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 | impl_tinystr_subtag!( |
6 | /// A variant subtag (examples: `"macos"`, `"posix"`, `"1996"` etc.) |
7 | /// |
8 | /// [`Variant`] represents a Unicode base language code conformant to the |
9 | /// [`unicode_variant_id`] field of the Language and Locale Identifier. |
10 | /// |
11 | /// # Examples |
12 | /// |
13 | /// ``` |
14 | /// use icu::locid::subtags::Variant; |
15 | /// |
16 | /// let variant: Variant = |
17 | /// "macos".parse().expect("Failed to parse a variant subtag."); |
18 | /// ``` |
19 | /// |
20 | /// [`unicode_variant_id`]: https://unicode.org/reports/tr35/#unicode_variant_id |
21 | Variant, |
22 | subtags, |
23 | variant, |
24 | subtags_variant, |
25 | 4..=8, |
26 | s, |
27 | s.is_ascii_alphanumeric() && (s.len() != 4 || s.all_bytes()[0].is_ascii_digit()), |
28 | s.to_ascii_lowercase(), |
29 | s.is_ascii_lowercase() |
30 | && s.is_ascii_alphanumeric() |
31 | && (s.len() != 4 || s.all_bytes()[0].is_ascii_digit()), |
32 | InvalidSubtag, |
33 | ["posix" , "1996" ], |
34 | ["yes" ], |
35 | ); |
36 | |