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

use crate::{ByteArray, Bytes};
use serde::Serializer;

#[cfg(any(feature = "std", feature = "alloc"))]
use crate::ByteBuf;

#[cfg(feature = "alloc")]
use alloc::borrow::Cow;
#[cfg(all(feature = "std", not(feature = "alloc")))]
use std::borrow::Cow;

#[cfg(feature = "alloc")]
use alloc::boxed::Box;

#[cfg(feature = "alloc")]
use alloc::vec::Vec;

/// Types that can be serialized via `#[serde(with = "serde_bytes")]`.
pub trait Serialize {
    #[allow(missing_docs)]
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer;
}

impl Serialize for [u8] {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        serializer.serialize_bytes(self)
    }
}

#[cfg(any(feature = "std", feature = "alloc"))]
impl Serialize for Vec<u8> {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        serializer.serialize_bytes(self)
    }
}

impl Serialize for Bytes {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        serializer.serialize_bytes(self)
    }
}

impl<const N: usize> Serialize for [u8; N] {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        serializer.serialize_bytes(self)
    }
}

impl<const N: usize> Serialize for ByteArray<N> {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        serializer.serialize_bytes(&**self)
    }
}

#[cfg(any(feature = "std", feature = "alloc"))]
impl Serialize for ByteBuf {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        serializer.serialize_bytes(self)
    }
}

#[cfg(any(feature = "std", feature = "alloc"))]
impl<'a> Serialize for Cow<'a, [u8]> {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        serializer.serialize_bytes(self)
    }
}

#[cfg(any(feature = "std", feature = "alloc"))]
impl<'a> Serialize for Cow<'a, Bytes> {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        serializer.serialize_bytes(self)
    }
}

impl<'a, T> Serialize for &'a T
where
    T: ?Sized + Serialize,
{
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        (**self).serialize(serializer)
    }
}

#[cfg(any(feature = "std", feature = "alloc"))]
impl<T> Serialize for Box<T>
where
    T: ?Sized + Serialize,
{
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        (**self).serialize(serializer)
    }
}

impl<T> Serialize for Option<T>
where
    T: Serialize,
{
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        struct AsBytes<T>(T);

        impl<T> serde::Serialize for AsBytes<T>
        where
            T: Serialize,
        {
            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
            where
                S: Serializer,
            {
                self.0.serialize(serializer)
            }
        }

        match self {
            Some(b) => serializer.serialize_some(&AsBytes(b)),
            None => serializer.serialize_none(),
        }
    }
}