Add example for icu_locale

components/locale/examples/langid.rs

@@ -0,0 +1,43 @@
+// Simple app
+use icu_locale::{subtags, LanguageIdentifier};
+
+const LANGIDS: &[&str] = &[
+    "de",
+    "en-US",
+    "zh-Hant",
+    "sr-Cyrl",
+    "fr-CA",
+    "es-CL",
+    "pl",
+    "en-Latn-US",
+    "ca-valencia",
+    "und-Arab",
+];
+
+fn main() {
+    // 1. Parse input strings into LanguageIdentifiers
+    let langids = LANGIDS
+        .iter()
+        .map(|s| s.parse())
+        .collect::<Result<Vec<LanguageIdentifier>, _>>()
+        .expect("Failed to parse Language Identifier");
+
+    {
+        // 2. Filter list of identifiers that match a given Language Identifier.
+        let reference: LanguageIdentifier = "en-US"
+            .parse()
+            .expect("Failed to parse Language Identifier");
+
+        let _matching = langids.iter().filter(|langid| *langid == &reference);
+    }
+
+    {
+        // 3. Filter list of identifiers that match a given language subtag.
+        let reference: subtags::Language = "en".parse().expect("Failed to parse Language");
+
+        let _matching = langids.iter().filter(|langid| langid.language == reference);
+    }
+
+    // 4. Serialize Language Identifiers to a vector of strings.
+    let _canonicalized: Vec<_> = langids.iter().map(|langid| langid.to_string()).collect();
+}