solana_binary_encoder/
option_serializer.rs

1use serde::{ser::Error, Deserialize, Deserializer, Serialize, Serializer};
2
3#[derive(Clone, Debug, PartialEq, Eq)]
4pub enum OptionSerializer<T> {
5    Some(T),
6    None,
7    Skip,
8}
9
10impl<T> OptionSerializer<T> {
11    pub fn none() -> Self {
12        Self::None
13    }
14
15    pub fn skip() -> Self {
16        Self::Skip
17    }
18
19    pub fn should_skip(&self) -> bool {
20        matches!(self, Self::Skip)
21    }
22
23    pub fn or_skip(option: Option<T>) -> Self {
24        match option {
25            Option::Some(item) => Self::Some(item),
26            Option::None => Self::Skip,
27        }
28    }
29
30    pub fn as_ref(&self) -> OptionSerializer<&T> {
31        match self {
32            OptionSerializer::Some(item) => OptionSerializer::Some(item),
33            OptionSerializer::None => OptionSerializer::None,
34            OptionSerializer::Skip => OptionSerializer::Skip,
35        }
36    }
37}
38
39impl<T> From<Option<T>> for OptionSerializer<T> {
40    fn from(option: Option<T>) -> Self {
41        match option {
42            Option::Some(item) => Self::Some(item),
43            Option::None => Self::None,
44        }
45    }
46}
47
48impl<T> From<OptionSerializer<T>> for Option<T> {
49    fn from(option: OptionSerializer<T>) -> Self {
50        match option {
51            OptionSerializer::Some(item) => Self::Some(item),
52            _ => Self::None,
53        }
54    }
55}
56
57impl<T: Serialize> Serialize for OptionSerializer<T> {
58    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
59        where
60            S: Serializer,
61    {
62        match self {
63            Self::Some(item) => item.serialize(serializer),
64            Self::None => serializer.serialize_none(),
65            Self::Skip => Err(Error::custom("Skip variants should not be serialized")),
66        }
67    }
68}
69
70impl<'de, T: Deserialize<'de>> Deserialize<'de> for OptionSerializer<T> {
71    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
72        where
73            D: Deserializer<'de>,
74    {
75        Option::deserialize(deserializer).map(Into::into)
76    }
77}
solana_binary_encoder/option_serializer.rs

solana_binary_encoder/
option_serializer.rs
