intl-memoizer is a crate designed to handle lazy-initialized references to intl formatters.
The assumption is that allocating a new formatter instance is costly, and such instance is read-only during its life time, with constructor being expensive, and format/select calls being cheap.
In result it pays off to use a singleton to manage memoization of all instances of intl APIs such as PluralRules, DateTimeFormatetc. between allFluentBundle` instances.
use intl_memoizer::{IntlMemoizer, Memoizable}; use unic_langid::langid; use intl_pluralrules::{PluralRules, PluralRuleType, PluralCategory}; impl Memoizable for PluralRules { type Args = (PluralRulesType,); fn construct(lang: LanguageIdentifier, args: Self::Args) -> Self { Self::new(lang, args.0) } } fn main() { let lang = langid!("en-US"); // A single memoizer for all languages let mut memoizer = IntlMemoizer::new(); // A RefCell for a particular language to be used in all `FluentBundle` // instances. let mut en_us_memoizer = memoizer.get_for_lang(lang.clone()); // Per-call borrow let mut en_us_memoizer_borrow = en_us_memoizer.borrow_mut(); let cb = en_us_memoizer_borrow.get::<PluralRules>((PluralRulesType::Cardinal,)); assert_eq!(cb.select(1), PluralCategory::One); }
fluent-rs is open-source, licensed under the Apache License, Version 2.0. We encourage everyone to take a look at our code and we'll listen to your feedback.
We‘d love to hear your thoughts on Project Fluent! Whether you’re a localizer looking for a better way to express yourself in your language, or a developer trying to make your app localizable and multilingual, or a hacker looking for a project to contribute to, please do get in touch on the mailing list and the IRC channel.