If the result is a single digit, it is prefixed with 0. Writes the ISO 8601 week of the year as a decimal number. If the result is less than four digits it is left-padded with 0 to four digits. Writes the ISO 8601 week-based year as a decimal number. If the result is a single digit it is prefixed by 0. Writes the last two decimal digits of the ISO 8601 week-based year. In ISO 8601 weeks begin with Monday and the first week of the year must satisfy the following requirements: The modified command %Ow writes the locale's alternative representation. Writes the weekday as a decimal number (0-6), where Sunday is 0. The modified command %Ou writes the locale's alternative representation. Writes the ISO weekday as a decimal number (1-7), where Monday is 1. Writes the locale's abbreviated weekday name. The modified command %Oe writes the locale's alternative representation. If the result is a single decimal digit, it is prefixed with a space. Writes the day of month as a decimal number. The modified command %Od writes the locale's alternative representation. ![]() ![]() If the result is a single decimal digit, it is prefixed with 0. The modified command %Om writes the locale's alternative representation. Writes the month as a decimal number (January is 01). Writes the locale's abbreviated month name. The modified command %EY writes the locale's alternative full year representation. The modified command %Ey writes the locale's alternative representation of offset from %EC (year only). ![]() The modified command %Oy writes the locale's alternative representation. Writes the last two decimal digits of the year. The modified command %EC writes the locale's alternative representation of the century. Writes the year divided by 100 using floored division. The following format specifiers are available: str ( ) to the output buffer with additional padding and adjustments as per format specifiers. If the chrono-spec is empty, the chrono object is formatted as if by streaming it to an object os of type std:: basic_ostringstream with the formatting locale (one of std:: locale :: classic ( ), the passed std::locale object, and std:: locale :: global ( )) imbued and copying os. Each conversion specifier is replaced by appropriate characters in the output as described below. Some conversion specifiers have a modified form in which an E or O modifier character is inserted after the % character. Each unmodified conversion specifier begins with a % character followed by a character that determines the behavior of the specifier. ![]() All ordinary characters are written to the output without modification. A chrono-spec must start with a conversion specifier. The chrono-spec consists of one or more conversion specifiers and ordinary characters (other than, and %). otherwise ( L is present but no std::locale is passed to the formatting function), the global locale.otherwise, the locale denoted by the std::locale passed to the formatting function, if any,.the default "C" locale if L is not present in the format specification,.The locale used for formatting is determined as follows: precision is valid only for std::chrono::duration types where the representation type Rep is a floating-point type, otherwise std::format_error is thrown. The ratio type that represents the length of a period in seconds.Fill-and-align (optional) width (optional) precision (optional) L (optional) chrono-spec (optional)įill-and-align, width, and precision have the same meaning as in standard format specification. The duration type used to represent the time point. The second template parameter ( Duration) The clock class (either system_clock, steady_clock, high_resolution_clock or a custom clock class). They are widely used as parameter and return types by member functions: The following aliases are member types of time_point. Template parameters Clock A clock class, such as system_clock, steady_clock, high_resolution_clock or a custom clock class. Internally, the object stores an object of a duration type, and uses the Clock type as a reference for its epoch. A time_point object expresses a point in time relative to a clock's epoch.
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