rustpython-compiler-core 0.2.0

RustPython specific bytecode.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126

use serde::{Deserialize, Serialize};

/// Sourcecode location.
#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
pub struct Location {
    pub(super) row: u32,
    pub(super) column: u32,
}

impl Default for Location {
    fn default() -> Self {
        Self { row: 1, column: 0 }
    }
}

impl Location {
    pub fn fmt_with(
        &self,
        f: &mut std::fmt::Formatter,
        e: &impl std::fmt::Display,
    ) -> std::fmt::Result {
        write!(f, "{} at line {} column {}", e, self.row(), self.column())
    }
}

impl Location {
    /// Creates a new Location object at the given row and column.
    ///
    /// # Example
    /// ```
    /// use rustpython_compiler_core::Location;
    /// let loc = Location::new(10, 10);
    /// ```
    pub fn new(row: usize, column: usize) -> Self {
        let row = row.try_into().expect("Location::row over u32");
        let column = column.try_into().expect("Location::column over u32");
        Location { row, column }
    }

    /// Current row
    pub fn row(&self) -> usize {
        self.row as usize
    }

    /// Current column
    pub fn column(&self) -> usize {
        self.column as usize
    }

    pub fn reset(&mut self) {
        self.row = 1;
        self.column = 0;
    }

    pub fn go_right(&mut self) {
        self.column += 1;
    }

    pub fn go_left(&mut self) {
        self.column -= 1;
    }

    pub fn newline(&mut self) {
        self.row += 1;
        self.column = 0;
    }

    pub fn with_col_offset<T: TryInto<isize>>(&self, offset: T) -> Self
    where
        <T as TryInto<isize>>::Error: std::fmt::Debug,
    {
        let column = (self.column as isize
            + offset
                .try_into()
                .expect("offset should be able to convert to isize")) as u32;
        Self {
            row: self.row,
            column,
        }
    }

    pub fn with_row_offset<T: TryInto<isize>>(&self, offset: T) -> Self
    where
        <T as TryInto<isize>>::Error: std::fmt::Debug,
    {
        let row = (self.row as isize
            + offset
                .try_into()
                .expect("offset should be able to convert to isize")) as u32;
        Self {
            row,
            column: self.column,
        }
    }
}

#[cfg(test)]
mod tests {
    use crate::Location;

    #[test]
    fn test_gt() {
        assert!(Location::new(1, 2) > Location::new(1, 1));
        assert!(Location::new(2, 1) > Location::new(1, 1));
        assert!(Location::new(2, 1) > Location::new(1, 2));
    }

    #[test]
    fn test_lt() {
        assert!(Location::new(1, 1) < Location::new(1, 2));
        assert!(Location::new(1, 1) < Location::new(2, 1));
        assert!(Location::new(1, 2) < Location::new(2, 1));
    }

    #[test]
    fn test_with_col_offset() {
        assert_eq!(Location::new(1, 1).with_col_offset(1), Location::new(1, 2));
        assert_eq!(Location::new(1, 1).with_col_offset(-1), Location::new(1, 0));
    }

    #[test]
    fn test_with_row_offset() {
        assert_eq!(Location::new(1, 1).with_row_offset(1), Location::new(2, 1));
        assert_eq!(Location::new(1, 1).with_row_offset(-1), Location::new(0, 1));
    }
}