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Deserialize unsized Arc and Rc

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This commit is contained in:
David Tolnay
2017-09-04 10:56:40 -07:00
parent a42008f695
commit 972da59ebc
2 changed files with 63 additions and 2 deletions
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serde/src/de/impls.rs
+27 -2
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@@ -1112,10 +1112,10 @@ forwarded_impl!((T), Box<[T]>, Vec::into_boxed_slice);
#[cfg(any(feature = "std", feature = "alloc"))]
forwarded_impl!((), Box<str>, String::into_boxed_str);
#[cfg(all(feature = "rc", any(feature = "std", feature = "alloc")))]
#[cfg(all(not(feature = "unstable"), feature = "rc", any(feature = "std", feature = "alloc")))]
forwarded_impl!((T), Arc<T>, Arc::new);
#[cfg(all(feature = "rc", any(feature = "std", feature = "alloc")))]
#[cfg(all(not(feature = "unstable"), feature = "rc", any(feature = "std", feature = "alloc")))]
forwarded_impl!((T), Rc<T>, Rc::new);
#[cfg(any(feature = "std", feature = "alloc"))]
@@ -1135,6 +1135,31 @@ where
////////////////////////////////////////////////////////////////////////////////
#[cfg(all(feature = "unstable", feature = "rc", any(feature = "std", feature = "alloc")))]
macro_rules! box_forwarded_impl {
($t:ident) => {
impl<'de, T: ?Sized> Deserialize<'de> for $t<T>
where
Box<T>: Deserialize<'de>,
{
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
Box::deserialize(deserializer).map(Into::into)
}
}
}
}
#[cfg(all(feature = "unstable", feature = "rc", any(feature = "std", feature = "alloc")))]
box_forwarded_impl!(Rc);
#[cfg(all(feature = "unstable", feature = "rc", any(feature = "std", feature = "alloc")))]
box_forwarded_impl!(Arc);
////////////////////////////////////////////////////////////////////////////////
impl<'de, T> Deserialize<'de> for Cell<T>
where
T: Deserialize<'de> + Copy,