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// This file is part of ICU4X. For terms of use, please see the file
// called LICENSE at the top level of the ICU4X source tree
// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
use crate::helpers::size_test;
#[cfg(feature = "experimental")]
use crate::provider::date_time::UnsupportedOptionsOrDataOrPatternError;
use crate::provider::{
calendar::*,
date_time::{PatternForLengthError, PatternSelector},
};
use crate::{calendar, options::DateTimeFormatterOptions, raw, DateFormatter, TimeFormatter};
use crate::{input::DateTimeInput, DateTimeError, FormattedDateTime};
use alloc::string::String;
use icu_calendar::any_calendar::AnyCalendar;
use icu_calendar::provider::{
ChineseCacheV1Marker, DangiCacheV1Marker, IslamicObservationalCacheV1Marker,
IslamicUmmAlQuraCacheV1Marker, JapaneseErasV1Marker, JapaneseExtendedErasV1Marker,
WeekDataV1Marker,
};
use icu_decimal::provider::DecimalSymbolsV1Marker;
use icu_plurals::provider::OrdinalV1Marker;
use icu_provider::prelude::*;
use icu_provider::DataLocale;
use writeable::Writeable;
size_test!(DateTimeFormatter, date_time_formatter_size, 5208);
/// [`DateTimeFormatter`] is a formatter capable of formatting
/// date/times from any calendar, selected at runtime. For the difference between this and [`TypedDateTimeFormatter`](crate::TypedDateTimeFormatter),
/// please read the [crate root docs][crate].
///
/// When constructed, it uses data from the [data provider], selected locale and provided options to
/// collect all data necessary to format any dates into that locale.
///
/// For that reason, one should think of the process of formatting a date in two steps - first, a computational
/// heavy construction of [`DateTimeFormatter`], and then fast formatting of [`DateTime`](icu_calendar::DateTime) data using the instance.
#[doc = date_time_formatter_size!()]
///
/// [`icu::datetime`]: crate
///
/// # Examples
///
/// ```
/// use icu::calendar::DateTime;
/// use icu::datetime::{options::length, DateTimeFormatter};
/// use icu::locid::locale;
/// use writeable::assert_writeable_eq;
///
/// let mut options = length::Bag::from_date_time_style(
/// length::Date::Medium,
/// length::Time::Short,
/// );
///
/// let dtf = DateTimeFormatter::try_new(
/// &locale!("en-u-ca-gregory").into(),
/// options.into(),
/// )
/// .expect("Failed to create DateTimeFormatter instance.");
///
/// let datetime = DateTime::try_new_iso_datetime(2020, 9, 1, 12, 34, 28)
/// .expect("Failed to construct DateTime.");
/// let any_datetime = datetime.to_any();
///
/// assert_writeable_eq!(
/// dtf.format(&any_datetime).expect("Calendars should match"),
/// "Sep 1, 2020, 12:34 PM"
/// );
/// ```
///
/// Since this works with [`AnyCalendar`], you can use [`DateTime`](icu_calendar::DateTime) with [`AnyCalendar`]
/// to have a date in a runtime-selected calendar:
///
/// ```
/// use icu::calendar::{AnyCalendar, DateTime, Time};
/// use icu::datetime::{options::length, DateTimeFormatter};
/// use icu::locid::locale;
/// use writeable::assert_writeable_eq;
/// # use std::rc::Rc;
///
/// let locale = locale!("en-u-ca-japanese").into(); // English with the Japanese calendar
///
/// let calendar = AnyCalendar::new_for_locale(&locale);
/// let calendar = Rc::new(calendar); // Avoid cloning it
///
///
/// // manually construct a datetime in this calendar
/// let manual_time = Time::try_new(12, 33, 12, 0).expect("failed to construct Time");
/// // construct from era code, year, month code, day, time, and a calendar
/// // This is March 28, 15 Heisei
/// let manual_datetime = DateTime::try_new_from_codes("heisei".parse().unwrap(), 15, "M03".parse().unwrap(), 28,
/// manual_time, calendar.clone())
/// .expect("Failed to construct DateTime manually");
///
///
/// // construct another datetime by converting from ISO
/// let iso_datetime = DateTime::try_new_iso_datetime(2020, 9, 1, 12, 34, 28)
/// .expect("Failed to construct ISO DateTime.");
/// let iso_converted = iso_datetime.to_calendar(calendar);
///
///
/// let options = length::Bag::from_date_time_style(length::Date::Medium, length::Time::Short);
///
/// let dtf = DateTimeFormatter::try_new(&locale, options.into())
/// .expect("Failed to create DateTimeFormatter instance.");
///
/// let manual_value = dtf.format(&manual_datetime).expect("Calendars should match");
/// assert_writeable_eq!(manual_value, "Mar 28, 15 Heisei, 12:33 PM");
///
/// let converted_value = dtf.format(&iso_converted).expect("Calendars should match");
/// assert_writeable_eq!(converted_value, "Sep 1, 2 Reiwa, 12:34 PM");
/// ```
///
/// This model replicates that of `ICU` and `ECMA402`.
