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
use crate::class::methods::PyMethodDef;
use crate::err::PyResult;
use crate::{PyClass, PyObject};
#[allow(unused_variables)]
pub trait PyContextProtocol<'p>: PyClass {
fn __enter__(&'p mut self) -> Self::Result
where
Self: PyContextEnterProtocol<'p>,
{
unimplemented!()
}
fn __exit__(
&'p mut self,
exc_type: Option<Self::ExcType>,
exc_value: Option<Self::ExcValue>,
traceback: Option<Self::Traceback>,
) -> Self::Result
where
Self: PyContextExitProtocol<'p>,
{
unimplemented!()
}
}
pub trait PyContextEnterProtocol<'p>: PyContextProtocol<'p> {
type Success: crate::IntoPy<PyObject>;
type Result: Into<PyResult<Self::Success>>;
}
pub trait PyContextExitProtocol<'p>: PyContextProtocol<'p> {
type ExcType: crate::FromPyObject<'p>;
type ExcValue: crate::FromPyObject<'p>;
type Traceback: crate::FromPyObject<'p>;
type Success: crate::IntoPy<PyObject>;
type Result: Into<PyResult<Self::Success>>;
}
#[doc(hidden)]
pub trait PyContextProtocolImpl {
fn methods() -> Vec<PyMethodDef>;
}
impl<T> PyContextProtocolImpl for T {
default fn methods() -> Vec<PyMethodDef> {
Vec::new()
}
}
impl<'p, T> PyContextProtocolImpl for T
where
T: PyContextProtocol<'p>,
{
#[inline]
fn methods() -> Vec<PyMethodDef> {
let mut methods = Vec::new();
if let Some(def) = <Self as PyContextEnterProtocolImpl>::__enter__() {
methods.push(def)
}
if let Some(def) = <Self as PyContextExitProtocolImpl>::__exit__() {
methods.push(def)
}
methods
}
}
#[doc(hidden)]
pub trait PyContextEnterProtocolImpl {
fn __enter__() -> Option<PyMethodDef>;
}
impl<'p, T> PyContextEnterProtocolImpl for T
where
T: PyContextProtocol<'p>,
{
default fn __enter__() -> Option<PyMethodDef> {
None
}
}
#[doc(hidden)]
pub trait PyContextExitProtocolImpl {
fn __exit__() -> Option<PyMethodDef>;
}
impl<'p, T> PyContextExitProtocolImpl for T
where
T: PyContextProtocol<'p>,
{
default fn __exit__() -> Option<PyMethodDef> {
None
}
}