icu_locid/extensions/other/
subtag.rs

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
5impl_tinystr_subtag!(
6    /// A single item used in a list of [`Other`](super::Other) extensions.
7    ///
8    /// The subtag has to be an ASCII alphanumerical string no shorter than
9    /// two characters and no longer than eight.
10    ///
11    /// # Examples
12    ///
13    /// ```
14    /// use icu::locid::extensions::other::subtag;
15    ///
16    /// assert_eq!(subtag!("Foo").as_str(), "foo");
17    /// ```
18    Subtag,
19    extensions::other,
20    subtag,
21    extensions_other_subtag,
22    2..=8,
23    s,
24    s.is_ascii_alphanumeric(),
25    s.to_ascii_lowercase(),
26    s.is_ascii_alphanumeric() && s.is_ascii_lowercase(),
27    InvalidExtension,
28    ["foo12"],
29    ["y", "toolooong"],
30);
31
32impl Subtag {
33    pub(crate) const fn valid_key(v: &[u8]) -> bool {
34        2 <= v.len() && v.len() <= 8
35    }
36}