1 //! An example of implementing `serde::Serialize` and `serde::Deserialize`.
2 //! The `#[serde(transparent)]` attribute is recommended to serialize directly
3 //! to the underlying bits type without wrapping it in a `serde` newtype.
4 
5 #[cfg(feature = "serde")]
main()6 fn main() {
7     use serde_derive::*;
8 
9     bitflags::bitflags! {
10         #[derive(Serialize, Deserialize, Debug, PartialEq, Eq)]
11         #[serde(transparent)]
12         pub struct Flags: u32 {
13             const A = 1;
14             const B = 2;
15             const C = 4;
16             const D = 8;
17         }
18     }
19 
20     let flags = Flags::A | Flags::B;
21 
22     let serialized = serde_json::to_string(&flags).unwrap();
23 
24     println!("{:?} -> {}", flags, serialized);
25 
26     assert_eq!(serialized, r#""A | B""#);
27 
28     let deserialized: Flags = serde_json::from_str(&serialized).unwrap();
29 
30     println!("{} -> {:?}", serialized, flags);
31 
32     assert_eq!(deserialized, flags);
33 }
34 
35 #[cfg(not(feature = "serde"))]
main()36 fn main() {}
37