Struct OptionCodec

pub struct OptionCodec<C>(/* private fields */);

Wraps a string codec that encodes T to create a codec that encodes Option<T>.

Example:

let original_value = Some(4);
let encoded = OptionCodec::<FromToStringCodec>::encode(&original_value).unwrap();
let decoded = OptionCodec::<FromToStringCodec>::decode(&encoded).unwrap();

assert_eq!(decoded, original_value);

Trait Implementations

impl<T, D> Decoder<Option<T>> for OptionCodec<D>

where D: Decoder<T, Encoded = str>,

type Error = <D as Decoder<T>>::Error

type Encoded = str

fn decode(str: &Self::Encoded) -> Result<Option<T>, Self::Error>

impl<T, E> Encoder<Option<T>> for OptionCodec<E>

where E: Encoder<T, Encoded = String>,

type Error = <E as Encoder<T>>::Error

type Encoded = String

fn encode(val: &Option<T>) -> Result<String, Self::Error>