Difference between revisions of "cpp/locale/time get"
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Revision as of 15:02, 15 June 2018
| Defined in header <locale>
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| template< class CharT, |
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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.
Inheritance diagram
Contents |
Type requirements
-InputIt must meet the requirements of LegacyInputIterator.
|
Specializations
Two standalone (locale-independent) full specializations and two partial specializations are provided by the standard library:
| 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 |
| std::time_get<char, InputIt> | parses narrow string representations of date and time using custom input iterator |
| std::time_get<wchar_t, InputIt> | parses wide string representations of date and time using custom input 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
|
InputIt
|
Member functions
| constructs a new time_get facet (public member function) | |
| destructs a time_get facet (protected member function) | |
invokes do_date_order (public member function) | |
invokes do_get_time (public member function) | |
invokes do_get_date (public member function) | |
invokes do_get_weekday (public member function) | |
invokes do_get_monthname (public member function) | |
invokes do_get_year (public member function) | |
| (C++11) |
invokes do_get (public member function) |
Member objects
| static std::locale::id id |
id of the locale (public member object) |
Protected member functions
| [virtual] |
obtains preferred ordering of day, month, and year (virtual protected member function) |
| [virtual] |
extracts hours, minutes, and seconds from input stream (virtual protected member function) |
| [virtual] |
extracts month, day, and year from input stream (virtual protected member function) |
| [virtual] |
extracts the name of a day of the week from input stream (virtual protected member function) |
| [virtual] |
extracts a month name from input stream (virtual protected member function) |
| [virtual] |
extracts a year from input stream (virtual protected member function) |
| [virtual] (C++11) |
extracts date/time components from input stream, according to the 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
Run this code
#include <iostream> #include <sstream> #include <string> #include <locale> #include <ctime> #include <iomanip> int main() { std::wstring input = L"2011-Februar-18 23:12:34"; std::tm t; std::wistringstream ss(input); ss.imbue(std::locale("de_DE")); ss >> std::get_time(&t, L"%Y-%b-%d %H:%M:%S"); // uses std::time_get<wchar_t> std::cout << std::asctime(&t); }
Output:
Sun Feb 18 23:12:34 2011
See also
| formats contents of std::tm for output as character sequence (class template) | |
| (C++11) |
parses a date/time value of specified format (function template) |
