1 // This file is part of ICU4X. For terms of use, please see the file
2 // called LICENSE at the top level of the ICU4X source tree
3 // (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
4
5 // A sample application which takes a comma separated list of language identifiers,
6 // filters out identifiers with language subtags different than `en` and serializes
7 // the list back into a comma separated list in canonical syntax.
8 //
9 // Note: This is an example of the API use, and is not a good base for language matching.
10 // For language matching, please consider algorithms such as Locale Matcher.
11
12 #![no_main] // https://github.com/unicode-org/icu4x/issues/395
13 icu_benchmark_macros::instrument!();
14 use icu_benchmark_macros::println;
15
16 use std::env;
17
18 use icu_locale_core::{subtags, LanguageIdentifier};
19
20 const DEFAULT_INPUT: &str =
21 "de, en-us, zh-hant, sr-cyrl, fr-ca, es-cl, pl, en-latn-us, ca-valencia, und-arab";
22
main()23 fn main() {
24 for input in env::args()
25 .nth(1)
26 .as_deref()
27 .unwrap_or(DEFAULT_INPUT)
28 .split(',')
29 .map(str::trim)
30 {
31 // 1. Parse the input string into a language identifier.
32 let Ok(langid) = LanguageIdentifier::try_from_str(input) else {
33 continue;
34 };
35 // 2. Filter for LanguageIdentifiers with Language subtag `en`.
36 if langid.language == subtags::language!("en") {
37 println!("✅ {}", langid)
38 } else {
39 println!("❌ {}", langid)
40 }
41 }
42 }
43