ucd_parse/extracted/
derived_combining_class.rs

1use std::path::Path;
2
3use crate::{
4    common::{
5        parse_codepoint_association, CodepointIter, Codepoints, UcdFile,
6        UcdFileByCodepoint,
7    },
8    error::Error,
9};
10
11/// A single row in the `extracted/DerivedCombiningClass.txt` file.
12///
13/// This file gives the derived values of the Canonical_Combining_Class
14/// property.
15#[derive(Clone, Debug, Default, Eq, PartialEq)]
16pub struct DerivedCombiningClass {
17    /// The codepoint or codepoint range for this entry.
18    pub codepoints: Codepoints,
19    /// The derived Canonical_Combining_Class of the codepoints in this entry.
20    pub combining_class: String,
21}
22
23impl UcdFile for DerivedCombiningClass {
24    fn relative_file_path() -> &'static Path {
25        Path::new("extracted/DerivedCombiningClass.txt")
26    }
27}
28
29impl UcdFileByCodepoint for DerivedCombiningClass {
30    fn codepoints(&self) -> CodepointIter {
31        self.codepoints.into_iter()
32    }
33}
34
35impl std::str::FromStr for DerivedCombiningClass {
36    type Err = Error;
37
38    fn from_str(line: &str) -> Result<DerivedCombiningClass, Error> {
39        let (codepoints, combining_class) = parse_codepoint_association(line)?;
40        Ok(DerivedCombiningClass {
41            codepoints,
42            combining_class: combining_class.to_string(),
43        })
44    }
45}
46
47#[cfg(test)]
48mod tests {
49    use super::DerivedCombiningClass;
50
51    #[test]
52    fn parse_single() {
53        let line = "0020          ; 0 # Zs       SPACE\n";
54        let row: DerivedCombiningClass = line.parse().unwrap();
55        assert_eq!(row.codepoints, 0x0020);
56        assert_eq!(row.combining_class, "0");
57    }
58
59    #[test]
60    fn parse_range() {
61        let line =  "1DD1..1DF5    ; 230 # Mn  [37] COMBINING UR ABOVE..COMBINING UP TACK ABOVE\n";
62        let row: DerivedCombiningClass = line.parse().unwrap();
63        assert_eq!(row.codepoints, (0x1DD1, 0x1DF5));
64        assert_eq!(row.combining_class, "230");
65    }
66}
ucd_parse/extracted/derived_combining_class.rs

ucd_parse/extracted/
derived_combining_class.rs
