serde_urlencoded/ser/
key.rs

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1use crate::ser::part::Sink;
2use crate::ser::Error;
3use serde::Serialize;
4use std::borrow::Cow;
5use std::ops::Deref;
6
7pub enum Key<'key> {
8    Static(&'static str),
9    Dynamic(Cow<'key, str>),
10}
11
12impl<'key> Deref for Key<'key> {
13    type Target = str;
14
15    fn deref(&self) -> &str {
16        match *self {
17            Key::Static(key) => key,
18            Key::Dynamic(ref key) => key,
19        }
20    }
21}
22
23impl<'key> From<Key<'key>> for Cow<'static, str> {
24    fn from(key: Key<'key>) -> Self {
25        match key {
26            Key::Static(key) => key.into(),
27            Key::Dynamic(key) => key.into_owned().into(),
28        }
29    }
30}
31
32pub struct KeySink<End> {
33    end: End,
34}
35
36impl<End, Ok> KeySink<End>
37where
38    End: for<'key> FnOnce(Key<'key>) -> Result<Ok, Error>,
39{
40    pub fn new(end: End) -> Self {
41        KeySink { end }
42    }
43}
44
45impl<End, Ok> Sink for KeySink<End>
46where
47    End: for<'key> FnOnce(Key<'key>) -> Result<Ok, Error>,
48{
49    type Ok = Ok;
50
51    fn serialize_static_str(self, value: &'static str) -> Result<Ok, Error> {
52        (self.end)(Key::Static(value))
53    }
54
55    fn serialize_str(self, value: &str) -> Result<Ok, Error> {
56        (self.end)(Key::Dynamic(value.into()))
57    }
58
59    fn serialize_string(self, value: String) -> Result<Ok, Error> {
60        (self.end)(Key::Dynamic(value.into()))
61    }
62
63    fn serialize_none(self) -> Result<Ok, Error> {
64        Err(self.unsupported())
65    }
66
67    fn serialize_some<T: ?Sized + Serialize>(
68        self,
69        _value: &T,
70    ) -> Result<Ok, Error> {
71        Err(self.unsupported())
72    }
73
74    fn unsupported(self) -> Error {
75        Error::Custom("unsupported key".into())
76    }
77}
serde_urlencoded/ser/key.rs

serde_urlencoded/ser/
key.rs
