| use rustc_data_structures::fx::FxHashMap; |
| |
| #[derive(Debug)] |
| pub struct InvalidErrorCode; |
| |
| #[derive(Clone)] |
| pub struct Registry { |
| long_descriptions: FxHashMap<&'static str, Option<&'static str>>, |
| } |
| |
| impl Registry { |
| pub fn new(long_descriptions: &[(&'static str, Option<&'static str>)]) -> Registry { |
| Registry { long_descriptions: long_descriptions.iter().copied().collect() } |
| } |
| |
| /// This will panic if an invalid error code is passed in |
| pub fn find_description(&self, code: &str) -> Option<&'static str> { |
| self.long_descriptions[code] |
| } |
| /// Returns `InvalidErrorCode` if the code requested does not exist in the |
| /// registry. Otherwise, returns an `Option` where `None` means the error |
| /// code is valid but has no extended information. |
| pub fn try_find_description( |
| &self, |
| code: &str, |
| ) -> Result<Option<&'static str>, InvalidErrorCode> { |
| self.long_descriptions.get(code).copied().ok_or(InvalidErrorCode) |
| } |
| } |