wallee 0.2.0

Flexible concrete Error type built on std::error::Error with caller location tracking
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

use alloc::boxed::Box;
use core::marker::PhantomData;
use core::ptr::NonNull;

#[repr(transparent)]
pub struct OwnPtr<T>
where
    T: ?Sized,
{
    pub ptr: NonNull<T>,
}

unsafe impl<T> Send for OwnPtr<T> where T: ?Sized {}

unsafe impl<T> Sync for OwnPtr<T> where T: ?Sized {}

impl<T> Copy for OwnPtr<T> where T: ?Sized {}

impl<T> Clone for OwnPtr<T>
where
    T: ?Sized,
{
    fn clone(&self) -> Self {
        *self
    }
}

impl<T> OwnPtr<T>
where
    T: ?Sized,
{
    pub fn new(ptr: Box<T>) -> Self {
        OwnPtr {
            ptr: unsafe { NonNull::new_unchecked(Box::into_raw(ptr)) },
        }
    }

    pub fn from_raw(ptr: NonNull<T>) -> Self {
        OwnPtr { ptr }
    }

    pub fn cast<U: CastTo>(self) -> OwnPtr<U::Target> {
        OwnPtr {
            ptr: self.ptr.cast(),
        }
    }

    pub unsafe fn boxed(self) -> Box<T> {
        unsafe { Box::from_raw(self.ptr.as_ptr()) }
    }

    pub fn as_ptr(&self) -> *mut T {
        self.ptr.as_ptr()
    }

    pub fn as_ref(&self) -> RefPtr<T> {
        RefPtr {
            ptr: self.ptr,
            lifetime: PhantomData,
        }
    }

    pub fn as_mut(&mut self) -> MutPtr<T> {
        MutPtr {
            ptr: self.ptr,
            lifetime: PhantomData,
        }
    }

    pub fn deref<'a>(&self) -> &'a T {
        unsafe { self.ptr.as_ref() }
    }

    pub fn deref_mut<'a>(&mut self) -> &'a mut T {
        unsafe { self.ptr.as_mut() }
    }
}

#[repr(transparent)]
pub struct RefPtr<'a, T>
where
    T: ?Sized,
{
    pub ptr: NonNull<T>,
    lifetime: PhantomData<&'a T>,
}

impl<'a, T> Copy for RefPtr<'a, T> where T: ?Sized {}

impl<'a, T> Clone for RefPtr<'a, T>
where
    T: ?Sized,
{
    fn clone(&self) -> Self {
        *self
    }
}

impl<'a, T> RefPtr<'a, T>
where
    T: ?Sized,
{
    pub fn new(ptr: &'a T) -> Self {
        RefPtr {
            ptr: NonNull::from(ptr),
            lifetime: PhantomData,
        }
    }

    pub fn cast<U: CastTo>(self) -> RefPtr<'a, U::Target> {
        RefPtr {
            ptr: self.ptr.cast(),
            lifetime: PhantomData,
        }
    }

    pub fn as_ref(self) -> &'a T {
        unsafe { self.ptr.as_ref() }
    }
}

#[repr(transparent)]
pub struct MutPtr<'a, T>
where
    T: ?Sized,
{
    pub ptr: NonNull<T>,
    lifetime: PhantomData<&'a mut T>,
}

impl<'a, T> Copy for MutPtr<'a, T> where T: ?Sized {}

impl<'a, T> Clone for MutPtr<'a, T>
where
    T: ?Sized,
{
    fn clone(&self) -> Self {
        *self
    }
}

impl<'a, T> MutPtr<'a, T>
where
    T: ?Sized,
{
    pub fn cast<U: CastTo>(self) -> MutPtr<'a, U::Target> {
        MutPtr {
            ptr: self.ptr.cast(),
            lifetime: PhantomData,
        }
    }

    pub fn as_mut(&mut self) -> &'a mut T {
        unsafe { self.ptr.as_mut() }
    }
}

// Force turbofish on all calls of `.cast::<U>()`.
pub trait CastTo {
    type Target;
}

impl<T> CastTo for T {
    type Target = T;
}