///
/// [data provider]: icu_provider
#[derive(Debug)]
pub struct DateTimeFormatter(pub(crate) raw::DateTimeFormatter, AnyCalendar);
impl DateTimeFormatter {
/// Construct a new [`DateTimeFormatter`] from compiled data.
///
/// This method will pick the calendar off of the locale; and if unspecified or unknown will fall back to the default
/// calendar for the locale. See [`AnyCalendarKind`](icu_calendar::AnyCalendarKind) for a list of supported calendars.
///
/// ✨ *Enabled with the `compiled_data` Cargo feature.*
///
/// [📚 Help choosing a constructor](icu_provider::constructors)
///
/// # Examples
///
/// ```
/// use icu::calendar::DateTime;
/// use icu::datetime::{options::length, DateTimeFormatter};
/// use icu::locid::locale;
/// use writeable::assert_writeable_eq;
///
/// let options = length::Bag::from_date_time_style(
/// length::Date::Medium,
/// length::Time::Short,
/// );
/// let locale = locale!("en-u-ca-gregory").into();
///
/// let dtf = DateTimeFormatter::try_new(&locale, options.into())
/// .expect("Failed to create TypedDateTimeFormatter instance.");
///
/// let datetime = DateTime::try_new_iso_datetime(2020, 9, 1, 12, 34, 28)
/// .expect("Failed to construct DateTime.");
/// let any_datetime = datetime.to_any();
///
/// assert_writeable_eq!(
/// dtf.format(&any_datetime).expect("Calendars should match"),
/// "Sep 1, 2020, 12:34 PM"
/// );
/// ```
/// ✨ *Enabled with the `compiled_data` Cargo feature.*
///
/// [📚 Help choosing a constructor](icu_provider::constructors)
#[cfg(feature = "compiled_data")]
#[inline]
pub fn try_new(
locale: &DataLocale,
options: DateTimeFormatterOptions,
) -> Result<Self, DateTimeError> {
let calendar = AnyCalendar::new_for_locale(locale);
let kind = calendar.kind();
let patterns = PatternSelector::for_options(
&crate::provider::Baked,
calendar::load_lengths_for_any_calendar_kind(&crate::provider::Baked, locale, kind)?,
locale,
&options,
)
.map_err(|e| match e {
PatternForLengthError::Data(e) => DateTimeError::Data(e),
PatternForLengthError::Pattern(e) => DateTimeError::Pattern(e),
})?;
Ok(Self(
raw::DateTimeFormatter::try_new(
patterns,
|| {
calendar::load_symbols_for_any_calendar_kind(
&crate::provider::Baked,
locale,
kind,
)
},
locale,
)?,
calendar,
))
}
#[doc = icu_provider::gen_any_buffer_unstable_docs!(ANY, Self::try_new)]
#[inline]
pub fn try_new_with_any_provider(
provider: &impl AnyProvider,
locale: &DataLocale,
options: DateTimeFormatterOptions,
) -> Result<Self, DateTimeError> {
let downcasting = provider.as_downcasting();
Self::try_new_unstable(&downcasting, locale, options)
}
#[doc = icu_provider::gen_any_buffer_unstable_docs!(BUFFER, Self::try_new)]
#[inline]
#[cfg(feature = "serde")]
pub fn try_new_with_buffer_provider(
provider: &impl BufferProvider,
locale: &DataLocale,
options: DateTimeFormatterOptions,
) -> Result<Self, DateTimeError> {
let deserializing = provider.as_deserializing();
Self::try_new_unstable(&deserializing, locale, options)
}
#[doc = icu_provider::gen_any_buffer_unstable_docs!(UNSTABLE, Self::try_new_experimental)]
