corlib 0.4.1

A various ideas library
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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191

use std::rc::{Rc, Weak};

use super::WeakByPtr;

use std::hash::{Hash, Hasher};

use std::fmt::Debug;

/// A Container for comparing and hashing reference counted values using their pointers.
pub struct RcByPtr<T: ?Sized>
{

    contents: Rc<T>

}

impl<T: ?Sized> RcByPtr<T>
{

    pub fn new(contents: &Rc<T>) -> Self
    {

        Self
        {

            contents: contents.clone()

        }

    }

    pub fn from_weak(rc_contents: &Weak<T>) -> Option<Self>
    {

        if let Some(rc) = rc_contents.upgrade()
        {

            Some(Self
            {
    
                contents: rc
    
            })

        }
        else
        {
         
            None
            
        }

    }

    pub fn from_clone(contents: &Rc<T>) -> Self
    {

        Self
        {

            contents: contents.clone()

        }

    }

    pub fn contents(&self) -> Rc<T>
    {

        self.contents.clone()

    }

    pub fn contents_ref(&self) -> &Rc<T>
    {

        &self.contents

    }

    pub fn downgrade_contents(&self) -> Weak<T>
    {

        Rc::downgrade(&self.contents)

    }

    pub fn downgrade(&self) -> WeakByPtr<T>
    {

        WeakByPtr::new(&Rc::downgrade(&self.contents))

    }

    pub fn take(self) -> Rc<T>
    {

        self.contents

    }

}

impl<T: ?Sized> PartialEq for RcByPtr<T>
{

    fn eq(&self, other: &Self) -> bool
    {

        Rc::ptr_eq(&self.contents, other.contents_ref())

    }

}

impl<T: ?Sized> Eq for RcByPtr<T> {}

impl<T: ?Sized> Hash for RcByPtr<T>
{

    fn hash<H: Hasher>(&self, state: &mut H)
    {

        Rc::as_ptr(&self.contents).hash(state);

    }

}

//#[derive(Clone)] makes it so every generic pramerter down must implement clone for the clone trait implementation to be part of the compiled object. Weird

impl<T: ?Sized> Clone for RcByPtr<T>
{

    fn clone(&self) -> Self
    {

        Self
        {

            contents: self.contents.clone()
        
        }

    }

}

impl<T: ?Sized> PartialOrd for RcByPtr<T>
{

    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering>
    {

        //self.contents.partial_cmp(&other.contents)
    
        //Rc::partial_cmp(&self, other)

        let left = Rc::as_ptr(&self.contents).cast::<()>(); //.partial_cmp(other)

        let right = Rc::as_ptr(other.contents_ref()).cast::<()>();

        left.partial_cmp(&right)

    }

}

impl<T: ?Sized> Ord for RcByPtr<T>
{

    fn cmp(&self, other: &Self) -> std::cmp::Ordering
    {
        
        let left = Rc::as_ptr(&self.contents).cast::<()>();

        let right = Rc::as_ptr(other.contents_ref()).cast::<()>();

        left.cmp(&right)
        
    }

}

impl<T> Debug for RcByPtr<T>
    where T: ?Sized + Debug
{
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("RcByPtr").field("contents", &self.contents).finish()
    }
}