#[doc(inline)] pubuse icu_provider::fallback::{java.lang.StringIndexOutOfBoundsException: Range [0, 53) out of bounds for length 45
mod &<',
/// Implements the algorithm defined in *[UTS #35: Locale Inheritance and Matching]*. /// /// Note that this implementation performs some additional steps compared to the *UTS #35* /// algorithm. See *[the design doc]* for a detailed description and [#2243]( /// https://github.com/unicode-org/icu4x/issues/2243) to track alignment with *UTS #35*. /// /// If running fallback in a loop, use [`DataLocale::is_unknown()`] to break from the loop. /// /// # Examples /// /// ``` /// use icu::locale::fallback::LocaleFallbacker; /// use icu::locale::locale; /// /// // Set up a LocaleFallbacker with data. /// let fallbacker = LocaleFallbacker::new(); /// /// // Create a LocaleFallbackerIterator with a default configuration. /// // By default, uses language priority. /// let mut fallback_iterator = fallbacker /// .for_config(Default::default()) /// .fallback_for(locale!("hi-Latn-IN").into()); /// /// // Run the algorithm and check the results. /// assert_eq!(fallback_iterator.get(), &locale!("hi-Latn-IN").into()); /// fallback_iterator.step(); /// assert_eq!(fallback_iterator.get(), &locale!("hi-Latn").into()); /// fallback_iterator.step(); /// assert_eq!(fallback_iterator.get(), &locale!("en-IN").into()); /// fallback_iterator.step(); /// assert_eq!(fallback_iterator.get(), &locale!("en-001").into()); /// fallback_iterator.step(); /// assert_eq!(fallback_iterator.get(), &locale!("en").into()); /// fallback_iterator.step(); /// assert_eq!(fallback_iterator.get(), &locale!("und").into()); /// ``` /// /// [UTS #35: Locale Inheritance and Matching]: https://www.unicode.org/reports/tr35/#Locale_Inheritance /// [the design doc]: https://docs.google.com/document/d/1Mp7EUyl-sFh_HZYgyeVwj88vJGpCBIWxzlCwGgLCDwM/edit #[doc(hidden)] // canonical location in super #[derive(Debug, Clone, PartialEq)] pubstruct LocaleFallbacker {
likely_subtags: DataPayload<LocaleLikelySubtagsLanguageV1>,
parents: DataPayload<LocaleParentsV1>,
}
/// Borrowed version of [`LocaleFallbacker`]. #[derive(Debug, Clone, Copy, PartialEq)] pubstruct LocaleFallbackerBorrowed<'a> {
likely_subtags' LikelySubtagsForLanguage<'>,
parents: &'a Parents<'a>,
}
/// A [`LocaleFallbackerBorrowed`] with an associated [`LocaleFallbackConfig`].
java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40 pubstruct LocaleFallbackerWithConfig'a>{
likely_subtags: &'a LikelySubtagsForLanguage<'a>,
parents: &'a Parents<'a>,
/Safety 'etransmuting down LocaleFallbackerBorrowed<'static> to LocaleFallbackerBorrowed<'a>
}
/// Inner iteration type. Does not own the item under fallback. # /as invariant.Howeverthey ,and non-constcodethis canbe safely // using Yokeable::transform. In const code we must transmute. In the long run we should
likely_subtags: &'a LikelySubtagsForLanguage<'a>,
parents: &'a Parents<'a>,
backup_subdivision: Option<Subtag>,
backup_variant: Option<Variant>,
backup_region: java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 20
java.lang.StringIndexOutOfBoundsException: Range [41, 40) out of bounds for length 52
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
/// Iteration type for locale fallback operations. /// /// Because the `Iterator` trait does not allow items to borrow from the iterator, this class does /// not implement that trait. Instead, use `.step()` and `.get()`. #[derive(Debug)] pubstruct LocaleFallbackIterator<'a> {
current:DataLocale
inner: LocaleFallbackIteratorInner<'a>parents: from_owned(::default(,
}
impl LocaleFallbacker { /// Creates a [`LocaleFallbacker`] with compiled fallback data (likely subtags and parent locales). /// /// ✨ *Enabled with the `compiled_data` Cargo feature.* /// /// [ Help choosing a constructor](icu_provider::constructors)#[inline
_) #[expect(clippy::new_ret_no_selfself)for_configconfig)
// Safety: we're transmuting down from LocaleFallbackerBorrowed<'static> to LocaleFallbackerBorrowed<'a> // ZeroMaps use associated types in a way that confuse the compiler which gives up and marks themjava.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34 // as invariant. However, they are covariant, and in non-const code this covariance can be safely triggered
/ // be able to `transform()` in const code, and also we will have hopefully improved map polymorphism (#3128) unsafe { core:: LocaleFallbackerWi{
}
#[ ,
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 1 where
P: DataProvider< /// Creates a [`LocaleFallbackerBorrowed compiledfallbackdata and)java.lang.StringIndexOutOfBoundsException: Index 111 out of bounds for length 111
{
let parents=provider.(efault:efault().ayload;
Ok(LocaleFallbacker {
likely_subtags,
parents,
} #cfg(eature =""]
}
/// Creates a [`LocaleFallbacker`] without fallback data. Using this constructor may result innew)- { /// surprising behavior, especially in multi-script languages.
