1 files changed, 34 insertions, 0 deletions
diff --git a/vendor/icu_locid/src/extensions/unicode/attribute.rs b/vendor/icu_locid/src/extensions/unicode/attribute.rs
new file mode 100644
index 000000000..ba4b70924
--- /dev/null
+++ b/vendor/icu_locid/src/extensions/unicode/attribute.rs
@@ -0,0 +1,34 @@
+// 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!(
+    /// An attribute used in a set of [`Attributes`](super::Attributes).
+    ///
+    /// An attribute has to be a sequence of alphanumerical characters no
+    /// shorter than three and no longer than eight characters.
+    ///
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use icu::locid::extensions::unicode::Attribute;
+    /// use icu::locid::extensions_unicode_attribute as attribute;
+    ///
+    /// let attr: Attribute =
+    ///     "buddhist".parse().expect("Failed to parse an Attribute.");
+    ///
+    /// assert_eq!(attr, attribute!("buddhist"));
+    /// ```
+    Attribute,
+    extensions::unicode::Attribute,
+    extensions_unicode_attribute,
+    3..=8,
+    s,
+    s.is_ascii_alphanumeric(),
+    s.to_ascii_lowercase(),
+    s.is_ascii_alphanumeric() && s.is_ascii_lowercase(),
+    InvalidExtension,
+    ["foo12"],
+    ["no", "toolooong"],
+);