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doc: adjust chrono_format_spec documentation to match library behavior

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References: #3237
This commit is contained in:
Jan Engelhardt 2022-12-22 00:17:27 +01:00
parent aad546baa5
commit e38428b934
1 changed files with 11 additions and 5 deletions
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doc/syntax.rst
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@ -304,11 +304,11 @@ The available presentation types for pointers are:
Chrono Format Specifications
============================
Format specifications for chrono duration and time point types as well as
``std::tm`` have the following syntax:
Format specifications for chrono time points as well as ``std::tm`` have the
following syntax:
.. productionlist:: sf
chrono_format_spec: [[`fill`]`align`][`width`]["." `precision`][`chrono_specs`]
chrono_format_spec: [`chrono_specs`]
chrono_specs: [`chrono_specs`] `conversion_spec` | `chrono_specs` `literal_char`
conversion_spec: "%" [`modifier`] `chrono_type`
literal_char: <a character other than '{', '}' or '%'>
@ -318,8 +318,14 @@ Format specifications for chrono duration and time point types as well as
: "q" | "Q" | "r" | "R" | "S" | "t" | "T" | "u" | "U" | "V" |
: "w" | "W" | "x" | "X" | "y" | "Y" | "z" | "Z" | "%"
Literal chars are copied unchanged to the output. Precision is valid only for
``std::chrono::duration`` types with a floating-point representation type.
Literal chars are copied unchanged to the output. For durations, the syntax is:
.. productionlist:: sf
chrono_format_spec: [[`fill`]`align`][`width`]["." `precision`][`chrono_specs`]
chrono_specs: [`chrono_specs`] `literal_char`
Precision is valid only for ``std::chrono::duration`` types with a
floating-point representation type.
The available presentation types (*chrono_type*) are: