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
pub mod borrowed;
pub mod owned;
pub mod tape;
pub use self::borrowed::{
to_value as to_borrowed_value, to_value_with_buffers as to_borrowed_value_with_buffers,
Value as BorrowedValue,
};
pub use self::owned::{
to_value as to_owned_value, to_value_with_buffers as to_owned_value_with_buffers,
Value as OwnedValue,
};
use crate::{Deserializer, Result};
use halfbrown::HashMap;
use std::hash::Hash;
use std::marker::PhantomData;
use tape::Node;
pub use value_trait::*;
pub fn deserialize<'de, Value, Key>(s: &'de mut [u8]) -> Result<Value>
where
Value: Builder<'de> + From<Vec<Value>> + From<HashMap<Key, Value>> + 'de,
Key: Hash + Eq + From<&'de str>,
{
match Deserializer::from_slice(s) {
Ok(de) => Ok(ValueDeserializer::from_deserializer(de).parse()),
Err(e) => Err(e),
}
}
struct ValueDeserializer<'de, Value, Key>
where
Value: Builder<'de> + From<Vec<Value>> + From<HashMap<Key, Value>> + 'de,
Key: Hash + Eq + From<&'de str>,
{
de: Deserializer<'de>,
_marker: PhantomData<(Value, Key)>,
}
impl<'de, Value, Key> ValueDeserializer<'de, Value, Key>
where
Value: Builder<'de> + From<&'de str> + From<Vec<Value>> + From<HashMap<Key, Value>> + 'de,
Key: Hash + Eq + From<&'de str>,
{
pub fn from_deserializer(de: Deserializer<'de>) -> Self {
Self {
de,
_marker: PhantomData::default(),
}
}
#[cfg_attr(not(feature = "no-inline"), inline(always))]
pub fn parse(&mut self) -> Value {
match unsafe { self.de.next_() } {
Node::Static(s) => Value::from(s),
Node::String(s) => Value::from(s),
Node::Array(len, _) => self.parse_array(len),
Node::Object(len, _) => self.parse_map(len),
}
}
#[cfg_attr(not(feature = "no-inline"), inline(always))]
fn parse_array(&mut self, len: usize) -> Value {
let mut res = Vec::with_capacity(len);
unsafe {
res.set_len(len);
for i in 0..len {
std::ptr::write(res.get_unchecked_mut(i), self.parse());
}
}
Value::from(res)
}
#[cfg_attr(not(feature = "no-inline"), inline(always))]
fn parse_map(&mut self, len: usize) -> Value {
let mut res: HashMap<Key, Value> = HashMap::with_capacity(len);
for _ in 0..len {
if let Node::String(key) = unsafe { self.de.next_() } {
res.insert_nocheck(key.into(), self.parse());
} else {
unreachable!()
}
}
Value::from(res)
}
}