Macro time::macros::format_description
source ยท format_description!() { /* proc-macro */ }
Expand description
Equivalent of performing format_description::parse()
at compile time.
Using the macro instead of the function results in a static slice rather than a Vec
,
such that it can be used in #![no_alloc]
situations.
The resulting expression can be used in const
or static
declarations, and implements
the sealed traits required for both formatting and parsing.
assert_eq!(
format_description!("[hour]:[minute]:[second]"),
format_description::parse("[hour]:[minute]:[second]")?
);
The syntax accepted by this macro is the same as format_description::parse()
, which can
be found in the book.