| // 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 region subtag (examples: `"US"`, `"CN"`, `"AR"` etc.) |
| /// |
| /// [`Region`] represents a Unicode base language code conformant to the |
| /// [`unicode_region_id`] field of the Language and Locale Identifier. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use icu::locid::subtags::Region; |
| /// |
| /// let region: Region = |
| /// "DE".parse().expect("Failed to parse a region subtag."); |
| /// ``` |
| /// |
| /// [`unicode_region_id`]: https://unicode.org/reports/tr35/#unicode_region_id |
| Region, |
| subtags, |
| region, |
| subtags_region, |
| 2..=3, |
| s, |
| if s.len() == 2 { |
| s.is_ascii_alphabetic() |
| } else { |
| s.is_ascii_numeric() |
| }, |
| if s.len() == 2 { |
| s.to_ascii_uppercase() |
| } else { |
| s |
| }, |
| if s.len() == 2 { |
| s.is_ascii_alphabetic_uppercase() |
| } else { |
| s.is_ascii_numeric() |
| }, |
| InvalidSubtag, |
| ["FR", "123"], |
| ["12", "FRA", "b2"], |
| ); |
| |
| impl Region { |
| /// Returns true if the Region has an alphabetic code. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use icu::locid::subtags::Region; |
| /// |
| /// let region = Region::try_from_bytes(b"us").expect("Parsing failed."); |
| /// |
| /// assert!(region.is_alphabetic()); |
| /// ``` |
| pub fn is_alphabetic(&self) -> bool { |
| self.0.len() == 2 |
| } |
| } |