vortex_array/
arcref.rs

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1use std::cmp::Ordering;
2use std::fmt::{Debug, Display};
3use std::hash::Hash;
4use std::ops::Deref;
5use std::sync::Arc;
6
7/// Either a reference-counted `Arc` or a static reference to a value.
8pub struct ArcRef<T: ?Sized + 'static>(Inner<T>);
9
10enum Inner<T: ?Sized + 'static> {
11    Arc(Arc<T>),
12    Ref(&'static T),
13}
14
15impl<T: ?Sized> ArcRef<T> {
16    pub fn new_arc(t: Arc<T>) -> Self
17    where
18        T: 'static,
19    {
20        ArcRef(Inner::Arc(t))
21    }
22
23    pub const fn new_ref(t: &'static T) -> Self {
24        ArcRef(Inner::Ref(t))
25    }
26}
27
28impl<T: ?Sized> Clone for ArcRef<T> {
29    fn clone(&self) -> Self {
30        match &self.0 {
31            Inner::Arc(arc) => ArcRef(Inner::Arc(Arc::clone(arc))),
32            Inner::Ref(r) => ArcRef(Inner::Ref(*r)),
33        }
34    }
35}
36
37impl<T: ?Sized> From<&'static T> for ArcRef<T> {
38    fn from(r: &'static T) -> Self {
39        ArcRef(Inner::Ref(r))
40    }
41}
42
43impl<T: 'static> From<T> for ArcRef<T> {
44    fn from(t: T) -> Self {
45        ArcRef(Inner::Arc(Arc::new(t)))
46    }
47}
48
49impl<T: ?Sized + 'static> From<Arc<T>> for ArcRef<T> {
50    fn from(arc: Arc<T>) -> Self {
51        ArcRef(Inner::Arc(arc))
52    }
53}
54
55impl<T: ?Sized> Deref for ArcRef<T> {
56    type Target = T;
57
58    fn deref(&self) -> &Self::Target {
59        match &self.0 {
60            Inner::Arc(arc) => arc,
61            Inner::Ref(r) => r,
62        }
63    }
64}
65
66impl<S, T> PartialEq<ArcRef<S>> for ArcRef<T>
67where
68    S: ?Sized + 'static,
69    T: ?Sized + 'static + PartialEq<S>,
70{
71    fn eq(&self, other: &ArcRef<S>) -> bool {
72        self.deref() == other.deref()
73    }
74}
75
76impl<T> Eq for ArcRef<T> where T: ?Sized + 'static + Eq {}
77
78impl<S, T> PartialOrd<ArcRef<S>> for ArcRef<T>
79where
80    S: ?Sized + 'static,
81    T: ?Sized + 'static + PartialOrd<S>,
82{
83    fn partial_cmp(&self, other: &ArcRef<S>) -> Option<Ordering> {
84        self.deref().partial_cmp(other.deref())
85    }
86}
87
88impl<T> Ord for ArcRef<T>
89where
90    T: ?Sized + 'static + Ord,
91{
92    fn cmp(&self, other: &Self) -> Ordering {
93        self.deref().cmp(other.deref())
94    }
95}
96
97impl<T> Hash for ArcRef<T>
98where
99    T: ?Sized + 'static + Hash,
100{
101    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
102        self.deref().hash(state)
103    }
104}
105
106impl<T> Debug for ArcRef<T>
107where
108    T: ?Sized + 'static + Debug,
109{
110    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
111        self.deref().fmt(f)
112    }
113}
114
115impl<T> Display for ArcRef<T>
116where
117    T: ?Sized + 'static + Display,
118{
119    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
120        self.deref().fmt(f)
121    }
122}
123
124impl<T: ?Sized + 'static> AsRef<T> for ArcRef<T> {
125    fn as_ref(&self) -> &T {
126        self
127    }
128}
vortex_array/arcref.rs

vortex_array/
arcref.rs
