vendor/ucd-parse/src/extracted/derived_bidi_class.rs

   1 use std::path::Path;
   2 use std::str::FromStr;
   3
   4 use crate::common::{
   5     parse_codepoint_association, CodepointIter, Codepoints, UcdFile,
   6     UcdFileByCodepoint,
   7 };
   8 use crate::error::Error;
   9
  10 /// A single row in the `extracted/DerivedBidiClass.txt` file.
  11 ///
  12 /// This file gives the derived values of the Bidi_Class property.
  13 #[derive(Clone, Debug, Default, Eq, PartialEq)]
  14 pub struct DerivedBidiClass {
  15     /// The codepoint or codepoint range for this entry.
  16     pub codepoints: Codepoints,
  17     /// The derived Bidi_Class of the codepoints in this entry.
  18     pub bidi_class: String,
  19 }
  20
  21 impl UcdFile for DerivedBidiClass {
  22     fn relative_file_path() -> &'static Path {
  23         Path::new("extracted/DerivedBidiClass.txt")
  24     }
  25 }
  26
  27 impl UcdFileByCodepoint for DerivedBidiClass {
  28     fn codepoints(&self) -> CodepointIter {
  29         self.codepoints.into_iter()
  30     }
  31 }
  32
  33 impl FromStr for DerivedBidiClass {
  34     type Err = Error;
  35
  36     fn from_str(line: &str) -> Result<DerivedBidiClass, Error> {
  37         let (codepoints, bidi_class) = parse_codepoint_association(line)?;
  38         Ok(DerivedBidiClass { codepoints, bidi_class: bidi_class.to_string() })
  39     }
  40 }
  41
  42 #[cfg(test)]
  43 mod tests {
  44     use super::DerivedBidiClass;
  45
  46     #[test]
  47     fn parse_single() {
  48         let line = "00B5          ; L # L&       MICRO SIGN\n";
  49         let row: DerivedBidiClass = line.parse().unwrap();
  50         assert_eq!(row.codepoints, 0x00B5);
  51         assert_eq!(row.bidi_class, "L");
  52     }
  53
  54     #[test]
  55     fn parse_range() {
  56         let line = "0030..0039    ; EN # Nd  [10] DIGIT ZERO..DIGIT NINE\n";
  57         let row: DerivedBidiClass = line.parse().unwrap();
  58         assert_eq!(row.codepoints, (0x0030, 0x0039));
  59         assert_eq!(row.bidi_class, "EN");
  60     }
  61 }