std::time_put<CharT,OutputIt>:: put, std::time_put<CharT,OutputIt>:: do_put

Converts the calendar date and time stored in the std::tm object pointed to by t into a character string, according to the format string [fmtbeg, fmtend) . The format string is the same as used by std:: strftime , but each format specifier is processed by an individual call to do_put() , which can be customized by extending this facet.

Parameters

Format string

The format string consists of zero or more conversion specifiers and ordinary characters (except % ). All ordinary characters, including the terminating null character, are copied to the output string without modification. Each conversion specification begins with % character, optionally followed by E or O modifier (ignored if unsupported by the locale), followed by the character that determines the behavior of the specifier. The following format specifiers are available:

Return value

Iterator pointing one past the last character that was produced.

Notes

No error handling is provided.

The fill character is provided for those implementation-defined format specifiers and for the user-defined overrides of do_put() that use padding and filling logic. Such implementations typically make use of the formatting flags from str .

Example

#include <iostream>
#include <sstream>
#include <iomanip>
#include <ctime>
 
void try_time_put(const std::tm* t, const std::string& fmt)
{
    std::cout.imbue(std::locale());
    std::cout << "In the locale '" << std::cout.getloc().name() << "' : '";
 
    std::use_facet<std::time_put<char>>(std::cout.getloc()).put(
        {std::cout}, std::cout, ' ', t, &fmt[0], &fmt[0] + fmt.size());
 
    std::cout << "'\n";
}
 
int main()
{
    std::time_t t = std::time(NULL);
    std::tm tm = *std::localtime(&t);
 
    std::string fmt = "%c";
    std::cout << "Using the format string '" << fmt
              << "' to format the time: " << std::ctime(&t) << '\n';
 
    std::locale::global(std::locale("de_DE.utf8"));
    try_time_put(&tm, fmt);
 
    std::locale::global(std::locale("el_GR.utf8"));
    try_time_put(&tm, fmt);
 
    std::locale::global(std::locale("ja_JP.utf8"));
    try_time_put(&tm, fmt);
}

Using the format string '%c' to format the time: Mon Feb 11 22:58:50 2013
 
In the locale 'de_DE.utf8' : 'Mo 11 Feb 2013 23:02:38 EST'
In the locale 'el_GR.utf8' : 'Δευ 11 Φεβ 2013 11:02:38 μμ EST'
In the locale 'ja_JP.utf8' : '2013年02月11日 23時02分38秒'

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

See also