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

use crate::IndexMap;
use core::fmt::{self, Formatter};
use core::marker::PhantomData;
use serde::de::value::{MapDeserializer, SeqDeserializer};
use serde::de::{
    Deserialize, Deserializer, Error, IntoDeserializer, MapAccess, SeqAccess, Visitor,
};
use serde::ser::{Serialize, Serializer};

/// Requires crate feature `"serde"`
impl<K, V> Serialize for IndexMap<K, V>
where
    K: Serialize + Ord,
    V: Serialize,
{
    fn serialize<T>(&self, serializer: T) -> Result<T::Ok, T::Error>
    where
        T: Serializer,
    {
        serializer.collect_map(self)
    }
}

struct IndexMapVisitor<K, V>(PhantomData<(K, V)>);

impl<'de, K, V> Visitor<'de> for IndexMapVisitor<K, V>
where
    K: Deserialize<'de> + Ord + Clone,
    V: Deserialize<'de>,
{
    type Value = IndexMap<K, V>;

    fn expecting(&self, formatter: &mut Formatter<'_>) -> fmt::Result {
        write!(formatter, "a map")
    }

    fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
    where
        A: MapAccess<'de>,
    {
        let mut values = IndexMap::with_capacity(map.size_hint().unwrap_or(0));
        while let Some((key, value)) = map.next_entry()? {
            values.insert(key, value);
        }
        Ok(values)
    }
}

/// Requires crate feature `"serde"`
impl<'de, K, V> Deserialize<'de> for IndexMap<K, V>
where
    K: Deserialize<'de> + Ord + Clone,
    V: Deserialize<'de>,
{
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: Deserializer<'de>,
    {
        deserializer.deserialize_map(IndexMapVisitor(PhantomData))
    }
}

impl<'de, K, V, E> IntoDeserializer<'de, E> for IndexMap<K, V>
where
    K: IntoDeserializer<'de, E> + Ord,
    V: IntoDeserializer<'de, E>,
    E: Error,
{
    type Deserializer = MapDeserializer<'de, <Self as IntoIterator>::IntoIter, E>;

    fn into_deserializer(self) -> Self::Deserializer {
        MapDeserializer::new(self.into_iter())
    }
}

use crate::IndexSet;

/// Requires crate feature `"serde"`
impl<T> Serialize for IndexSet<T>
where
    T: Serialize + Ord,
{
    fn serialize<Se>(&self, serializer: Se) -> Result<Se::Ok, Se::Error>
    where
        Se: Serializer,
    {
        serializer.collect_seq(self)
    }
}

struct IndexSetVisitor<T>(PhantomData<T>);

impl<'de, T> Visitor<'de> for IndexSetVisitor<T>
where
    T: Deserialize<'de> + Ord + Clone,
{
    type Value = IndexSet<T>;

    fn expecting(&self, formatter: &mut Formatter<'_>) -> fmt::Result {
        write!(formatter, "a set")
    }

    fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
    where
        A: SeqAccess<'de>,
    {
        let mut values = IndexSet::with_capacity(seq.size_hint().unwrap_or(0));
        while let Some(value) = seq.next_element()? {
            values.insert(value);
        }
        Ok(values)
    }
}

/// Requires crate feature `"serde"`
impl<'de, T> Deserialize<'de> for IndexSet<T>
where
    T: Deserialize<'de> + Ord + Clone,
{
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: Deserializer<'de>,
    {
        deserializer.deserialize_seq(IndexSetVisitor(PhantomData))
    }
}

impl<'de, T, E> IntoDeserializer<'de, E> for IndexSet<T>
where
    T: IntoDeserializer<'de, E> + Ord,
    E: Error,
{
    type Deserializer = SeqDeserializer<<Self as IntoIterator>::IntoIter, E>;

    fn into_deserializer(self) -> Self::Deserializer {
        SeqDeserializer::new(self.into_iter())
    }
}