LibJS: Compare Unicode locale variants using case-insensitive matching

In the IsStructurallyValidLanguageTag AO, we of course cannot assume the variants are canonicalized to lower-case yet, because canonicalization hasn't happened yet.
Author: https://github.com/trflynn89 Commit: 940c023e09 Pull-request: https://github.com/SerenityOS/serenity/pull/9749 Reviewed-by: https://github.com/linusg ✅
2025-07-29 12:19:54 +00:00 · 2021-09-01 18:54:30 -04:00 · 2021-09-01 18:54:30 -04:00 · 940c023e09 · 2024-07-18 04:53:26 +09:00
commit 940c023e09
parent fdedb3ab33
2 changed files with 8 additions and 1 deletions
--- a/Userland/Libraries/LibJS/Runtime/Intl/AbstractOperations.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Intl/AbstractOperations.cpp
@ -26,7 +26,7 @@ static Optional<Unicode::LocaleID> is_structurally_valid_language_tag(StringView
        quick_sort(variants);

        for (size_t i = 0; i < variants.size() - 1; ++i) {
-            if (variants[i] == variants[i + 1])
+            if (variants[i].equals_ignoring_case(variants[i + 1]))
                return true;
        }