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Create TypedNeoDateTimeFormatter and DateTimePattern types (#4415)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,161 @@ | ||
| // 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 ). | ||
|
|
||
| //! Internal traits and structs for loading data from other crates. | ||
| use icu_calendar::provider::WeekDataV2Marker; | ||
| use icu_calendar::week::WeekCalculator; | ||
| use icu_calendar::CalendarError; | ||
| use icu_decimal::options::FixedDecimalFormatterOptions; | ||
| use icu_decimal::provider::DecimalSymbolsV1Marker; | ||
| use icu_decimal::{DecimalError, FixedDecimalFormatter}; | ||
| use icu_provider::prelude::*; | ||
|
|
||
| /// Trait for loading a FixedDecimalFormatter. | ||
| /// | ||
| /// Implemented on the provider-specific loader types in this module. | ||
| pub(crate) trait FixedDecimalFormatterLoader { | ||
| fn load( | ||
| &self, | ||
| locale: &DataLocale, | ||
| options: FixedDecimalFormatterOptions, | ||
| ) -> Result<FixedDecimalFormatter, DecimalError>; | ||
| } | ||
|
|
||
| /// Trait for loading a WeekCalculator. | ||
| /// | ||
| /// Implemented on the provider-specific loader types in this module. | ||
| pub(crate) trait WeekCalculatorLoader { | ||
| fn load(&self, locale: &DataLocale) -> Result<WeekCalculator, CalendarError>; | ||
| } | ||
|
|
||
| /// Helper for type resolution with optional loader arguments | ||
| pub(crate) struct PhantomLoader { | ||
| _not_constructible: core::convert::Infallible, | ||
| } | ||
|
|
||
| impl FixedDecimalFormatterLoader for PhantomLoader { | ||
| fn load( | ||
| &self, | ||
| _locale: &DataLocale, | ||
| _options: FixedDecimalFormatterOptions, | ||
| ) -> Result<FixedDecimalFormatter, DecimalError> { | ||
| unreachable!() // not constructible | ||
| } | ||
| } | ||
|
|
||
| impl WeekCalculatorLoader for PhantomLoader { | ||
| #[inline] | ||
| fn load(&self, _locale: &DataLocale) -> Result<WeekCalculator, CalendarError> { | ||
| unreachable!() // not constructible | ||
| } | ||
| } | ||
|
|
||
| /// Loader for types from other crates using compiled data. | ||
| #[cfg(feature = "compiled_data")] | ||
| pub(crate) struct ExternalLoaderCompiledData; | ||
|
|
||
| #[cfg(feature = "compiled_data")] | ||
| impl FixedDecimalFormatterLoader for ExternalLoaderCompiledData { | ||
| #[inline] | ||
| fn load( | ||
| &self, | ||
| locale: &DataLocale, | ||
| options: FixedDecimalFormatterOptions, | ||
| ) -> Result<FixedDecimalFormatter, DecimalError> { | ||
| FixedDecimalFormatter::try_new(locale, options) | ||
| } | ||
| } | ||
|
|
||
| #[cfg(feature = "compiled_data")] | ||
| impl WeekCalculatorLoader for ExternalLoaderCompiledData { | ||
| #[inline] | ||
| fn load(&self, locale: &DataLocale) -> Result<WeekCalculator, CalendarError> { | ||
| WeekCalculator::try_new(locale) | ||
| } | ||
| } | ||
|
|
||
| /// Loader for types from other crates using [`AnyProvider`]. | ||
| pub(crate) struct ExternalLoaderAny<'a, P: ?Sized>(pub &'a P); | ||
|
|
||
| impl<P> FixedDecimalFormatterLoader for ExternalLoaderAny<'_, P> | ||
| where | ||
| P: ?Sized + AnyProvider, | ||
| { | ||
| #[inline] | ||
| fn load( | ||
| &self, | ||
| locale: &DataLocale, | ||
| options: FixedDecimalFormatterOptions, | ||
| ) -> Result<FixedDecimalFormatter, DecimalError> { | ||
| FixedDecimalFormatter::try_new_with_any_provider(self.0, locale, options) | ||
| } | ||
| } | ||
|
|
||
| impl<P> WeekCalculatorLoader for ExternalLoaderAny<'_, P> | ||
| where | ||
| P: ?Sized + AnyProvider, | ||
| { | ||
| #[inline] | ||
| fn load(&self, locale: &DataLocale) -> Result<WeekCalculator, CalendarError> { | ||
| WeekCalculator::try_new_with_any_provider(self.0, locale) | ||
| } | ||
| } | ||
|
|
||
| /// Loader for types from other crates using [`BufferProvider`]. | ||
| #[cfg(feature = "serde")] | ||
| pub(crate) struct ExternalLoaderBuffer<'a, P: ?Sized>(pub &'a P); | ||
|
|
||
| #[cfg(feature = "serde")] | ||
| impl<P> FixedDecimalFormatterLoader for ExternalLoaderBuffer<'_, P> | ||
| where | ||
| P: ?Sized + BufferProvider, | ||
| { | ||
| #[inline] | ||
| fn load( | ||
| &self, | ||
| locale: &DataLocale, | ||
| options: FixedDecimalFormatterOptions, | ||
| ) -> Result<FixedDecimalFormatter, DecimalError> { | ||
| FixedDecimalFormatter::try_new_with_buffer_provider(self.0, locale, options) | ||
| } | ||
| } | ||
|
|
||
| #[cfg(feature = "serde")] | ||
| impl<P> WeekCalculatorLoader for ExternalLoaderBuffer<'_, P> | ||
| where | ||
| P: ?Sized + BufferProvider, | ||
| { | ||
| #[inline] | ||
| fn load(&self, locale: &DataLocale) -> Result<WeekCalculator, CalendarError> { | ||
| WeekCalculator::try_new_with_buffer_provider(self.0, locale) | ||
| } | ||
| } | ||
|
|
||
| /// Loader for types from other crates using [`DataProvider`]. | ||
| pub(crate) struct ExternalLoaderUnstable<'a, P: ?Sized>(pub &'a P); | ||
|
|
||
| impl<P> FixedDecimalFormatterLoader for ExternalLoaderUnstable<'_, P> | ||
| where | ||
| P: ?Sized + DataProvider<DecimalSymbolsV1Marker>, | ||
| { | ||
| #[inline] | ||
| fn load( | ||
| &self, | ||
| locale: &DataLocale, | ||
| options: FixedDecimalFormatterOptions, | ||
| ) -> Result<FixedDecimalFormatter, DecimalError> { | ||
| FixedDecimalFormatter::try_new_unstable(self.0, locale, options) | ||
| } | ||
| } | ||
|
|
||
| impl<P> WeekCalculatorLoader for ExternalLoaderUnstable<'_, P> | ||
| where | ||
| P: ?Sized + DataProvider<WeekDataV2Marker>, | ||
| { | ||
| #[inline] | ||
| fn load(&self, locale: &DataLocale) -> Result<WeekCalculator, CalendarError> { | ||
| WeekCalculator::try_new_unstable(self.0, locale) | ||
| } | ||
| } |
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