srdf/
matcher.rs

1pub struct Any;
2
3pub trait Matcher<T>: PartialEq<T> {
4    fn value(&self) -> Option<T>;
5}
6
7impl<T> Matcher<T> for Any {
8    fn value(&self) -> Option<T> {
9        None
10    }
11}
12
13impl<T> PartialEq<T> for Any {
14    fn eq(&self, _other: &T) -> bool {
15        true
16    }
17}
18
19// pub enum Matcher<R: Rdf> {
20//     Variable(String),
21//     Term(R::Term),
22// }
23
24// impl<R: Rdf> PartialEq for Matcher<R> {
25//     fn eq(&self, other: &Self) -> bool {
26//         match (self, other) {
27//             (Matcher::Variable(_), _) | (_, Matcher::Variable(_)) => true,
28//             (Matcher::Term(t1), Matcher::Term(t2)) => t1 == t2,
29//         }
30//     }
31// }
32
33// impl<R: Rdf> From<Any> for Matcher<R> {
34//     #[inline]
35//     fn from(_value: Any) -> Self {
36//         Matcher::Variable("_".to_string())
37//     }
38// }
39
40// impl<I, R> From<I> for Matcher<R>
41// where
42//     R: Rdf,
43//     I: Into<R::Term>,
44//     I: Clone, // TODO: check this
45// {
46//     fn from(value: I) -> Self {
47//         Matcher::Term(value.into())
48//     }
49// }
50
51// impl<R: Rdf> std::fmt::Display for Matcher<R> {
52//     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
53//         match self {
54//             Matcher::Variable(var) => write!(f, "?{}", var),
55//             Matcher::Term(term) => write!(f, "{}", term),
56//         }
57//     }
58// }
srdf/matcher.rs

srdf/
matcher.rs
