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``fallbacker::ffi``
===================
.. cpp:struct:: ICU4XLocaleFallbackConfig
Collection of configurations for the ICU4X fallback algorithm.
See the `Rust documentation for LocaleFallbackConfig <https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbackConfig.html>`__ for more information.
.. cpp:member:: ICU4XLocaleFallbackPriority priority
Choice of priority mode.
.. cpp:member:: std::string_view extension_key
An empty string is considered ``None``.
.. cpp:member:: ICU4XLocaleFallbackSupplement fallback_supplement
Fallback supplement data key to customize fallback rules.
.. cpp:class:: ICU4XLocaleFallbackIterator
An iterator over the locale under fallback.
See the `Rust documentation for LocaleFallbackIterator <https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbackIterator.html>`__ for more information.
.. cpp:function:: ICU4XLocale get() const
Gets a snapshot of the current state of the locale.
See the `Rust documentation for get <https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbackIterator.html#method.get>`__ for more information.
.. cpp:function:: void step()
Performs one step of the fallback algorithm, mutating the locale.
See the `Rust documentation for step <https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbackIterator.html#method.step>`__ for more information.
.. cpp:enum-struct:: ICU4XLocaleFallbackPriority
Priority mode for the ICU4X fallback algorithm.
See the `Rust documentation for LocaleFallbackPriority <https://docs.rs/icu/latest/icu/locid_transform/fallback/enum.LocaleFallbackPriority.html>`__ for more information.
.. cpp:enumerator:: Language
.. cpp:enumerator:: Region
.. cpp:enumerator:: Collation
.. cpp:enum-struct:: ICU4XLocaleFallbackSupplement
What additional data is required to load when performing fallback.
See the `Rust documentation for LocaleFallbackSupplement <https://docs.rs/icu/latest/icu/locid_transform/fallback/enum.LocaleFallbackSupplement.html>`__ for more information.
.. cpp:enumerator:: None
.. cpp:enumerator:: Collation
.. cpp:class:: ICU4XLocaleFallbacker
An object that runs the ICU4X locale fallback algorithm.
See the `Rust documentation for LocaleFallbacker <https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbacker.html>`__ for more information.
.. cpp:function:: static diplomat::result<ICU4XLocaleFallbacker, ICU4XError> create(const ICU4XDataProvider& provider)
Creates a new ``ICU4XLocaleFallbacker`` from a data provider.
See the `Rust documentation for new <https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbacker.html#method.new>`__ for more information.
.. cpp:function:: static ICU4XLocaleFallbacker create_without_data()
Creates a new ``ICU4XLocaleFallbacker`` without data for limited functionality.
See the `Rust documentation for new_without_data <https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbacker.html#method.new_without_data>`__ for more information.
.. cpp:function:: diplomat::result<ICU4XLocaleFallbackerWithConfig, ICU4XError> for_config(ICU4XLocaleFallbackConfig config) const
Associates this ``ICU4XLocaleFallbacker`` with configuration options.
See the `Rust documentation for for_config <https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbacker.html#method.for_config>`__ for more information.
Lifetimes: ``this`` must live at least as long as the output.
.. cpp:class:: ICU4XLocaleFallbackerWithConfig
An object that runs the ICU4X locale fallback algorithm with specific configurations.
See the `Rust documentation for LocaleFallbacker <https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbacker.html>`__ for more information.
See the `Rust documentation for LocaleFallbackerWithConfig <https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbackerWithConfig.html>`__ for more information.
.. cpp:function:: ICU4XLocaleFallbackIterator fallback_for_locale(const ICU4XLocale& locale) const
Creates an iterator from a locale with each step of fallback.
See the `Rust documentation for fallback_for <https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbacker.html#method.fallback_for>`__ for more information.
Lifetimes: ``this`` must live at least as long as the output.
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