Struct serde_with::FromInto [−][src]
pub struct FromInto<T>(_);
Serialize value by converting to/from a proxy type with serde support.
This adapter serializes a type O
by converting it into a second type T
and serializing T
.
Deserializing works analogue, by deserializing a T
and then converting into O
.
struct S { #[serde_as(as = "FromInto<T>")] value: O, }
For serialization O
needs to be O: Into<T> + Clone
.
For deserialization the opposite T: Into<O>
is required.
The Clone
bound is required since serialize
operates on a reference but Into
implementations on references are uncommon.
Note: TryFromInto
is the more generalized version of this adapter which uses the TryInto
trait instead.
Example
#[derive(Clone, Debug, PartialEq)] struct Rgb { red: u8, green: u8, blue: u8, } impl From<(u8, u8, u8)> for Rgb { ... } impl From<Rgb> for (u8, u8, u8) { ... } #[serde_as] #[derive(Deserialize, Serialize)] struct Color { #[serde_as(as = "FromInto<(u8, u8, u8)>")] rgb: Rgb, } let color = Color { rgb: Rgb { red: 128, green: 64, blue: 32, }, }; // Define our expected JSON form let j = json!({ "rgb": [128, 64, 32], }); // Ensure serialization and deserialization produce the expected results assert_eq!(j, serde_json::to_value(&color).unwrap()); assert_eq!(color, serde_json::from_value(j).unwrap());
Trait Implementations
impl<'de, T, U> DeserializeAs<'de, T> for FromInto<U> where
U: Into<T>,
U: Deserialize<'de>,
[src]
impl<'de, T, U> DeserializeAs<'de, T> for FromInto<U> where
U: Into<T>,
U: Deserialize<'de>,
[src]fn deserialize_as<D>(deserializer: D) -> Result<T, D::Error> where
D: Deserializer<'de>,
[src]
fn deserialize_as<D>(deserializer: D) -> Result<T, D::Error> where
D: Deserializer<'de>,
[src]Deserialize this value from the given Serde deserializer.
impl<T, U> SerializeAs<T> for FromInto<U> where
T: Into<U> + Clone,
U: Serialize,
[src]
impl<T, U> SerializeAs<T> for FromInto<U> where
T: Into<U> + Clone,
U: Serialize,
[src]fn serialize_as<S>(source: &T, serializer: S) -> Result<S::Ok, S::Error> where
S: Serializer,
[src]
fn serialize_as<S>(source: &T, serializer: S) -> Result<S::Ok, S::Error> where
S: Serializer,
[src]Serialize this value into the given Serde serializer.
impl<T: Copy> Copy for FromInto<T>
[src]
Auto Trait Implementations
impl<T> RefUnwindSafe for FromInto<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
impl<T> Send for FromInto<T> where
T: Send,
T: Send,
impl<T> Sync for FromInto<T> where
T: Sync,
T: Sync,
impl<T> Unpin for FromInto<T> where
T: Unpin,
T: Unpin,
impl<T> UnwindSafe for FromInto<T> where
T: UnwindSafe,
T: UnwindSafe,
Blanket Implementations
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]pub fn borrow_mut(&mut self) -> &mut T
[src]
pub fn borrow_mut(&mut self) -> &mut T
[src]Mutably borrows from an owned value. Read more
impl<T> ToOwned for T where
T: Clone,
[src]
impl<T> ToOwned for T where
T: Clone,
[src]type Owned = T
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
[src]
pub fn to_owned(&self) -> T
[src]Creates owned data from borrowed data, usually by cloning. Read more
pub fn clone_into(&self, target: &mut T)
[src]
pub fn clone_into(&self, target: &mut T)
[src]🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more