bevy_core/
serde.rs

1use core::{
2    any,
3    fmt::{self, Formatter},
4};
5
6use serde::{
7    de::{Error, Visitor},
8    Deserialize, Deserializer, Serialize, Serializer,
9};
10
11use super::{name::Name, FrameCount};
12
13impl Serialize for Name {
14    fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
15        serializer.serialize_str(self.as_str())
16    }
17}
18
19impl<'de> Deserialize<'de> for Name {
20    fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
21        deserializer.deserialize_str(EntityVisitor)
22    }
23}
24
25struct EntityVisitor;
26
27impl<'de> Visitor<'de> for EntityVisitor {
28    type Value = Name;
29
30    fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
31        formatter.write_str(any::type_name::<Name>())
32    }
33
34    fn visit_str<E: Error>(self, v: &str) -> Result<Self::Value, E> {
35        Ok(Name::new(v.to_string()))
36    }
37
38    fn visit_string<E: Error>(self, v: String) -> Result<Self::Value, E> {
39        Ok(Name::new(v))
40    }
41}
42
43// Manually implementing serialize/deserialize allows us to use a more compact representation as simple integers
44impl Serialize for FrameCount {
45    fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
46        serializer.serialize_u32(self.0)
47    }
48}
49
50impl<'de> Deserialize<'de> for FrameCount {
51    fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
52        deserializer.deserialize_u32(FrameVisitor)
53    }
54}
55
56struct FrameVisitor;
57
58impl<'de> Visitor<'de> for FrameVisitor {
59    type Value = FrameCount;
60
61    fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
62        formatter.write_str(any::type_name::<FrameCount>())
63    }
64
65    fn visit_u32<E>(self, v: u32) -> Result<Self::Value, E>
66    where
67        E: Error,
68    {
69        Ok(FrameCount(v))
70    }
71}
72
73#[cfg(test)]
74mod tests {
75    use super::*;
76
77    use serde_test::{assert_tokens, Token};
78
79    #[test]
80    fn test_serde_name() {
81        let name = Name::new("MyComponent");
82        assert_tokens(&name, &[Token::String("MyComponent")]);
83    }
84
85    #[test]
86    fn test_serde_frame_count() {
87        let frame_count = FrameCount(100);
88        assert_tokens(&frame_count, &[Token::U32(100)]);
89    }
90}
bevy_core/serde.rs

bevy_core/
serde.rs
