lang_interpreter/lexer/
code_position.rs

1use std::cmp::Ordering;
2use std::fmt::{Display, Formatter};
3
4#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
5pub struct CodePosition {
6    line_number_from: isize,
7    line_number_to: isize,
8    column_from: isize,
9    column_to: isize,
10}
11
12impl CodePosition {
13    pub const EMPTY: CodePosition = CodePosition {
14        line_number_from: -1, line_number_to: -1, column_from: -1, column_to: -1,
15    };
16
17    pub fn new(line_number_from: isize, line_number_to: isize, column_from: isize, column_to: isize) -> Self {
18        Self { line_number_from, line_number_to, column_from, column_to }
19    }
20
21    #[must_use]
22    pub fn combine(&self, code_position: &CodePosition) -> CodePosition {
23        if *self == Self::EMPTY || *code_position == Self::EMPTY {
24            return Self::EMPTY;
25        }
26
27        let column_from = match self.line_number_from.cmp(&code_position.line_number_from) {
28            Ordering::Equal => self.column_from.min(code_position.column_from),
29            Ordering::Less => self.column_from,
30            Ordering::Greater => code_position.column_from,
31        };
32
33        let column_to = match self.line_number_to.cmp(&code_position.line_number_to) {
34            Ordering::Equal => self.column_to.max(code_position.column_to),
35            Ordering::Greater => self.column_to,
36            Ordering::Less => code_position.column_to,
37        };
38
39        Self::new(
40            self.line_number_from.min(code_position.line_number_from),
41            self.line_number_to.min(code_position.line_number_to),
42            column_from,
43            column_to,
44        )
45    }
46
47    pub fn to_compact_string(&self) -> String {
48        format!(
49            "{}:{}-{}:{}",
50            self.line_number_from, self.column_from,
51
52            self.line_number_to, self.column_to,
53        )
54    }
55
56    pub fn line_number_from(&self) -> isize {
57        self.line_number_from
58    }
59
60    pub fn line_number_to(&self) -> isize {
61        self.line_number_to
62    }
63
64    pub fn column_from(&self) -> isize {
65        self.column_from
66    }
67
68    pub fn column_to(&self) -> isize {
69        self.column_to
70    }
71}
72
73impl Display for CodePosition {
74    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
75        write!(
76            f, "{:5}:{:3} - {:5}:{:3}",
77            self.line_number_from, self.column_from,
78
79            self.line_number_to, self.column_to,
80        )
81    }
82}
lang_interpreter/lexer/code_position.rs

lang_interpreter/lexer/
code_position.rs
