chore: checkpoint before Python removal

vendor/litemap/examples/language_names_lite_map.rs

@@ -0,0 +1,36 @@
+// This file is part of ICU4X. For terms of use, please see the file
+// called LICENSE at the top level of the ICU4X source tree
+// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
+
+// LiteMap is intended as a small and low-memory drop-in replacement for HashMap.
+//
+// The reader may compare this LiteMap example with the HashMap example to see analogous
+// operations between LiteMap and HashMap.
+
+#![no_main] // https://github.com/unicode-org/icu4x/issues/395
+icu_benchmark_macros::instrument!();
+
+use icu_locale_core::subtags::{language, Language};
+use litemap::LiteMap;
+
+const DATA: [(Language, &str); 11] = [
+    (language!("ar"), "Arabic"),
+    (language!("bn"), "Bangla"),
+    (language!("ccp"), "Chakma"),
+    (language!("en"), "English"),
+    (language!("es"), "Spanish"),
+    (language!("fr"), "French"),
+    (language!("ja"), "Japanese"),
+    (language!("ru"), "Russian"),
+    (language!("sr"), "Serbian"),
+    (language!("th"), "Thai"),
+    (language!("tr"), "Turkish"),
+];
+
+fn main() {
+    let map = LiteMap::<Language, &str>::from_iter(DATA);
+
+    assert!(map.len() == 11);
+    assert!(map.get(&language!("th")) == Some(&"Thai"));
+    assert!(map.get(&language!("de")).is_none());
+}