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
|
use ser::{Error};
use serde::ser::{SerializeSeq, SerializeStruct};
use ser::part::Sink;
use serde::Serialize;
use std::borrow::Cow;
use std::ops::Deref;
pub enum Key<'key> {
Static(&'static str),
Dynamic(Cow<'key, str>),
}
impl<'key> Deref for Key<'key> {
type Target = str;
fn deref(&self) -> &str {
match *self {
Key::Static(key) => key,
Key::Dynamic(ref key) => key,
}
}
}
impl<'key> From<Key<'key>> for Cow<'static, str> {
fn from(key: Key<'key>) -> Self {
match key {
Key::Static(key) => key.into(),
Key::Dynamic(key) => key.into_owned().into(),
}
}
}
pub struct KeySink<End> {
end: End,
}
impl<End, Ok> KeySink<End>
where End: for<'key> FnOnce(Key<'key>) -> Result<Ok, Error>
{
pub fn new(end: End) -> Self {
KeySink { end: end }
}
}
impl<End, Ok> Sink<Ok, Error> for KeySink<End>
where End: for<'key> FnOnce(Key<'key>) -> Result<Ok, Error>
{
fn serialize_static_str(self,
value: &'static str)
-> Result<Ok, Error> {
(self.end)(Key::Static(value))
}
fn serialize_str(self, value: &str) -> Result<Ok, Error> {
(self.end)(Key::Dynamic(value.into()))
}
fn serialize_string(self, value: String) -> Result<Ok, Error> {
(self.end)(Key::Dynamic(value.into()))
}
fn serialize_none(self) -> Result<Ok, Error> {
Err(self.unsupported())
}
fn serialize_some<T: ?Sized + Serialize>(self,
_value: &T)
-> Result<Ok, Error> {
Err(self.unsupported())
}
fn unsupported(&self) -> Error {
Error::Custom("unsupported key".into())
}
}
impl<End, Ok> SerializeStruct for KeySink<End>
where End: for<'key> FnOnce(Key<'key>) -> Result<Ok, Error>
{
type Ok = Ok;
type Error = Error;
fn serialize_field<T: ?Sized + Serialize>(&mut self,
_key: &'static str,
_value: &T)
-> Result<(), Error> {
Err(self.unsupported())
}
fn end(self) -> Result<Self::Ok, Error> {
Err(self.unsupported())
}
}
impl<End, Ok> SerializeSeq for KeySink<End>
where End: for<'key> FnOnce(Key<'key>) -> Result<Ok, Error>
{
type Ok = Ok;
type Error = Error;
fn serialize_element<T: ?Sized + Serialize>(&mut self,
_value: &T)
-> Result<(), Error> {
Err(self.unsupported())
}
fn end(self) -> Result<Self::Ok, Error> {
Err(self.unsupported())
}
}
|
