nullable

inline fun <I : Any, O : Any> nullable(name: String, crossinline encoder: (I) -> O, crossinline decoder: (O) -> I?): Codec<I, O>(source)

Builds a codec that tolerates missing values by using a nullable decoding function.

a codec that reports failures and uses encoder for serialization.

domain type to decode and encode.

serialized representation produced during encoding.

name

human readable identifier used in error messages.

encoder

transformation applied when encoding I to O.

decoder

nullable transformation that converts O back to I; returning null yields an error.