Make format methods localizable #680
Description
It should be possible to make format methods localizable by passing a struct Localization with the month and weekday names.
This struct is passed down to fmt_month and fmt_weekday methods that used it instead of the hardcoded MONTH_NAMES and WEEKDAY_NAMES.
pub struct Localization {
pub month_names: [&[u8]; 12],
pub weekday_names: [&[u8]; 7],
}
impl Localization {
pub const EN: Self = Self { /* ... */ }
pub const FR: Self = Self { /* ... */ }
pub const DE: Self = Self { /* ... */ }
pub const ES: Self = Self { /* ... */ }
/* ... */
}
pub trait Sealed {
fn format_into(
&self,
output: &mut impl Write,
localization: &Localization, // <-- new argument
date: Option<Date>,
time: Option<Time>,
offset: Option<UtcOffset>
) -> Result<usize, Format>;
fn format(
&self,
localization: &Localization, // <-- new argument
date: Option<Date>,
time: Option<Time>,
offset: Option<UtcOffset>
) -> Result<String, Format> { ... }
}
impl { Date, Time, ... } {
pub fn format(self, format: &(impl Formattable + ?Sized)) -> Result<String, error::Format> {
// Preserve the current behaviour
self.format_localized(format, &Localization::EN)
}
pub fn format_localized(self, format: &(impl Formattable + ?Sized), localization: &Localization) -> Result<String, error::Format> {
format.format(localization, Some(self), None, None)
}
}