NAME¶

std::time_get - std::time_get

Synopsis¶

Defined in header <locale>
template<

class CharT,
class InputIt = std::istreambuf_iterator<CharT>

> class time_get;

Class template std::time_get encapsulates date and time parsing rules. The I/O
manipulator std::get_time uses the std::time_get facet of the I/O stream's locale to
convert text input to a std::tm object.

std-time get-inheritance.svg

Inheritance diagram

If a std::time_get specialization is not guaranteed to be provided by the standard
library (see below), the behaviors of its member functions (except the constructor
and destructor) 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_get<char> parses narrow string representations of date and time
std::time_get<wchar_t> parses 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
* InputIt must meet the requirements of LegacyInputIterator.

Member types¶

Member type Definition
char_type CharT
iter_type InputIt

Member functions¶

constructor constructs a new time_get facet
(public member function)
destructor destructs a time_get facet
(protected member function)
date_order invokes do_date_order
(public member function)
get_time invokes do_get_time
(public member function)
get_date invokes do_get_date
(public member function)
get_weekday invokes do_get_weekday
(public member function)
get_monthname invokes do_get_monthname
(public member function)
get_year invokes do_get_year
(public member function)
get invokes do_get
(C++11) (public member function)

Member objects¶

static std::locale::id id id of the locale
(public member object)

Protected member functions¶

do_date_order obtains preferred ordering of day, month, and year
[virtual] (virtual protected member function)
do_get_time extracts hours, minutes, and seconds from input stream
[virtual] (virtual protected member function)
do_get_date extracts month, day, and year from input stream
[virtual] (virtual protected member function)
do_get_weekday extracts the name of a day of the week from input stream
[virtual] (virtual protected member function)
do_get_monthname extracts a month name from input stream
[virtual] (virtual protected member function)
do_get_year extracts a year from input stream
[virtual] (virtual protected member function)
do_get extracts date/time components from input stream, according to the
[virtual] (C++11) specified format
(virtual protected member function)

Inherited from std::time_base

Type Definition
dateorder date order enumeration type, defining the values no_order, dmy, mdy, ymd,
and ydm

Example¶

Note: choose clang to observe the output. libstdc++ does not correctly implement
the %b specifier: bug 78714.

// Run this code

#include <iomanip>
#include <iostream>
#include <locale>
#include <sstream>

int main()
{
std::tm t = {};
std::istringstream ss("2011-Februar-18 23:12:34");
ss.imbue(std::locale("de_DE.utf-8"));

ss >> std::get_time(&t, "%Y-%b-%d %H:%M:%S");
if (ss.fail())
std::cout << "Parse failed\n";
else
std::cout << std::put_time(&t, "%c") << '\n';
}

Possible output:¶

Sun Feb 18 23:12:34 2011

See also¶

time_put formats contents of std::tm for output as character sequence
(class template)
get_time parses a date/time value of specified format
(C++11) (function template)