std::time_get::date_order, std::time_get::do_date_order
From cppreference.com
| Defined in header <locale>
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| public: dateorder date_order() const; |
(1) | |
| protected: virtual dateorder do_date_order() const; |
(2) | |
1) Public member function, calls the protected virtual member function
do_date_order of the most derived class.2) Returns a value of type std::time_base::dateorder, which describes the default date format used by this locale (expected by get_date() and produced by std::strftime() with format specifier '%x').
The valid values (inherited from std::time_base) are:
no_order
|
the format contains variable items (week day, Julian day, etc), or this function is not implemented |
dmy
|
day, month, year (European locales) |
mdy
|
month, day, year (American locales) |
ymd
|
year, month, day (Asian locales) |
ydm
|
year, day, month (rare) |
Parameters
(none)
Return value
A value of type dateorder
Notes
This function is optional, it may return no_order in every case.
Example
Run this code
#include <iostream> #include <locale> void show_date_order() { std::time_base::dateorder d = std::use_facet<std::time_get<char>>( std::locale() ).date_order(); switch (d) { case std::time_base::no_order: std::cout << "no_order\n"; break; case std::time_base::dmy: std::cout << "day, month, year\n"; break; case std::time_base::mdy: std::cout << "month, day, year\n"; break; case std::time_base::ymd: std::cout << "year, month, day\n"; break; case std::time_base::ydm: std::cout << "year, day, month\n"; break; } } int main() { std::locale::global(std::locale("en_US.utf8")); std::cout << "In U.S. locale, the default date order is: "; show_date_order(); std::locale::global(std::locale("ja_JP.utf8")); std::cout << "In Japanese locale, the default date order is: "; show_date_order(); std::locale::global(std::locale("de_DE.utf8")); std::cout << "In German locale, the default date order is: "; show_date_order(); }
Output:
In U.S. locale, the default date order is: month, day, year In Japanese locale, the default date order is: year, month, day In German locale, the default date order is: day, month, year
See also
| [virtual] |
extracts month, day, and year from input stream (virtual protected member function) |
| defines date format constants (class) |