1 files changed, 37 insertions, 0 deletions
diff --git a/vendor/icu_locid/src/extensions/other/subtag.rs b/vendor/icu_locid/src/extensions/other/subtag.rs
new file mode 100644
index 000000000..60995c395
--- /dev/null
+++ b/vendor/icu_locid/src/extensions/other/subtag.rs
@@ -0,0 +1,37 @@
+// 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 ).
+
+impl_tinystr_subtag!(
+    /// A single item used in a list of [`Other`](super::Other) extensions.
+    ///
+    /// The subtag has to be an ASCII alphanumerical string no shorter than
+    /// two characters and no longer than eight.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use icu::locid::extensions::other::Subtag;
+    ///
+    /// let subtag: Subtag = "Foo".parse().expect("Failed to parse a Subtag.");
+    ///
+    /// assert_eq!(subtag.as_str(), "foo");
+    /// ```
+    Subtag,
+    extensions::other::Subtag,
+    extensions_other_subtag,
+    2..=8,
+    s,
+    s.is_ascii_alphanumeric(),
+    s.to_ascii_lowercase(),
+    s.is_ascii_alphanumeric() && s.is_ascii_lowercase(),
+    InvalidExtension,
+    ["foo12"],
+    ["y", "toolooong"],
+);
+
+impl Subtag {
+    pub(crate) const fn valid_key(v: &[u8]) -> bool {
+        2 <= v.len() && v.len() <= 8
+    }
+}