dcbor_pattern/pattern/meta/
any_pattern.rs

1use dcbor::prelude::*;
2
3use crate::pattern::{Matcher, Path, Pattern, vm::Instr};
4
5/// A pattern that always matches any CBOR value.
6#[derive(Debug, Clone, Hash, PartialEq, Eq)]
7pub struct AnyPattern;
8
9impl AnyPattern {
10    /// Creates a new `AnyPattern`.
11    pub fn new() -> Self { AnyPattern }
12}
13
14impl Default for AnyPattern {
15    fn default() -> Self { Self::new() }
16}
17
18impl Matcher for AnyPattern {
19    fn paths(&self, haystack: &CBOR) -> Vec<Path> {
20        // Always matches - return the current CBOR value as a path
21        vec![vec![haystack.clone()]]
22    }
23
24    fn paths_with_captures(
25        &self,
26        haystack: &CBOR,
27    ) -> (Vec<Path>, std::collections::HashMap<String, Vec<Path>>) {
28        // AnyPattern has no internal captures, so just return paths and empty
29        // captures
30        (self.paths(haystack), std::collections::HashMap::new())
31    }
32
33    fn compile(
34        &self,
35        code: &mut Vec<Instr>,
36        _literals: &mut Vec<Pattern>,
37        _captures: &mut Vec<String>,
38    ) {
39        // Any pattern always matches - just save the current path
40        code.push(Instr::Save);
41    }
42
43    fn collect_capture_names(&self, _names: &mut Vec<String>) {
44        // AnyPattern doesn't contain captures
45    }
46}
47
48impl std::fmt::Display for AnyPattern {
49    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
50        write!(f, "*")
51    }
52}
53
54#[cfg(test)]
55mod tests {
56    use super::*;
57
58    #[test]
59    fn test_any_pattern_display() {
60        let pattern = AnyPattern::new();
61        assert_eq!(pattern.to_string(), "*");
62    }
63
64    #[test]
65    fn test_any_pattern_matches_everything() {
66        let pattern = AnyPattern::new();
67
68        // Should match all kinds of CBOR values
69        assert!(pattern.matches(&CBOR::from(42)));
70        assert!(pattern.matches(&CBOR::from("hello")));
71        assert!(pattern.matches(&CBOR::from(true)));
72        assert!(pattern.matches(&CBOR::from(vec![1, 2, 3])));
73        assert!(pattern.matches(&CBOR::null()));
74    }
75
76    #[test]
77    fn test_any_pattern_paths() {
78        let pattern = AnyPattern::new();
79        let cbor = CBOR::from("test");
80        let paths = pattern.paths(&cbor);
81
82        assert_eq!(paths.len(), 1);
83        assert_eq!(paths[0], vec![cbor]);
84    }
85}
dcbor_pattern/pattern/meta/any_pattern.rs

dcbor_pattern/pattern/meta/
any_pattern.rs
