mirror/fmt
1
0
Fork 0
mirror of https://github.com/fmtlib/fmt.git synced 2025-02-14 18:40:44 +00:00
Code Issues Packages Projects Releases Wiki Activity

Document more chrono specs

Browse Source
This commit is contained in:
Victor Zverovich 2022-11-08 19:35:34 -10:00
parent bd19593204
commit d2e89c8b08
1 changed files with 72 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

82
doc/syntax.rst
View File

@ -326,26 +326,27 @@ The available presentation types (*chrono_type*) are:
+---------+--------------------------------------------------------------------+
| Type | Meaning |
+=========+====================================================================+
| ``'a'`` | The abbreviated weekday name e.g. "Sat". If the value does not |
| ``'a'`` | The abbreviated weekday name, e.g. "Sat". If the value does not |
| | contain a valid weekday, an exception of type ``format_error`` is |
| | thrown. |
+---------+--------------------------------------------------------------------+
| ``'A'`` | The full weekday name e.g. "Saturday". If the value does not |
| ``'A'`` | The full weekday name, e.g. "Saturday". If the value does not |
| | contain a valid weekday, an exception of type ``format_error`` is |
| | thrown. |
+---------+--------------------------------------------------------------------+
| ``'b'`` | The abbreviated month name e.g. "Nov". If the value does not |
| ``'b'`` | The abbreviated month name, e.g. "Nov". If the value does not |
| | contain a valid month, an exception of type ``format_error`` is |
| | thrown. |
+---------+--------------------------------------------------------------------+
| ``'B'`` | The full month name e.g. "November". If the value does not contain |
| | a valid month, an exception of type ``format_error`` is thrown. |
| ``'B'`` | The full month name, e.g. "November". If the value does not |
| | contain a valid month, an exception of type ``format_error`` is |
| | thrown. |
+---------+--------------------------------------------------------------------+
| ``'c'`` | The date and time representation e.g. "Sat Nov 12 22:04:00 1955". |
| ``'c'`` | The date and time representation, e.g. "Sat Nov 12 22:04:00 1955". |
| | The modified command ``%Ec`` produces the locale's alternate date |
| | and time representation. |
+---------+--------------------------------------------------------------------+
| ``'C'`` | The year divided by 100 using floored division e.g. "55". If the |
| ``'C'`` | The year divided by 100 using floored division, e.g. "55". If the |
| | result is a single decimal digit, it is prefixed with 0. |
| | The modified command ``%EC`` produces the locale's alternative |
| | representation of the century. |
@ -354,13 +355,13 @@ The available presentation types (*chrono_type*) are:
| | decimal digit, it is prefixed with 0. The modified command ``%Od`` |
| | produces the locale's alternative representation. |
+---------+--------------------------------------------------------------------+
| ``'D'`` | Equivalent to ``%m/%d/%y`` e.g. "11/12/55". |
| ``'D'`` | Equivalent to ``%m/%d/%y``, e.g. "11/12/55". |
+---------+--------------------------------------------------------------------+
| ``'e'`` | The day of month as a decimal number. If the result is a single |
| | decimal digit, it is prefixed with a space. The modified command |
| | ``%Oe`` produces the locale's alternative representation. |
+---------+--------------------------------------------------------------------+
| ``'F'`` | Equivalent to ``%Y-%m-%d`` e.g. "1955-11-12". |
| ``'F'`` | Equivalent to ``%Y-%m-%d``, e.g. "1955-11-12". |
+---------+--------------------------------------------------------------------+
| ``'g'`` | The last two decimal digits of the ISO week-based year. If the |
| | result is a single digit it is prefixed by 0. |
@ -368,7 +369,7 @@ The available presentation types (*chrono_type*) are:
| ``'G'`` | The ISO week-based year as a decimal number. If the result is less |
| | than four digits it is left-padded with 0 to four digits. |
+---------+--------------------------------------------------------------------+
| ``'h'`` | Equivalent to ``%b`` e.g. "Nov". |
| ``'h'`` | Equivalent to ``%b``, e.g. "Nov". |
+---------+--------------------------------------------------------------------+
| ``'H'`` | The hour (24-hour clock) as a decimal number. If the result is a |
| | single digit, it is prefixed with 0. The modified command ``%OH`` |
@ -399,6 +400,10 @@ The available presentation types (*chrono_type*) are:
+---------+--------------------------------------------------------------------+
| ``'Q'`` | The duration's numeric value (as if extracted via ``.count()``). |
+---------+--------------------------------------------------------------------+
