Struct icu_locale::fallback::LocaleFallbackConfig

#[non_exhaustive]
pub struct LocaleFallbackConfig { pub priority: LocaleFallbackPriority, }
Expand description

Configuration settings for a particular fallback operation.

Fields (Non-exhaustive)§

This struct is marked as non-exhaustive
Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.
§priority: LocaleFallbackPriority

Strategy for choosing which subtags to drop during locale fallback.

§Examples

Retain the language and script subtags until the final step:

use icu::locale::fallback::LocaleFallbackConfig;
use icu::locale::fallback::LocaleFallbackPriority;
use icu::locale::locale;
use icu::locale::LocaleFallbacker;

// Set up the fallback iterator.
let fallbacker = LocaleFallbacker::new();
let mut config = LocaleFallbackConfig::default();
config.priority = LocaleFallbackPriority::Language;
let mut fallback_iterator = fallbacker
    .for_config(config)
    .fallback_for(locale!("ca-ES-valencia").into());

// Run the algorithm and check the results.
assert_eq!(fallback_iterator.get(), &locale!("ca-ES-valencia").into());
fallback_iterator.step();
assert_eq!(fallback_iterator.get(), &locale!("ca-ES").into());
fallback_iterator.step();
assert_eq!(fallback_iterator.get(), &locale!("ca-valencia").into());
fallback_iterator.step();
assert_eq!(fallback_iterator.get(), &locale!("ca").into());
fallback_iterator.step();
assert_eq!(fallback_iterator.get(), &locale!("und").into());

Retain the region subtag until the final step:

use icu::locale::fallback::LocaleFallbackConfig;
use icu::locale::fallback::LocaleFallbackPriority;
use icu::locale::locale;
use icu::locale::LocaleFallbacker;

// Set up the fallback iterator.
let fallbacker = LocaleFallbacker::new();
let mut config = LocaleFallbackConfig::default();
config.priority = LocaleFallbackPriority::Region;
let mut fallback_iterator = fallbacker
    .for_config(config)
    .fallback_for(locale!("ca-ES-valencia").into());

// Run the algorithm and check the results.
assert_eq!(fallback_iterator.get(), &locale!("ca-ES-valencia").into());
fallback_iterator.step();
assert_eq!(fallback_iterator.get(), &locale!("ca-ES").into());
fallback_iterator.step();
assert_eq!(fallback_iterator.get(), &locale!("und-ES-valencia").into());
fallback_iterator.step();
assert_eq!(fallback_iterator.get(), &locale!("und-ES").into());
fallback_iterator.step();
assert_eq!(fallback_iterator.get(), &locale!("und").into());

Implementations§

Trait Implementations§

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impl Clone for LocaleFallbackConfig

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fn clone(&self) -> LocaleFallbackConfig

Returns a copy of the value. Read more
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for LocaleFallbackConfig

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl Default for LocaleFallbackConfig

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fn default() -> LocaleFallbackConfig

Returns the “default value” for a type. Read more
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impl PartialEq for LocaleFallbackConfig

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fn eq(&self, other: &LocaleFallbackConfig) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for LocaleFallbackConfig

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impl Eq for LocaleFallbackConfig

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impl StructuralPartialEq for LocaleFallbackConfig

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