std::time_get(3)

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)