Struct NoneAsZero 

pub struct NoneAsZero;

De/Serialize an Option<NonZero*> losslessly as the inner integer

Serde natively supports NonZeroU8 and friends, but rejects 0 during deserialization. This adapter treats 0 as None and any other value as Some, allowing the wire format to always be a plain integer.

Supported in-memory types are Option<NonZeroU8>, Option<NonZeroU16>, Option<NonZeroU32>, Option<NonZeroU64>, Option<NonZeroU128>, Option<NonZeroUsize>, Option<NonZeroI8>, Option<NonZeroI16>, Option<NonZeroI32>, Option<NonZeroI64>, Option<NonZeroI128>, and Option<NonZeroIsize>.

Examples

#[serde_as]
#[derive(Deserialize, Serialize)]
struct Data {
    #[serde_as(as = "NoneAsZero")]
    value: Option<NonZeroU32>,
}

let data = Data { value: NonZeroU32::new(7) };
assert_eq!(json!({"value": 7}), serde_json::to_value(&data).unwrap());
assert_eq!(data, serde_json::from_value(json!({"value": 7})).unwrap());

let none = Data { value: None };
assert_eq!(json!({"value": 0}), serde_json::to_value(&none).unwrap());
assert_eq!(none, serde_json::from_value(json!({"value": 0})).unwrap());

Trait Implementations

impl<'de> DeserializeAs<'de, Option<NonZero<i8>>> for NoneAsZero

fn deserialize_as<D>(deserializer: D) -> Result<Option<NonZeroI8>, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> DeserializeAs<'de, Option<NonZero<i16>>> for NoneAsZero

fn deserialize_as<D>(deserializer: D) -> Result<Option<NonZeroI16>, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> DeserializeAs<'de, Option<NonZero<i32>>> for NoneAsZero

fn deserialize_as<D>(deserializer: D) -> Result<Option<NonZeroI32>, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> DeserializeAs<'de, Option<NonZero<i64>>> for NoneAsZero

fn deserialize_as<D>(deserializer: D) -> Result<Option<NonZeroI64>, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> DeserializeAs<'de, Option<NonZero<i128>>> for NoneAsZero

fn deserialize_as<D>(deserializer: D) -> Result<Option<NonZeroI128>, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> DeserializeAs<'de, Option<NonZero<isize>>> for NoneAsZero

fn deserialize_as<D>(deserializer: D) -> Result<Option<NonZeroIsize>, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> DeserializeAs<'de, Option<NonZero<u8>>> for NoneAsZero

fn deserialize_as<D>(deserializer: D) -> Result<Option<NonZeroU8>, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> DeserializeAs<'de, Option<NonZero<u16>>> for NoneAsZero

fn deserialize_as<D>(deserializer: D) -> Result<Option<NonZeroU16>, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> DeserializeAs<'de, Option<NonZero<u32>>> for NoneAsZero

fn deserialize_as<D>(deserializer: D) -> Result<Option<NonZeroU32>, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> DeserializeAs<'de, Option<NonZero<u64>>> for NoneAsZero

fn deserialize_as<D>(deserializer: D) -> Result<Option<NonZeroU64>, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> DeserializeAs<'de, Option<NonZero<u128>>> for NoneAsZero

fn deserialize_as<D>(deserializer: D) -> Result<Option<NonZeroU128>, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> DeserializeAs<'de, Option<NonZero<usize>>> for NoneAsZero

fn deserialize_as<D>(deserializer: D) -> Result<Option<NonZeroUsize>, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl SerializeAs<Option<NonZero<i8>>> for NoneAsZero

fn serialize_as<S>( source: &Option<NonZeroI8>, serializer: S, ) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl SerializeAs<Option<NonZero<i16>>> for NoneAsZero

fn serialize_as<S>( source: &Option<NonZeroI16>, serializer: S, ) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl SerializeAs<Option<NonZero<i32>>> for NoneAsZero

fn serialize_as<S>( source: &Option<NonZeroI32>, serializer: S, ) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl SerializeAs<Option<NonZero<i64>>> for NoneAsZero

fn serialize_as<S>( source: &Option<NonZeroI64>, serializer: S, ) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl SerializeAs<Option<NonZero<i128>>> for NoneAsZero

fn serialize_as<S>( source: &Option<NonZeroI128>, serializer: S, ) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl SerializeAs<Option<NonZero<isize>>> for NoneAsZero

fn serialize_as<S>( source: &Option<NonZeroIsize>, serializer: S, ) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl SerializeAs<Option<NonZero<u8>>> for NoneAsZero

fn serialize_as<S>( source: &Option<NonZeroU8>, serializer: S, ) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl SerializeAs<Option<NonZero<u16>>> for NoneAsZero

fn serialize_as<S>( source: &Option<NonZeroU16>, serializer: S, ) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl SerializeAs<Option<NonZero<u32>>> for NoneAsZero

fn serialize_as<S>( source: &Option<NonZeroU32>, serializer: S, ) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl SerializeAs<Option<NonZero<u64>>> for NoneAsZero

fn serialize_as<S>( source: &Option<NonZeroU64>, serializer: S, ) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl SerializeAs<Option<NonZero<u128>>> for NoneAsZero

fn serialize_as<S>( source: &Option<NonZeroU128>, serializer: S, ) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl SerializeAs<Option<NonZero<usize>>> for NoneAsZero

fn serialize_as<S>( source: &Option<NonZeroUsize>, serializer: S, ) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.