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/DerivedLineBreak.txt` file.
12///
13/// This file gives the derived values of the Line_Break property.
14#[derive(Clone, Debug, Default, Eq, PartialEq)]
15pub struct DerivedLineBreak {
16 /// The codepoint or codepoint range for this entry.
17 pub codepoints: Codepoints,
18 /// The derived Line_Break of the codepoints in this entry.
19 pub line_break: String,
20}
21
22impl UcdFile for DerivedLineBreak {
23 fn relative_file_path() -> &'static Path {
24 Path::new("extracted/DerivedLineBreak.txt")
25 }
26}
27
28impl UcdFileByCodepoint for DerivedLineBreak {
29 fn codepoints(&self) -> CodepointIter {
30 self.codepoints.into_iter()
31 }
32}
33
34impl std::str::FromStr for DerivedLineBreak {
35 type Err = Error;
36
37 fn from_str(line: &str) -> Result<DerivedLineBreak, Error> {
38 let (codepoints: Codepoints, line_break: &str) = parse_codepoint_association(line)?;
39 Ok(DerivedLineBreak { codepoints, line_break: line_break.to_string() })
40 }
41}
42
43#[cfg(test)]
44mod tests {
45 use super::DerivedLineBreak;
46
47 #[test]
48 fn parse_single() {
49 let line = "0028 ; OP # Ps LEFT PARENTHESIS\n";
50 let row: DerivedLineBreak = line.parse().unwrap();
51 assert_eq!(row.codepoints, 0x0028);
52 assert_eq!(row.line_break, "OP");
53 }
54
55 #[test]
56 fn parse_range() {
57 let line = "0030..0039 ; NU # Nd [10] DIGIT ZERO..DIGIT NINE\n";
58 let row: DerivedLineBreak = line.parse().unwrap();
59 assert_eq!(row.codepoints, (0x0030, 0x0039));
60 assert_eq!(row.line_break, "NU");
61 }
62}
63