reval/expr/
keywords.rs

1use unicode_xid::UnicodeXID;
2
3/// Reserved keywords
4const KEYWORDS: [&str; 38] = [
5    "and",
6    "or",
7    "if",
8    "then",
9    "else",
10    "is_some",
11    "is_none",
12    "some",
13    "int",
14    "float",
15    "dec",
16    "true",
17    "false",
18    "none",
19    "contains",
20    "in",
21    "to_upper",
22    "to_lower",
23    "uppercase",
24    "lowercase",
25    "starts",
26    "ends",
27    "trim",
28    "round",
29    "floor",
30    "fract",
31    "date_time",
32    "datetime",
33    "duration",
34    "year",
35    "month",
36    "week",
37    "day",
38    "hour",
39    "minute",
40    "second",
41    "key",
42    "val",
43];
44
45pub(crate) fn is_reserved_keyword(name: &str) -> bool {
46    KEYWORDS.contains(&name)
47}
48
49pub(crate) fn is_valid_identifier(name: &str) -> bool {
50    let mut chars = name.chars();
51    match chars.next() {
52        Some(start) => {
53            start == '_' || start.is_xid_start() && chars.all(UnicodeXID::is_xid_continue)
54        }
55        None => false,
56    }
57}
58
59#[cfg(test)]
60mod when_testing_identifier {
61    use crate::expr::keywords::is_valid_identifier;
62
63    #[test]
64    fn should_allow_leading_underscore() {
65        assert!(is_valid_identifier("_id"));
66    }
67
68    #[test]
69    fn should_allow_leading_letter() {
70        assert!(is_valid_identifier("id"));
71    }
72
73    #[test]
74    fn should_disallow_leading_number() {
75        assert!(!is_valid_identifier("1id"));
76    }
77
78    #[test]
79    fn should_allow_trailing_number() {
80        assert!(is_valid_identifier("id1"));
81    }
82}
reval/expr/keywords.rs

reval/expr/
keywords.rs