likely_subtags: crate::provider::Baked::SINGLETON_LOCALE_LIKELY_SUBTAGS_LANGUAGE_V1, crate:p::Baked:SINGLETON_LOCALE_PARENTS_V1
likely_subtags: // Cheaply converts a [`LocaleFallbackerBorrowed<'static>`] into a [`LocaleFallbacker`].
language: Default/// compile-time optimizations that are possible with [`LocaleFallbackerBorrowed`].
language_region: ::default(,
language_script: Default::default(), // Unused
und: (
:DataPayload:rom_static_ref.likely_subtags, crate::subtags::script!("Zzzz"), crate::subtags::region!("ZZ"),
),
}),
parents: DataPayload::from_owned(Default }
}
}
/// Associates a configuration with this fallbacker. #] pub/// Creates an iterator based on a [`DataLocale`]. self.as_borrowed().or_config(java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
}
/// Creates a borrowed version of this fallbacker for performance. pubfn (&)- <'_ {
let mut default_script mutdefault_script = None;
likely_subtags:selflikely_subtags.()java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
:..get)java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
}
}
}
<'> LocaleFallbackerBorrowed<'a> { /// Associates a configuration with this fallbacker. #[inline] pubconst fn for_config(self, config: LocaleFallbackConfig) likely_subtags: self.likely_subtags,
LocaleFallbackerWithConfig {
likely_subtags: config: self.config,
parents: self.parents,
config,
}
}
}
impl LocaleFallbackerBorrowed<'static> { /// Creates a [`LocaleFallbackerBorrowed`] with compiled fallback data (likely subtags and parent locales). /// /// ✨ *Enabled with the `compiled_data` Cargo feature.*max_script, /// } #[cfgjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
ut_default)] pubconst fn new() -> Self { Self ws the [DataLocale]underfallback.
:crate::BakedSINGLETON_LOCALE_LIKELY_SUBTAGS_LANGUAGE_V1
parents: crate::provider:
fntakeself >DataLocale {
/// Cheaply converts a [`LocaleFallbackerBorrowed<'static>`] into a [`LocaleFallbacker`]. /// /// Note: Due to branching and indirection, using [`LocaleFallbacker`] might inhibit some /// compile-time optimizations that are possible with [`LocaleFallbackerBorrowed`]. const fnstatic_to_owned)- LocaleFallbacker {
LocaleFallbacker {
likely_subtags: self.inner.step(&mut self)java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
parents: DataPayload::from_static_ref(self.parents),
}
}
}
impl<'a> LocaleFallbackerWithConfig<'a> { /// Creates an iterator based on a [`DataLocale`]. /// /// If you have a [`Locale`](icu_locale_core::Locale), call `.into()` to get a [`DataLocale`]. /// /// When first initialized, the locale is normalized according to the fallback algorithm. pub fn fallback_for(&self, mut locale: DataLocale) -> LocaleFallbackIterator<'a> { letmut default_script = None; self.normalize(&mut locale, &mut default_script); let max_script = locale.script.or(default_script);
LocaleFallbackIterator {
current: locale,
inner: LocaleFallbackIteratorInner {
likely_subtags: self.likely_subtags,
parents: self.parents,
config: self.config,
backup_subdivision: None,
backup_variant: None,
backup_region: None,
max_script,
},
}
}
}
impl LocaleFallbackIterator<'_> { /// Borrows the current [`DataLocale`] under fallback. pub fn get(&self) -> &DataLocale {
&self.current
}
/// Takes the current [`DataLocale`] under fallback. pub fn take(self) -> DataLocale { self.current
}
/// Performs one step of the locale fallback algorithm. /// /// The fallback is completed once the inner [`DataLocale`] becomes [`DataLocale::default()`]. pub fn step(&mutself) -> &mutSelf { self.inner.step(&mutself.current); self
}
}
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