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/DerivedBinaryProperties.txt` file.
12///
13/// This file indicates whether a codepoint has the Bidi_Mirrored property.
14#[derive(Clone, Debug, Default, Eq, PartialEq)]
15pub struct DerivedBinaryProperties {
16 /// The codepoint or codepoint range for this entry.
17 pub codepoints: Codepoints,
18 /// The derived property of the codepoints in this entry. Currently,
19 /// this is always the always the string "Bidi_Mirrored".
20 pub property: String,
21}
22
23impl UcdFile for DerivedBinaryProperties {
24 fn relative_file_path() -> &'static Path {
25 Path::new("extracted/DerivedBinaryProperties.txt")
26 }
27}
28
29impl UcdFileByCodepoint for DerivedBinaryProperties {
30 fn codepoints(&self) -> CodepointIter {
31 self.codepoints.into_iter()
32 }
33}
34
35impl std::str::FromStr for DerivedBinaryProperties {
36 type Err = Error;
37
38 fn from_str(line: &str) -> Result<DerivedBinaryProperties, Error> {
39 let (codepoints: Codepoints, property: &str) = parse_codepoint_association(line)?;
40 Ok(DerivedBinaryProperties {
41 codepoints,
42 property: property.to_string(),
43 })
44 }
45}
46
47#[cfg(test)]
48mod tests {
49 use super::DerivedBinaryProperties;
50
51 #[test]
52 fn parse_single() {
53 let line =
54 "0028 ; Bidi_Mirrored # Ps LEFT PARENTHESIS\n";
55 let row: DerivedBinaryProperties = line.parse().unwrap();
56 assert_eq!(row.codepoints, 0x0028);
57 assert_eq!(row.property, "Bidi_Mirrored");
58 }
59
60 #[test]
61 fn parse_range() {
62 let line = "2A3C..2A3E ; Bidi_Mirrored # Sm [3] INTERIOR PRODUCT..Z NOTATION RELATIONAL COMPOSITION\n";
63 let row: DerivedBinaryProperties = line.parse().unwrap();
64 assert_eq!(row.codepoints, (0x2A3C, 0x2A3E));
65 assert_eq!(row.property, "Bidi_Mirrored");
66 }
67}
68