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Document more chrono specs

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Victor Zverovich 2022-11-08 16:22:23 -10:00
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doc/syntax.rst
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@ -304,8 +304,8 @@ The available presentation types for pointers are:
Chrono Format Specifications
============================
Format specifications for chrono types and ``std::tm`` have the following
syntax:
Format specifications for chrono duration and time point types as well as
``std::tm`` have the following syntax:
.. productionlist:: sf
chrono_format_spec: [[`fill`]`align`][`width`]["." `precision`][`chrono_specs`]
@ -321,8 +321,7 @@ syntax:
Literal chars are copied unchanged to the output. Precision is valid only for
``std::chrono::duration`` types with a floating-point representation type.
The available presentation types (*chrono_type*) for chrono durations and time
points are:
The available presentation types (*chrono_type*) are:
+---------+--------------------------------------------------------------------+
| Type | Meaning |
@ -351,20 +350,55 @@ points are:
| | The modified command ``%EC`` produces the locale's alternative |
| | representation of the century. |
+---------+--------------------------------------------------------------------+
| ``'d'`` | The day of month as a decimal number e.g. "12". If the result is a |
| | single decimal digit, it is prefixed with 0. The modified command |
| | ``%Od`` produces the locale's alternative representation. |
| ``'d'`` | The day of month as a decimal number. If the result is a single |
| | decimal digit, it is prefixed with 0. The modified command ``%Od`` |
| | produces the locale's alternative representation. |
+---------+--------------------------------------------------------------------+
| ``'D'`` | Equivalent to ``%m/%d/%y``. |
| ``'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". |
+---------+--------------------------------------------------------------------+
| ``'g'`` | The last two decimal digits of the ISO week-based year. If the |
| | result is a single digit it is prefixed by 0. |
+---------+--------------------------------------------------------------------+
| ``'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'`` | 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`` |
| | produces the locale's alternative representation. |
+---------+--------------------------------------------------------------------+
| ``'I'`` | The hour (12-hour clock) as a decimal number. If the result is a |
| | single digit, it is prefixed with 0. The modified command ``%OI`` |
| | produces the locale's alternative representation. |
+---------+--------------------------------------------------------------------+
| ``'j'`` | If the type being formatted is a specialization of duration, the |
| | decimal number of days without padding. Otherwise, the day of the |
| | year as a decimal number. Jan 1 is 001. If the result is less than |
| | three digits, it is left-padded with 0 to three digits. |
+---------+--------------------------------------------------------------------+
| ``'m'`` | The month as a decimal number. Jan is 01. If the result is a |
| | single digit, it is prefixed with 0. The modified command ``%Om`` |
| | produces the locale's alternative representation. |
+---------+--------------------------------------------------------------------+
| ``'M'`` | The minute as a decimal number. If the result is a single digit, |
| | it is prefixed with 0. The modified command ``%OM`` produces the |
| | locale's alternative representation. |
+---------+--------------------------------------------------------------------+
| ``'n'`` | A new-line character. |
+---------+--------------------------------------------------------------------+
| ``'p'`` | The AM/PM designations associated with a 12-hour clock. |
+---------+--------------------------------------------------------------------+
| ``'q'`` | The duration's unit suffix. |
+---------+--------------------------------------------------------------------+
| ``'Q'`` | The duration's numeric value (as if extracted via ``.count()``). |
+---------+--------------------------------------------------------------------+
| ``'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 |