram

Type requirements

OutputIt must meet the requirements of LegacyOutputIterator.


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
std::time_put<wchar_t> creates wide string representations of date and
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 formats date/time and writes to output stream
[virtual] (virtual protected member function)


// Run this code

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

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


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)
parses time/date values from an input character sequence into struct
time_get std::tm
(class template)
put_time formats and outputs a date/time value according to the specified
(C++11) format
(function template)