| ``'r'`` | The 12-hour clock time, e.g. "10:04:00 PM". |
+---------+--------------------------------------------------------------------+
| ``'R'`` | Equivalent to ``%H:%M``, e.g. "22:04". |
+---------+--------------------------------------------------------------------+
| ``'S'`` | Seconds as a decimal number. If the number of seconds is less than |
| | 10, the result is prefixed with 0. If the precision of the input |
| | cannot be exactly represented with seconds, then the format is a |
@ -409,6 +414,63 @@ The available presentation types (*chrono_type*) are:
| | decimal point is localized according to the locale. The modified |
| | command ``%OS`` produces the locale's alternative representation. |
+---------+--------------------------------------------------------------------+
| ``'t'`` | A horizontal-tab character. |
+---------+--------------------------------------------------------------------+
| ``'T'`` | Equivalent to ``%H:%M:%S``. |
+---------+--------------------------------------------------------------------+
| ``'u'`` | The ISO weekday as a decimal number (1-7), where Monday is 1. The |
| | modified command ``%Ou`` produces the locale's alternative |
| | representation. |
+---------+--------------------------------------------------------------------+
| ``'U'`` | The week number of the year as a decimal number. The first Sunday |
| | of the year is the first day of week 01. Days of the same year |
| | prior to that are in week 00. If the result is a single digit, it |
| | is prefixed with 0. The modified command ``%OU`` produces the |
| | locale's alternative representation. |
+---------+--------------------------------------------------------------------+
| ``'V'`` | The ISO week-based week number as a decimal number. If the result |
| | is a single digit, it is prefixed with 0. The modified command |
| | ``%OV`` produces the locale's alternative representation. |
+---------+--------------------------------------------------------------------+
| ``'w'`` | The weekday as a decimal number (0-6), where Sunday is 0. |
| | The modified command ``%Ow`` produces the locale's alternative |
| | representation. |
+---------+--------------------------------------------------------------------+
| ``'W'`` | The week number of the year as a decimal number. The first Monday |
| | of the year is the first day of week 01. Days of the same year |
| | prior to that are in week 00. If the result is a single digit, it |
| | is prefixed with 0. The modified command ``%OW`` produces the |
| | locale's alternative representation. |
+---------+--------------------------------------------------------------------+
| ``'x'`` | The date representation, e.g. "11/12/55". The modified command |
| | ``%Ex`` produces the locale's alternate date representation. |
+---------+--------------------------------------------------------------------+
| ``'X'`` | The time representation, e.g. "10:04:00". The modified command |
| | ``%EX`` produces the locale's alternate time representation. |
+---------+--------------------------------------------------------------------+
| ``'y'`` | The last two decimal digits of the year. If the result is a single |
| | digit it is prefixed by 0. The modified command ``%Oy`` produces |
| | the locale's alternative representation. The modified command |
| | ``%Ey`` produces the locale's alternative representation of offset |
| | from ``%EC`` (year only). |
+---------+--------------------------------------------------------------------+
| ``'Y'`` | The year as a decimal number. If the result is less than four |
| | digits it is left-padded with 0 to four digits. The modified |
| | command ``%EY`` produces the locale's alternative full year |
| | representation. |
+---------+--------------------------------------------------------------------+
| ``'z'`` | The offset from UTC in the ISO 8601:2004 format. For example -0430 |
| | refers to 4 hours 30 minutes behind UTC. If the offset is zero, |
| | +0000 is used. The modified commands ``%Ez`` and ``%Oz`` insert a |
| | ``:`` between the hours and minutes: -04:30. If the offset |
| | information is not available, an exception of type |
| | ``format_error`` is thrown. |
+---------+--------------------------------------------------------------------+
| ``'Z'`` | The time zone abbreviation. If the time zone abbreviation is not |
| | available, an exception of type ``format_error`` is thrown. |
+---------+--------------------------------------------------------------------+
| ``'%'`` | A % character. |
+---------+--------------------------------------------------------------------+
Specifiers that have a calendaric component such as ``'d'`` (the day of month)
are valid only for ``std::tm`` and time points but not durations.