Struct Catalog 

pub struct Catalog { /* private fields */ }

An app-populated translation table: key → (language code → string), with a default language used as a fallback. Build it once from string literals (e.g. behind a OnceLock) and read it in view.

Lookups fall back in two steps — the requested language, then the default language, then the key itself — so a missing translation degrades to something readable rather than blank.

Implementations

impl Catalog

pub fn new(default_lang: &str) -> Self

A new, empty catalog whose default_lang is the fallback when a requested language is missing.

pub fn with( self, key: &'static str, langs: &[(&'static str, &'static str)], ) -> Self

Add (or extend) the translations for key. Chainable, for building the catalog inline.

use mobiler_core::i18n::Catalog;
let c = Catalog::new("en")
    .with("hello", &[("en", "Hello"), ("uk", "Привіт")])
    .with("bye", &[("en", "Bye"), ("uk", "Бувай")]);
assert_eq!(c.tr("hello", "uk"), "Привіт");

pub fn tr<'a>(&'a self, key: &'a str, lang: &str) -> &'a str

Translate key into lang, falling back to the default language, then to key itself.

Trait Implementations

impl Clone for Catalog

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Catalog

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

Formats the value using the given formatter.

impl Default for Catalog

fn default() -> Self

Returns the “default value” for a type.