#[cfg(feature = "experimental")]
#[inline(never)]
pub fn try_new_experimental_unstable<P>(
provider: &P,
locale: &DataLocale,
options: DateTimeFormatterOptions,
) -> Result<Self, DateTimeError>
where
P: DataProvider<TimeSymbolsV1Marker>
+ DataProvider<TimeLengthsV1Marker>
+ DataProvider<crate::provider::calendar::DateSkeletonPatternsV1Marker>
+ DataProvider<OrdinalV1Marker>
+ DataProvider<WeekDataV1Marker>
+ DataProvider<DecimalSymbolsV1Marker>
+ DataProvider<BuddhistDateLengthsV1Marker>
+ DataProvider<BuddhistDateSymbolsV1Marker>
+ DataProvider<ChineseCacheV1Marker>
+ DataProvider<ChineseDateLengthsV1Marker>
+ DataProvider<ChineseDateSymbolsV1Marker>
+ DataProvider<CopticDateLengthsV1Marker>
+ DataProvider<CopticDateSymbolsV1Marker>
+ DataProvider<DangiCacheV1Marker>
+ DataProvider<DangiDateLengthsV1Marker>
+ DataProvider<DangiDateSymbolsV1Marker>
+ DataProvider<EthiopianDateLengthsV1Marker>
+ DataProvider<EthiopianDateSymbolsV1Marker>
+ DataProvider<GregorianDateLengthsV1Marker>
+ DataProvider<GregorianDateSymbolsV1Marker>
+ DataProvider<HebrewDateLengthsV1Marker>
+ DataProvider<HebrewDateSymbolsV1Marker>
+ DataProvider<IndianDateLengthsV1Marker>
+ DataProvider<IndianDateSymbolsV1Marker>
+ DataProvider<IslamicDateLengthsV1Marker>
+ DataProvider<IslamicDateSymbolsV1Marker>
+ DataProvider<IslamicObservationalCacheV1Marker>
+ DataProvider<IslamicUmmAlQuraCacheV1Marker>
+ DataProvider<JapaneseDateLengthsV1Marker>
+ DataProvider<JapaneseDateSymbolsV1Marker>
+ DataProvider<JapaneseErasV1Marker>
+ DataProvider<JapaneseExtendedDateLengthsV1Marker>
+ DataProvider<JapaneseExtendedDateSymbolsV1Marker>
+ DataProvider<JapaneseExtendedErasV1Marker>
+ DataProvider<PersianDateLengthsV1Marker>
+ DataProvider<PersianDateSymbolsV1Marker>
+ DataProvider<RocDateLengthsV1Marker>
+ DataProvider<RocDateSymbolsV1Marker>
+ ?Sized,
{
let calendar = AnyCalendar::try_new_for_locale_unstable(provider, locale)?;
let kind = calendar.kind();
let patterns = PatternSelector::for_options_experimental(
provider,
calendar::load_lengths_for_any_calendar_kind(provider, locale, kind)?,
locale,
&kind.as_bcp47_value(),
&options,
)
.map_err(|e| match e {
UnsupportedOptionsOrDataOrPatternError::UnsupportedOptions => {
DateTimeError::UnsupportedOptions
}
UnsupportedOptionsOrDataOrPatternError::Data(e) => DateTimeError::Data(e),
UnsupportedOptionsOrDataOrPatternError::Pattern(e) => DateTimeError::Pattern(e),
})?;
Ok(Self(
raw::DateTimeFormatter::try_new_unstable(
provider,
patterns,
|| calendar::load_symbols_for_any_calendar_kind(provider, locale, kind),
locale,
)?,
calendar,
))
}
/// Constructor that supports experimental options with compiled data.
///
/// ✨ *Enabled with the `compiled_data` and `experimental` Cargo features.*
///
/// [📚 Help choosing a constructor](icu_provider::constructors)
///
/// <div class="stab unstable">
/// 🚧 This code is experimental; it may change at any time, in breaking or non-breaking ways,
/// including in SemVer minor releases. It can be enabled with the "experimental" Cargo feature
/// of the icu meta-crate. Use with caution.
