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
166
167
168
|
// This file is part of ICU4X. For terms of use, please see the file
// called LICENSE at the top level of the ICU4X source tree
// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
// @@@@@@@@@@@@@@@@
// THIS FILE IS SHARED BETWEEN LITEMAP AND ZEROVEC. PLEASE KEEP IT IN SYNC FOR ALL EDITS
// @@@@@@@@@@@@@@@@
use serde::ser::{Impossible, Serialize, Serializer};
pub fn is_num_or_string<T: Serialize + ?Sized>(k: &T) -> bool {
// Serializer that errors in the same cases as serde_json::ser::MapKeySerializer
struct MapKeySerializerDryRun;
impl Serializer for MapKeySerializerDryRun {
type Ok = ();
// Singleton error type that implements serde::ser::Error
type Error = core::fmt::Error;
type SerializeSeq = Impossible<(), Self::Error>;
type SerializeTuple = Impossible<(), Self::Error>;
type SerializeTupleStruct = Impossible<(), Self::Error>;
type SerializeTupleVariant = Impossible<(), Self::Error>;
type SerializeMap = Impossible<(), Self::Error>;
type SerializeStruct = Impossible<(), Self::Error>;
type SerializeStructVariant = Impossible<(), Self::Error>;
fn serialize_str(self, _value: &str) -> Result<Self::Ok, Self::Error> {
Ok(())
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
) -> Result<Self::Ok, Self::Error> {
Ok(())
}
fn serialize_newtype_struct<T: Serialize + ?Sized>(
self,
_name: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error> {
// Recurse
value.serialize(self)
}
fn serialize_bool(self, _value: bool) -> Result<Self::Ok, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_i8(self, _value: i8) -> Result<Self::Ok, Self::Error> {
Ok(())
}
fn serialize_i16(self, _value: i16) -> Result<Self::Ok, Self::Error> {
Ok(())
}
fn serialize_i32(self, _value: i32) -> Result<Self::Ok, Self::Error> {
Ok(())
}
fn serialize_i64(self, _value: i64) -> Result<Self::Ok, Self::Error> {
Ok(())
}
serde::serde_if_integer128! {
fn serialize_i128(self, _value: i128) -> Result<Self::Ok, Self::Error> {
Ok(())
}
}
fn serialize_u8(self, _value: u8) -> Result<Self::Ok, Self::Error> {
Ok(())
}
fn serialize_u16(self, _value: u16) -> Result<Self::Ok, Self::Error> {
Ok(())
}
fn serialize_u32(self, _value: u32) -> Result<Self::Ok, Self::Error> {
Ok(())
}
fn serialize_u64(self, _value: u64) -> Result<Self::Ok, Self::Error> {
Ok(())
}
serde::serde_if_integer128! {
fn serialize_u128(self, _value: u128) -> Result<Self::Ok, Self::Error> {
Ok(())
}
}
fn serialize_f32(self, _value: f32) -> Result<Self::Ok, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_f64(self, _value: f64) -> Result<Self::Ok, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_char(self, _value: char) -> Result<Self::Ok, Self::Error> {
Ok(())
}
fn serialize_bytes(self, _value: &[u8]) -> Result<Self::Ok, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_newtype_variant<T: Serialize + ?Sized>(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_value: &T,
) -> Result<Self::Ok, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_some<T: Serialize + ?Sized>(
self,
_value: &T,
) -> Result<Self::Ok, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_tuple_struct(
self,
_name: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleStruct, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleVariant, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_struct(
self,
_name: &'static str,
_len: usize,
) -> Result<Self::SerializeStruct, Self::Error> {
Err(core::fmt::Error)
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize,
) -> Result<Self::SerializeStructVariant, Self::Error> {
Err(core::fmt::Error)
}
fn collect_str<T: core::fmt::Display + ?Sized>(
self,
_value: &T,
) -> Result<Self::Ok, Self::Error> {
Ok(())
}
}
k.serialize(MapKeySerializerDryRun).is_ok()
}
|
