lutra-compiler 0.6.0

Compiler for Lutra query language
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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169

use chumsky::prelude::*;
use insta::assert_debug_snapshot;
use insta::assert_snapshot;

use crate::pr::Literal;

use super::{LError, lexer, literal, quoted_string};

#[track_caller]
fn _lex<'src, T>(
    parser: impl Parser<'src, &'src str, T, extra::Err<LError>>,
    source: &'src str,
) -> T {
    parser.parse(source).into_result().unwrap()
}

#[track_caller]
fn _lex_err<'src, T: std::fmt::Debug>(
    parser: impl Parser<'src, &'src str, T, extra::Err<LError>>,
    source: &'src str,
) -> Vec<LError> {
    parser.parse(source).into_result().unwrap_err()
}

#[test]
fn line_wrap() {
    assert_debug_snapshot!(_lex(lexer(), r"5 +
      3 "
        ), @r#"
    [
        0..1: Literal(Number("5")),
        2..3: Control('+'),
        3..4: NewLine,
        10..11: Literal(Number("3")),
    ]
    "#);

    assert_debug_snapshot!(_lex(lexer(), r"5 +
# comment
   # comment with whitespace
    3 "
        ), @r#"
    [
        0..1: Literal(Number("5")),
        2..3: Control('+'),
        3..4: NewLine,
        4..13: Comment("comment"),
        13..14: NewLine,
        17..42: Comment("comment with whitespace"),
        42..43: NewLine,
        47..48: Literal(Number("3")),
    ]
    "#);
}

#[test]
fn numbers() {
    // Binary notation
    assert_eq!(
        _lex(literal(), "0b1111000011110000"),
        Literal::Number("0b1111000011110000".into())
    );
    assert_eq!(
        _lex(literal(), "0b_1111000011110000"),
        Literal::Number("0b_1111000011110000".into())
    );

    // Hexadecimal notation
    assert_eq!(_lex(literal(), "0xff"), Literal::Number("0xff".into()));
    assert_eq!(
        _lex(literal(), "0x_deadbeef"),
        Literal::Number("0x_deadbeef".into())
    );

    // Octal notation
    assert_eq!(_lex(literal(), "0o777"), Literal::Number("0o777".into()));
}

#[test]
fn debug_display() {
    assert_debug_snapshot!(_lex(lexer(), "5 + 3"), @r#"
    [
        0..1: Literal(Number("5")),
        2..3: Control('+'),
        4..5: Literal(Number("3")),
    ]
    "#);
}

#[test]
fn doc_comment() {
    assert_debug_snapshot!(_lex(lexer(), "## docs"), @r#"
    [
        0..7: DocComment("docs"),
    ]
    "#);
}

#[test]
fn quotes() {
    // All these are valid & equal.
    assert_snapshot!(_lex(quoted_string(false), r#""aoeu""#), @"aoeu");
    assert_snapshot!(_lex(quoted_string(false), r#""""aoeu""""#), @"aoeu");
    assert_snapshot!(_lex(quoted_string(false), r#""""""aoeu""""""#), @"aoeu");
    assert_snapshot!(_lex(quoted_string(false), r#""""""""aoeu""""""""#), @"aoeu");

    // An even number is interpreted as a closed string (and the remainder is unparsed)
    assert_debug_snapshot!(_lex_err(quoted_string(false), r#"""aoeu"""#), @"
    [
        at 2..3,
    ]
    ");

    // When not escaping, we take the inner string between the three quotes
    assert_snapshot!(_lex(quoted_string(false), r#""""\"hello\""""#), @r#"\"hello\"#);

    assert_snapshot!(_lex(quoted_string(true), r#""""\"hello\"""""#), @r#""hello""#);

    // Escape each inner quote depending on the outer quote
    assert_snapshot!(_lex(quoted_string(true), r#""\"hello\"""#), @r#""hello""#);
    assert_snapshot!(_lex(quoted_string(true), r#""\"hello\"""#), @r#""hello""#);

    assert_snapshot!(_lex(quoted_string(true), r#""""#), @"");

    // An empty input should fail
    _lex_err(quoted_string(false), r#""#);

    // An even number of quotes is an empty string
    assert_snapshot!(_lex(quoted_string(true), r#""""""""#), @"");

    // Hex escape
    assert_snapshot!(_lex(quoted_string(true), r#""\x61\x62\x63""#), @"abc");

    // Unicode escape
    assert_snapshot!(_lex(quoted_string(true), r#""\u{01f422}""#), @"🐢");
}

#[test]
fn range() {
    assert_debug_snapshot!(_lex(lexer(), "1..2"), @r#"
    [
        0..1: Literal(Number("1")),
        1..3: Range,
        3..4: Literal(Number("2")),
    ]
    "#);

    assert_debug_snapshot!(_lex(lexer(), "..2"), @r#"
    [
        0..2: Range,
        2..3: Literal(Number("2")),
    ]
    "#);

    assert_debug_snapshot!(_lex(lexer(), "1.."), @r#"
    [
        0..1: Literal(Number("1")),
        1..3: Range,
    ]
    "#);

    assert_debug_snapshot!(_lex(lexer(), "in ..5"), @r#"
    [
        0..2: Keyword("in"),
        3..5: Range,
        5..6: Literal(Number("5")),
    ]
    "#);
}