/// <a href="https://github.com/unicode-org/icu4x/issues/1317">#1317</a>
/// </div>
///
/// # Examples
///
/// ```
/// use icu::calendar::DateTime;
/// use icu::datetime::{options::components, DateTimeFormatter};
/// use icu::locid::locale;
/// use writeable::assert_writeable_eq;
///
/// let mut options = components::Bag::default();
/// options.year = Some(components::Year::Numeric);
/// options.month = Some(components::Month::Long);
///
/// let dtf = DateTimeFormatter::try_new_experimental(
/// &locale!("en-u-ca-gregory").into(),
/// options.into(),
/// )
/// .expect("Failed to create TypedDateTimeFormatter instance.");
///
/// let datetime = DateTime::try_new_iso_datetime(2020, 9, 1, 12, 34, 28)
/// .expect("Failed to construct DateTime.");
/// let any_datetime = datetime.to_any();
///
/// assert_writeable_eq!(
/// dtf.format(&any_datetime).expect("Calendars should match"),
/// "September 2020"
/// );
/// ```
#[cfg(feature = "experimental")]
#[cfg(feature = "compiled_data")]
#[inline(never)]
pub fn try_new_experimental(
locale: &DataLocale,
options: DateTimeFormatterOptions,
) -> Result<Self, DateTimeError> {
let calendar = AnyCalendar::new_for_locale(locale);
let kind = calendar.kind();
let patterns = PatternSelector::for_options_experimental(
&crate::provider::Baked,
calendar::load_lengths_for_any_calendar_kind(&crate::provider::Baked, locale, kind)?,
locale,
&kind.as_bcp47_value(),
&options,
)
.map_err(|e| match e {
UnsupportedOptionsOrDataOrPatternError::UnsupportedOptions => {
DateTimeError::UnsupportedOptions
}
UnsupportedOptionsOrDataOrPatternError::Data(e) => DateTimeError::Data(e),
UnsupportedOptionsOrDataOrPatternError::Pattern(e) => DateTimeError::Pattern(e),
})?;
Ok(Self(
raw::DateTimeFormatter::try_new(
patterns,
|| {
calendar::load_symbols_for_any_calendar_kind(
&crate::provider::Baked,
locale,
kind,
)
},
locale,
)?,
calendar,
))
}
#[doc = icu_provider::gen_any_buffer_unstable_docs!(UNSTABLE, Self::try_new)]
#[inline(never)]
pub fn try_new_unstable<P>(
provider: &P,
locale: &DataLocale,
options: DateTimeFormatterOptions,
) -> Result<Self, DateTimeError>
where
P: DataProvider<TimeSymbolsV1Marker>
+ DataProvider<TimeLengthsV1Marker>
+ DataProvider<OrdinalV1Marker>
+ DataProvider<WeekDataV1Marker>
+ DataProvider<DecimalSymbolsV1Marker>
+ DataProvider<BuddhistDateLengthsV1Marker>
+ DataProvider<BuddhistDateSymbolsV1Marker>
+ DataProvider<ChineseCacheV1Marker>
+ DataProvider<ChineseDateLengthsV1Marker>
+ DataProvider<ChineseDateSymbolsV1Marker>
+ DataProvider<CopticDateLengthsV1Marker>
+ DataProvider<CopticDateSymbolsV1Marker>
+ DataProvider<DangiCacheV1Marker>
+ DataProvider<DangiDateLengthsV1Marker>
+ DataProvider<DangiDateSymbolsV1Marker>
+ DataProvider<EthiopianDateLengthsV1Marker>
+ DataProvider<EthiopianDateSymbolsV1Marker>
+ DataProvider<GregorianDateLengthsV1Marker>
+ DataProvider<GregorianDateSymbolsV1Marker>
+ DataProvider<HebrewDateLengthsV1Marker>
+ DataProvider<HebrewDateSymbolsV1Marker>
+ DataProvider<IndianDateLengthsV1Marker>
+ DataProvider<IndianDateSymbolsV1Marker>
+ DataProvider<IslamicDateLengthsV1Marker>
+ DataProvider<IslamicDateSymbolsV1Marker>
+ DataProvider<JapaneseDateLengthsV1Marker>
+ DataProvider<JapaneseDateSymbolsV1Marker>
+ DataProvider<JapaneseErasV1Marker>
+ DataProvider<JapaneseExtendedDateLengthsV1Marker>
+ DataProvider<JapaneseExtendedDateSymbolsV1Marker>
+ DataProvider<JapaneseExtendedErasV1Marker>
+ DataProvider<IslamicObservationalCacheV1Marker>
+ DataProvider<IslamicUmmAlQuraCacheV1Marker>
+ DataProvider<PersianDateLengthsV1Marker>
+ DataProvider<PersianDateSymbolsV1Marker>
+ DataProvider<RocDateLengthsV1Marker>
+ DataProvider<RocDateSymbolsV1Marker>
+ ?Sized,
{
let calendar = AnyCalendar::try_new_for_locale_unstable(provider, locale)?;
let kind = calendar.kind();
let patterns = PatternSelector::for_options(
provider,
calendar::load_lengths_for_any_calendar_kind(provider, locale, kind)?,
locale,
&options,
)
.map_err(|e| match e {
PatternForLengthError::Data(e) => DateTimeError::Data(e),
PatternForLengthError::Pattern(e) => DateTimeError::Pattern(e),
})?;
Ok(Self(
raw::DateTimeFormatter::try_new_unstable(
provider,
patterns,
|| calendar::load_symbols_for_any_calendar_kind(provider, locale, kind),
locale,
)?,
calendar,
))
}
/// Constructor that takes a [`TimeFormatter`] and [`DateFormatter`] and combines them into a [`DateTimeFormatter`].
