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# IntlMemoizer
`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`, DateTimeFormat` etc. between all `FluentBundle` instances.
Usage
-----
```rust
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);
}
```
Get Involved
------------
`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.
Discuss
-------
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.
- Discourse: https://discourse.mozilla.org/c/fluent
- IRC channel: [irc://irc.mozilla.org/l20n](irc://irc.mozilla.org/l20n)
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