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/DerivedJoiningGroup.txt` file.
12///
13/// This file gives the derived values of the Joining_Group property.
14#[derive(Clone, Debug, Default, Eq, PartialEq)]
15pub struct DerivedJoiningGroup {
16 /// The codepoint or codepoint range for this entry.
17 pub codepoints: Codepoints,
18 /// The derived Joining_Group of the codepoints in this entry.
19 pub joining_group: String,
20}
21
22impl UcdFile for DerivedJoiningGroup {
23 fn relative_file_path() -> &'static Path {
24 Path::new("extracted/DerivedJoiningGroup.txt")
25 }
26}
27
28impl UcdFileByCodepoint for DerivedJoiningGroup {
29 fn codepoints(&self) -> CodepointIter {
30 self.codepoints.into_iter()
31 }
32}
33
34impl std::str::FromStr for DerivedJoiningGroup {
35 type Err = Error;
36
37 fn from_str(line: &str) -> Result<DerivedJoiningGroup, Error> {
38 let (codepoints: Codepoints, joining_group: &str) = parse_codepoint_association(line)?;
39 Ok(DerivedJoiningGroup {
40 codepoints,
41 joining_group: joining_group.to_string(),
42 })
43 }
44}
45
46#[cfg(test)]
47mod tests {
48 use super::DerivedJoiningGroup;
49
50 #[test]
51 fn parse_single() {
52 let line = "0710 ; Alaph # Lo SYRIAC LETTER ALAPH\n";
53 let row: DerivedJoiningGroup = line.parse().unwrap();
54 assert_eq!(row.codepoints, 0x0710);
55 assert_eq!(row.joining_group, "Alaph");
56 }
57
58 #[test]
59 fn parse_range() {
60 let line = "0633..0634 ; Seen # Lo [2] ARABIC LETTER SEEN..ARABIC LETTER SHEEN\n";
61 let row: DerivedJoiningGroup = line.parse().unwrap();
62 assert_eq!(row.codepoints, (0x0633, 0x0634));
63 assert_eq!(row.joining_group, "Seen");
64 }
65}
66