maybe-owned 0.3.4

provides a `MaybeOwned` (and `MaybeOwnedMut`) type similar to std's `Cow` but it implements `From<T>` and `From<&'a T>` and does not require `ToOwned`
Documentation 
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

//! Serde `Serialize` and `Deserialize` implementations for `MaybeOwned`.
use serde::{Deserialize, Deserializer, Serialize, Serializer};

use {MaybeOwned, MaybeOwnedMut};

macro_rules! serde_impls {
    ($Name:ident) => {
        impl<'a, T: Serialize> Serialize for $Name<'a, T> {
            fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
                match self {
                    Self::Owned(v) => v.serialize(serializer),
                    Self::Borrowed(v) => v.serialize(serializer),
                }
            }
        }

        impl<'a, 'de, T: Deserialize<'de>> Deserialize<'de> for $Name<'a, T> {
            fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
            where
                D: Deserializer<'de>,
            {
                T::deserialize(deserializer).map(Self::Owned)
            }
        }
    };
}

serde_impls!(MaybeOwned);
serde_impls!(MaybeOwnedMut);