/// Prefer using one of the other constructors if possible.
///
/// # Examples
///
/// ```
/// use icu::calendar::DateTime;
/// use icu::datetime::{
/// options::length, DateFormatter, DateTimeFormatter, TimeFormatter,
/// };
/// use icu::locid::locale;
/// use writeable::assert_writeable_eq;
///
/// let df = DateFormatter::try_new_with_length(
/// &locale!("en-u-ca-gregory").into(),
/// length::Date::Medium,
/// )
/// .expect("Failed to create TypedDateFormatter instance.");
///
/// let tf = TimeFormatter::try_new_with_length(
/// &locale!("en").into(),
/// length::Time::Short,
/// )
/// .expect("Failed to create TimeFormatter instance.");
///
/// let dtf = DateTimeFormatter::try_from_date_and_time(df, tf).unwrap();
///
/// let datetime = DateTime::try_new_iso_datetime(2020, 9, 1, 12, 34, 28)
/// .expect("Failed to construct DateTime.");
/// let any_datetime = datetime.to_any();
///
/// assert_writeable_eq!(
/// dtf.format(&any_datetime).expect("Calendars should match"),
/// "Sep 1, 2020, 12:34 PM"
/// );
/// ```
///
/// [data provider]: icu_provider
#[inline]
pub fn try_from_date_and_time(
date: DateFormatter,
time: TimeFormatter,
) -> Result<Self, DateTimeError>
where {
Ok(Self(
raw::DateTimeFormatter::try_from_date_and_time(date.0, time.0)?,
date.1,
))
}
/// Takes a [`DateTimeInput`] implementer and returns an instance of a [`FormattedDateTime`]
/// that contains all information necessary to display a formatted date and operate on it.
///
/// This function will fail if the date passed in uses a different calendar than that of the
/// AnyCalendar. Please convert dates before passing them in if necessary. This function
/// will automatically convert and format dates that are associated with the ISO calendar.
#[inline]
pub fn format<'l, T>(&'l self, value: &T) -> Result<FormattedDateTime<'l>, DateTimeError>
where
T: DateTimeInput<Calendar = AnyCalendar>,
{
if let Some(converted) = calendar::convert_datetime_if_necessary(&self.1, value)? {
Ok(self.0.format(&converted))
} else {
Ok(self.0.format(value))
}
}
/// Takes a [`DateTimeInput`] implementer and returns it formatted as a string.
///
/// This function will fail if the date passed in uses a different calendar than that of the
/// AnyCalendar. Please convert dates before passing them in if necessary. This function
/// will automatically convert and format dates that are associated with the ISO calendar.
#[inline]
pub fn format_to_string(
&self,
value: &impl DateTimeInput<Calendar = AnyCalendar>,
) -> Result<String, DateTimeError> {
Ok(self.format(value)?.write_to_string().into_owned())
}
/// Returns a [`components::Bag`](crate::options::components::Bag) that represents the resolved components for the
/// options that were provided to the [`DateTimeFormatter`]. The developer may request
/// a certain set of options for a [`DateTimeFormatter`] but the locale and resolution
/// algorithm may change certain details of what actually gets resolved.
