Struct BoolFromInt 

pub struct BoolFromInt<S: Strictness = Strict>(/* private fields */);

Deserialize a boolean from a number

Deserialize a number (of u8) and turn it into a boolean. The adapter supports a Strict and Flexible format. In Strict mode, the number must be 0 or 1. All other values produce an error. In Flexible mode, the number any non-zero value is converted to true.

During serialization only 0 or 1 are ever emitted.

Examples

#[serde_as]
#[derive(Deserialize, Serialize)]
struct Data(#[serde_as(as = "BoolFromInt")] bool);

let data = Data(true);
let j = json!(1);
// Ensure serialization and deserialization produce the expected results
assert_eq!(j, serde_json::to_value(&data).unwrap());
assert_eq!(data, serde_json::from_value(j).unwrap());

// false maps to 0
let data = Data(false);
let j = json!(0);
assert_eq!(j, serde_json::to_value(&data).unwrap());
assert_eq!(data, serde_json::from_value(j).unwrap());
#[serde_as]
#[derive(Deserialize, Serialize)]
struct Flexible(#[serde_as(as = "BoolFromInt<serde_with::formats::Flexible>")] bool);

// Flexible turns any non-zero number into true
let data = Flexible(true);
let j = json!(100);
assert_eq!(data, serde_json::from_value(j).unwrap());

Trait Implementations

impl<'de> DeserializeAs<'de, bool> for BoolFromInt<Strict>

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

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'de> DeserializeAs<'de, bool> for BoolFromInt<Flexible>

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

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<STRICTNESS: Strictness> SerializeAs<bool> for BoolFromInt<STRICTNESS>

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

where S: Serializer,

Serialize this value into the given Serde serializer.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 0 bytes