///
/// ✨ *Enabled with the `experimental` Cargo feature.*
///
/// <div class="stab unstable">
/// 🚧 This code is experimental; it may change at any time, in breaking or non-breaking ways,
/// including in SemVer minor releases. It can be enabled with the "experimental" Cargo feature
/// of the icu meta-crate. Use with caution.
/// <a href="https://github.com/unicode-org/icu4x/issues/1317">#1317</a>
/// </div>
///
/// # Examples
///
/// ```
/// use icu::datetime::{
/// options::{components, length},
/// DateTimeFormatter,
/// };
/// use icu::locid::locale;
///
/// let options = length::Bag::from_date_style(length::Date::Medium).into();
///
/// let dtf =
/// DateTimeFormatter::try_new(&locale!("en-u-ca-gregory").into(), options)
/// .expect("Failed to create TypedDateTimeFormatter instance.");
///
/// let mut expected_components_bag = components::Bag::default();
/// expected_components_bag.year = Some(components::Year::Numeric);
/// expected_components_bag.month = Some(components::Month::Short);
/// expected_components_bag.day = Some(components::Day::NumericDayOfMonth);
///
/// assert_eq!(dtf.resolve_components(), expected_components_bag);
/// ```
#[cfg(feature = "experimental")]
pub fn resolve_components(&self) -> crate::options::components::Bag {
self.0.resolve_components()
}
}
#[cfg(test)]
#[cfg(feature = "compiled_data")]
mod tests {
use icu::calendar::{AnyCalendar, DateTime};
use icu::datetime::{options::length, DateTimeFormatter};
use icu::locid::locale;
use icu_provider::DataLocale;
fn test_format(datetime: &DateTime<AnyCalendar>, locale: DataLocale, expected: &str) {
let options = length::Bag::from_date_time_style(length::Date::Long, length::Time::Short);
let dtf = DateTimeFormatter::try_new(&locale, options.into()).unwrap();
writeable::assert_writeable_eq!(
dtf.format(datetime).expect("Calendars should match"),
expected
);
}
#[test]
fn test_fallback() {
// We can rely on the code's ability to convert ISO datetimes
let datetime = DateTime::try_new_iso_datetime(2022, 4, 5, 12, 33, 44).unwrap();
let datetime = datetime.to_any();
// fr with unspecified and nonsense calendars falls back to gregorian
test_format(&datetime, locale!("fr").into(), "5 avril 2022, 12:33");
test_format(
&datetime,
locale!("fr-u-ca-blahblah").into(),
"5 avril 2022, 12:33",
);
// thai falls back to buddhist
test_format(
&datetime,
locale!("th-u-ca-buddhist").into(),
"5 เมษายน 2565 12:33",
);
test_format(&datetime, locale!("th").into(), "5 เมษายน 2565 12:33");
// except when overridden
test_format(
&datetime,
locale!("th-u-ca-gregory").into(),
"5 เมษายน ค.ศ. 2022 12:33",
);
}
#[test]
#[cfg(feature = "serde")]
fn works_with_default_options() {
assert_eq!(
DateTimeFormatter::try_new(Default::default(), Default::default(),)
.unwrap()
.format_to_string(
&DateTime::try_new_iso_datetime(2022, 9, 20, 0, 0, 0)
.unwrap()
.to_any()
)
.unwrap(),
"2022 M09 20 00:00:00"
);
}
}
#[test]
#[cfg(feature = "serde")]
fn buffer_constructor() {
use icu::calendar::DateTime;
use icu::datetime::{options::length, DateTimeFormatter};
use icu::locid::locale;
use writeable::assert_writeable_eq;
let provider = icu_provider_blob::BlobDataProvider::try_new_from_static_blob(include_bytes!(
"../../tests/data/blob.postcard"
))
.unwrap();
let dtf = DateTimeFormatter::try_new_with_buffer_provider(
&provider,
&locale!("en").into(),
length::Bag::from_date_time_style(length::Date::Medium, length::Time::Short).into(),
)
.unwrap();
assert_writeable_eq!(
dtf.format(
&DateTime::try_new_iso_datetime(2020, 9, 1, 12, 34, 28)
.unwrap()
.to_any()
)
.expect("Calendars should match"),
"Sep 1, 2020, 12:34 PM"
);
}